CA1326614C - Device for launching and hoisting lifeboats, pick-up boats, etc. - Google Patents
Device for launching and hoisting lifeboats, pick-up boats, etc.Info
- Publication number
- CA1326614C CA1326614C CA000566022A CA566022A CA1326614C CA 1326614 C CA1326614 C CA 1326614C CA 000566022 A CA000566022 A CA 000566022A CA 566022 A CA566022 A CA 566022A CA 1326614 C CA1326614 C CA 1326614C
- Authority
- CA
- Canada
- Prior art keywords
- buoyancy means
- hawsers
- extend
- spreader
- fork
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B23/00—Equipment for handling lifeboats or the like
- B63B23/40—Use of lowering or hoisting gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/36—Arrangement of ship-based loading or unloading equipment for floating cargo
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Jib Cranes (AREA)
- Indole Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Abstract A device is disclosed for launching and hoisting a lifeboat, pickup boat, etc., and for catching people and objects floating in the sea, comprising two booms from which hawsers extend to elongated buoyancy means, which are mutually connected at a mutual distance, and which are connected to said hawsers via spreader yokes, from which ropes extend to the buoyancy means, and bottom members spanning the space betw-een the buoyancy means and being in the water when said buoyancy means are afloat, said ropes passing through guid-es on the buoyancy means and acting as guides for the buoyancy means when the latter are afloat, said ropes being connected with the respective adjacent bottom members. Said two booms are assembled to a fork-shaped swing crane-boom unit . Booms are telescopic , and hawsers extend from the station-ary boom sections to a spreader yoke for one buoyancy means , whereas hawsers extend from the extendable boom sections to a spreader yoke for the second buoyancy means .
Description
- A device for launching and hoisting lifeboats, pick-up boats, etc.
The invention relates to a device for launching and hoisting lifeboats, pick-up boats, etc., and for catching people and objects floa-ting in the sea. Said device comprises two 'booms from which hawsers extend to two elongated buoyancy means which are connected at a mutual distance, and are connected with said hawsers via spreader yokes, from which ropes extend ' 10 to the 'buoyancy means, /and bottom members spanning across the space between said buoyancy means \and extending in the water when the buoyancy members are afloat, said ropes passing through guides on the buoyancy means ~and acting as guides ko the buoyancy members when the latter are afloat on the sea, 15 said ropes being connected with the respective, adjacent bottom members~
From N0-PS 140 530, and N0-PS 141 929 a device is known for launching and hoisting lifeboats, pick-up boats, etc, 20 comprising two booms from which hawsers extend to two elongat-ed 'buoyancy means connected at a mutual distance, which buoyancy means are connected with said hawsers via spreader yokes from which ropes extend to the buoyancy means. The space between buoyancy means is spanned by bottom members which 25~ are in the water when the buoyancy means are afloat on the sea.
The utilized booms are deslgned as separate units as known '~
from conventional davit arrangements. For stabilizing the dock ''' formed by said floating means at sea a comparatively complicat-ed~and expensive arrangement with hydraulic arms projecting ` 30 down into the water from carrier means placed alongside the vessel are us-d.
Moreover, it is known to use a weight immersed in water to stabilize a vertically hanging rope, and it is also known that 3s~such a weight may be designed as a bottom member spanning a catching dock.
I _ With ~his known technology for a starting point, according to i:~ : :
! ~ ~
_ the invention, a device as mentioned above is proposed, which is characterized by the fact that said two booms are assembl-ed into a fork-shaped swing crane-boom unit, that the booms are telescopic, and that hawsers extend from the stationary boom sections to a spreader yoke for one of the buoyancy means, whereas hawsers extend from the movable boom sections to a spreader yoke for the second buoyancy means.
With the concept of the invention the davit-arrangement is, -thus, abandoned and, in stead, the advantages of a swing crane are utilized. With said two booms designed as members of a swing crane it will be possible to hoist the dock formed by the buoyancy means from the water and swing it, by the aid of the swing crane, a distance inward on deck, e.g. the relatively protected working deck on a supply ship. Such a possibility of hoisting and placing the dock with its content is very important in connection with hoisting hyperbaric lifeboats, because necessary equipment and aid can then arrive more quickly.
.
Each spreader yoke is connected wlth one and the same buoyancy means. Each spreader yoke is connected with both arms or booms of the two-armed swing crane. Due to the fact that the booms are telescopic the buoyancy means placed outermost in relation to the swing crane may be adjusted as regards its position in relation to the other buoyancy means by retraction/extension ; of the telescopic outer boom sections. This permits an especially advantageous relative adjustment of the buoyancy means, so that the dock formed by said buoyancy means can , . . .
be provided with a larger inlet opening by placing the buoyancy means in a mutually divergent position. This is achived by extending one telescopic boom more than the other.
At the same time, the entire dock can be turned by swinging the swing crane, into a position with the inlet opening of -the dock facing away from the ship's slde or from the side of I the installation where the device is arranged. In this manner, e.g. a life boat can be directed into the dock at an angle -. ' ': . :-, "'',~
:,'::, :
_ with the ship's side. Experience has shown that the greatest hazard during rescue operations occurs when the object to be rescued gets too close to the ship's side. Then the hazard of destroying the object is imminent. This problem of distance may be overcome due to the fact that the device can be guided as mentioned by the aid of the crane. If the dock formed by the buoyancy means is, e.g. turned 30 in relation to the ship's side open waters will be achieved for relatively safe running-in/catching in the dock. This possibility combined with the possibility of enlarging the inlet of the dock will provide for a very safe device.
In an advantageous embodiment of the device said boom assembly comprises a rigid fork stem being turnable about a horizontal lS axis in the ring mount and with both fork members being telescopic~ This means that only the outer portion of the swing crane is fork shaped or two-armed. The advantage of this embodiment i6 that there is a monolithic Eork stem which is turned, and raised, and lowered, in stead of two booms project-ing from the ring mount.
The fork members are, advantageously, placed at an obtuseangle with the fork stem. In the normal position of utilization of the fork stem the fork members can then,advantageously, 25 extend horizontally outwards, i.e. substantially in parallel with the water surface. In this manner the free length of said two outer hawsers is reduced.
In order to stabilize the device, i.e. the dock formed by the buoyancy means, a control line may extend to a suitable winch from each end area of the buoyancy means closest to the crane. By the aid of said control lines the dock may be controlled and kept in a stable position during hoisting/
launching operationsj or when the crane is turned around to ~put~the dock on deck. In order to protect the object to be t:aken up or launched each spreader yoke is, advantageously~designed a5 a rigid body cemented in a fender _ material.
: , :
`
~ 3~66 1 4 - A three-armed ropefork may, advantageously extend from each hawser to the associated spreader yoke. Such a design would provide for the necessary stable suspension of the spreader yokes and associated buoyancy means.
The elongated buoyancy means may, advantageously be composed of a plurality of floats connected in sequence. The spreader yokes will ensure the required stability, at the same time as the dock will have the desired flexibility in the water.
The dock may be open at one or both ends, as desired. One -dock end may be closed by the aid of floats of the same kind as those used in the elongated buoyancy means. -~
~:': .
The bottom mernbers, as mentioned, connect said ropes under the buoyancy means and act as spreader means. An especially suitable embodiment of the bottom members, which has inventive value per se, comprises bottom members designed as straps with attached spring steel members of ~he same length, and with -~
these units cemented in a resilient protecting material. Such a bottom member will be rigid enough to provide the desired spreading effect; at the same time it will in case of rise and fall, at least to a cer~ain degree, adapt to the shape of the object in the dock and provide good support for said object.
~25 Between bottom members a net may be stretched in an advantage~
ous and known manner; this being of special importance when relatively small objects, eOg. persons, are to be rescued from the sea.
30~
The~swing crane is advantageously provided with a contact face agianst which the dock may be brought to rest. For this the~mentioned~control lines may advantageously be utilized.
35 ;The invention is disclosed in more detail below~with reference ~`
to the drawing, where ~ - ~ Figure l ~s a ~view of a device according to the invention, :~ ^:. :
13~6614 _ as seen along the ship's side, Figure 2 is a plan view of the two-armed swing crane shown in Figure l, Figure 3 shows the device according -to Figure l, as seen in the direction of the ship's side and in a smaller scale, Figure 4 shows a plan view of the device according to Figure3, Figure 5 shows the device according to the invention with the hawsers heaved in, so that the shown pickup boat is ready for heaving in, --Figure 6 shows the same situation as Figure 5, as seen in the direction of the shipis side, Figure 7 shows the pickup boat shown in Figures 5 and 6 in a hoisted up state, ready for swinging in over the 16 ship's deck, Figure 8 is a view like Figure 4, but with the dock comprised of buoyancy means in a state with an expanded inlet, -Figure 9 shows the hawser and rope arrangement with associated ~ -bottom members in a plan view, ~O Figure lO is an end view of the arrangement shown in Figure 9, Fig1lre ll i~ a diagrammatical view of one half of a bottom member, :
Figure 12 is a sectional view of the bottom member, along sectional line XII-XII in Figure ll, shown in a larger i 25 scale, and :- Figure 13 is a vie, partly in section, of a spreader yoke.
Figure l shows a crane support 3 arranged on deck l of a vessel 2. Swingably mounted on crane support 3 is a unit 4 comprising a crane tower 5, a cabin 6 for the crane operator, and a~ring mount 7. This unit 4 is mounted by the aid of ring :; mount 7 to b0 rotatable in a manner known per se about a vertical axis on crane support 3.
~: - :::
35~A fork shaped boom unit 8 is mounted in tower 5 so as to be ; tiltable about a horizontal axis 9 and can be tilted up and - -down about mounting axis 9 by the aid of a hydraulic cylinder _lO. The fork shaped design of boom unit 8 will appear from 132661~
_ Figure 2 showing the swing crane from above. Boom unit 8, thus, comprises a rigid fork stem 11 and a fork projecting from said stem at an obtuse angle and comprising two tele-scopic boom sections or fork members 12 and 13. Each fork member is built with a stationary section 14, and 15, respectably, and a teleskopic or extendable boom section 16, and 17, respectively. The swing crane is provided with, totally, four hawsers from winches 18. Hawsers 19, 20/ 21, 22 extend over vertical pulleys 23, 24, 25, and 26, resp., and from there down to dock 27.
Said dock 27 comprises two elongated buoyancy means 28, 29.
Each buoyancy means is connected with a spreader yoke 30, 31, resp. by the aid of ropes 40 extending from the associated spreader yoke down through vertical rope guides 41, 42 on the buoyancy means, and further down to associated bottom means 43. As shown in Figure 9, ropes 40 extend upwards ko spreader yoke 30, and 31, resp. and are connected with the spreader yoke in a manner not shown. From the spreader yoke ropes 40 are gathered by three-armed ropeforks 44, 45, shown in Figure 9, from which the respective hawsers 19-22 extend. ~
..
It will appear, especially from Figure 9, that each buoyancy means is comprised of a plurality of floats 46 connected in sequence. Connection is achieved by simple lugs which are connected by vertical bolts 47.
The dock is alosed at one end by the aid of two floats 46 in the shown embodiments, which appears most clearly from Figures ;4 and 8. The structure of bottom members 43 in the embodiment lS rather speclal and ls shown in detail in Figures 11 and 12.
As~shown in Figure 11 the bottom member in this case consists ; of a polyester strap 48 with a spring steel member 49 secured to it at equal intervals. Securing is achieved by the aid of clamp means 50, and the assembly is cemented in a suitable ; ~ material, in the shown case PVC, designated 51. In case of _ ~heaving bottom member 43 will be able to adapt to the ~: :
7 1326~14 _ shape of the rescued object and, together with the buoyancy means, provide good support for said object. This is, e.g.
illustrated in Figures 5 and 7 (compare with Figure 1). The mode of operation of the device will now be disclosed in more de~ail with reference to Figures 1-7. In Figure 1 dock 27 is shown to be placed in the water. Spreader yokes 30 and 31 are placed far down adjacent buoyancy means 28,29, and the ropes 40 extending from said spreader yokes extend down into the water with the associated bottom means 43. In the shown 10 embodiment bottom means 43 in Figure 1 will be approximately -2.5 m below the bottom of the shown pickup vessel 52 which has entered dock 27 formed by the buoyancy means. Said depth of approximately 2.5 m provides for safe clearing for use of the pickup vessel screw. The situation as shown in Figure 1 is also found in Figure 3 showing the dock and pickup vessel in a view ~owards ship 2. Figure 4 shows the same situation as Figures 1 and 2, in a plan view.
From inner buoyancy means 28 a control line 53, 54, resp.
20 extends to a so called tugger-winch 55, 56 provided on the swingable crane unit 4. Said control lines 53,54 serve to prevent toss during launching/hoisting, or when the swing crane is turned about to land the rescued object 52 on-deck 1;
and they may be used to pull dock 27 towards a resting surface .
25 60 on the swing crane.
Additionally, in Figure 4 a line 57 is shown extending for-wards to an auxiliary boom 58 extended from ship 2. Line 57 ^-contributes to stabllize the dock in the water. ~-30~
In Figures 5 and 6 the device;is shown after hawsers 19-22 have been hauled in by the aid of winches 18. As shown, bottom members 43 are now hoisted up closely beneath the bottom of -~Pickup vessel 52. Continued hauling in of the hawsers will cause pickup vessel 52 to be lifted~from the water, as shown n Figure 7. From Figure 7 it will appear how dock 27 with pickup vessel 52 is pulled into contact with the swingable ~ crane unit 4. The crane may now be turned to bring dock 27 'I ~ ' . : .'.
~3 1 326~1 4 ~:
with pickup vessel 52 to a central posi-tion on deck 1, where the dock with the pickup vessel may be put down. When a hyperbaric lifeboat is rescued it is now possible to supply pressured air, oxygen, water, electric power, etc by simple connections, so that divers under pressure will also be safe in case of an evacuation.
As shown in Figures 3 and 6 a net 59 is stretched between bottom members 43.
. , '"
In Flgure 8 lt is shown how the telescoping booms, and the --swingable crane design may be utilized in an advantageous manner. Crane unit 4 with fork stem 11, and associated fork -members 12, 13 is somewhat displaced from the position shown in Figure 4, at the same time as fork member 13 has been telescopically extended causing the outer buoyancy means 29 -to diverge outwards relative to the inner buoyancy means 28 in stead of being positioned in parallel with said means 28.
In this manner dock 27 is provided with a wider inlet opening -~
60 for pickup vessel 52. As soon as pickup vessel 52-has been moved into dock 27 hoisting operations may begin, if desired, with previous or simultaneous parallel positioning of the buoyancy means by retraction of the telescopic fork member 13. -: ~ :. : .
As shown in Figure 13, spreader yokes (30,31) are designed as rigid members, e.g. a steel rod 61 being cemented in a suitable fender material 62. Ropes 40 pass freely through half links 63 secured to the spreader yoke, as shown. Due to the fact that ropes 40 are continuous, and are only secured to spreader yoke~31 for the spreading effect, the main weight will be absorbed by the ropes, permitting reduced dimensions of the spreader yoke.
c ~ The new device may, advantageously, be winterized.
I All~ ~winches 18, and hawser drums, and pulleys may, thus, advantageously be mounted inside the crane, and hawsers 19-22 may extend inside the crane booms 12,13. By supplying hot air, either directly -from the engine room of the~ship, or by having a hot air blower (not shown) placed I
- 9 1 3 ~ 6 ~
_ inside the crane proper, the device will be operationally independent of the ambient temperature. --' ,' '', :' -:'-, '
The invention relates to a device for launching and hoisting lifeboats, pick-up boats, etc., and for catching people and objects floa-ting in the sea. Said device comprises two 'booms from which hawsers extend to two elongated buoyancy means which are connected at a mutual distance, and are connected with said hawsers via spreader yokes, from which ropes extend ' 10 to the 'buoyancy means, /and bottom members spanning across the space between said buoyancy means \and extending in the water when the buoyancy members are afloat, said ropes passing through guides on the buoyancy means ~and acting as guides ko the buoyancy members when the latter are afloat on the sea, 15 said ropes being connected with the respective, adjacent bottom members~
From N0-PS 140 530, and N0-PS 141 929 a device is known for launching and hoisting lifeboats, pick-up boats, etc, 20 comprising two booms from which hawsers extend to two elongat-ed 'buoyancy means connected at a mutual distance, which buoyancy means are connected with said hawsers via spreader yokes from which ropes extend to the buoyancy means. The space between buoyancy means is spanned by bottom members which 25~ are in the water when the buoyancy means are afloat on the sea.
The utilized booms are deslgned as separate units as known '~
from conventional davit arrangements. For stabilizing the dock ''' formed by said floating means at sea a comparatively complicat-ed~and expensive arrangement with hydraulic arms projecting ` 30 down into the water from carrier means placed alongside the vessel are us-d.
Moreover, it is known to use a weight immersed in water to stabilize a vertically hanging rope, and it is also known that 3s~such a weight may be designed as a bottom member spanning a catching dock.
I _ With ~his known technology for a starting point, according to i:~ : :
! ~ ~
_ the invention, a device as mentioned above is proposed, which is characterized by the fact that said two booms are assembl-ed into a fork-shaped swing crane-boom unit, that the booms are telescopic, and that hawsers extend from the stationary boom sections to a spreader yoke for one of the buoyancy means, whereas hawsers extend from the movable boom sections to a spreader yoke for the second buoyancy means.
With the concept of the invention the davit-arrangement is, -thus, abandoned and, in stead, the advantages of a swing crane are utilized. With said two booms designed as members of a swing crane it will be possible to hoist the dock formed by the buoyancy means from the water and swing it, by the aid of the swing crane, a distance inward on deck, e.g. the relatively protected working deck on a supply ship. Such a possibility of hoisting and placing the dock with its content is very important in connection with hoisting hyperbaric lifeboats, because necessary equipment and aid can then arrive more quickly.
.
Each spreader yoke is connected wlth one and the same buoyancy means. Each spreader yoke is connected with both arms or booms of the two-armed swing crane. Due to the fact that the booms are telescopic the buoyancy means placed outermost in relation to the swing crane may be adjusted as regards its position in relation to the other buoyancy means by retraction/extension ; of the telescopic outer boom sections. This permits an especially advantageous relative adjustment of the buoyancy means, so that the dock formed by said buoyancy means can , . . .
be provided with a larger inlet opening by placing the buoyancy means in a mutually divergent position. This is achived by extending one telescopic boom more than the other.
At the same time, the entire dock can be turned by swinging the swing crane, into a position with the inlet opening of -the dock facing away from the ship's slde or from the side of I the installation where the device is arranged. In this manner, e.g. a life boat can be directed into the dock at an angle -. ' ': . :-, "'',~
:,'::, :
_ with the ship's side. Experience has shown that the greatest hazard during rescue operations occurs when the object to be rescued gets too close to the ship's side. Then the hazard of destroying the object is imminent. This problem of distance may be overcome due to the fact that the device can be guided as mentioned by the aid of the crane. If the dock formed by the buoyancy means is, e.g. turned 30 in relation to the ship's side open waters will be achieved for relatively safe running-in/catching in the dock. This possibility combined with the possibility of enlarging the inlet of the dock will provide for a very safe device.
In an advantageous embodiment of the device said boom assembly comprises a rigid fork stem being turnable about a horizontal lS axis in the ring mount and with both fork members being telescopic~ This means that only the outer portion of the swing crane is fork shaped or two-armed. The advantage of this embodiment i6 that there is a monolithic Eork stem which is turned, and raised, and lowered, in stead of two booms project-ing from the ring mount.
The fork members are, advantageously, placed at an obtuseangle with the fork stem. In the normal position of utilization of the fork stem the fork members can then,advantageously, 25 extend horizontally outwards, i.e. substantially in parallel with the water surface. In this manner the free length of said two outer hawsers is reduced.
In order to stabilize the device, i.e. the dock formed by the buoyancy means, a control line may extend to a suitable winch from each end area of the buoyancy means closest to the crane. By the aid of said control lines the dock may be controlled and kept in a stable position during hoisting/
launching operationsj or when the crane is turned around to ~put~the dock on deck. In order to protect the object to be t:aken up or launched each spreader yoke is, advantageously~designed a5 a rigid body cemented in a fender _ material.
: , :
`
~ 3~66 1 4 - A three-armed ropefork may, advantageously extend from each hawser to the associated spreader yoke. Such a design would provide for the necessary stable suspension of the spreader yokes and associated buoyancy means.
The elongated buoyancy means may, advantageously be composed of a plurality of floats connected in sequence. The spreader yokes will ensure the required stability, at the same time as the dock will have the desired flexibility in the water.
The dock may be open at one or both ends, as desired. One -dock end may be closed by the aid of floats of the same kind as those used in the elongated buoyancy means. -~
~:': .
The bottom mernbers, as mentioned, connect said ropes under the buoyancy means and act as spreader means. An especially suitable embodiment of the bottom members, which has inventive value per se, comprises bottom members designed as straps with attached spring steel members of ~he same length, and with -~
these units cemented in a resilient protecting material. Such a bottom member will be rigid enough to provide the desired spreading effect; at the same time it will in case of rise and fall, at least to a cer~ain degree, adapt to the shape of the object in the dock and provide good support for said object.
~25 Between bottom members a net may be stretched in an advantage~
ous and known manner; this being of special importance when relatively small objects, eOg. persons, are to be rescued from the sea.
30~
The~swing crane is advantageously provided with a contact face agianst which the dock may be brought to rest. For this the~mentioned~control lines may advantageously be utilized.
35 ;The invention is disclosed in more detail below~with reference ~`
to the drawing, where ~ - ~ Figure l ~s a ~view of a device according to the invention, :~ ^:. :
13~6614 _ as seen along the ship's side, Figure 2 is a plan view of the two-armed swing crane shown in Figure l, Figure 3 shows the device according -to Figure l, as seen in the direction of the ship's side and in a smaller scale, Figure 4 shows a plan view of the device according to Figure3, Figure 5 shows the device according to the invention with the hawsers heaved in, so that the shown pickup boat is ready for heaving in, --Figure 6 shows the same situation as Figure 5, as seen in the direction of the shipis side, Figure 7 shows the pickup boat shown in Figures 5 and 6 in a hoisted up state, ready for swinging in over the 16 ship's deck, Figure 8 is a view like Figure 4, but with the dock comprised of buoyancy means in a state with an expanded inlet, -Figure 9 shows the hawser and rope arrangement with associated ~ -bottom members in a plan view, ~O Figure lO is an end view of the arrangement shown in Figure 9, Fig1lre ll i~ a diagrammatical view of one half of a bottom member, :
Figure 12 is a sectional view of the bottom member, along sectional line XII-XII in Figure ll, shown in a larger i 25 scale, and :- Figure 13 is a vie, partly in section, of a spreader yoke.
Figure l shows a crane support 3 arranged on deck l of a vessel 2. Swingably mounted on crane support 3 is a unit 4 comprising a crane tower 5, a cabin 6 for the crane operator, and a~ring mount 7. This unit 4 is mounted by the aid of ring :; mount 7 to b0 rotatable in a manner known per se about a vertical axis on crane support 3.
~: - :::
35~A fork shaped boom unit 8 is mounted in tower 5 so as to be ; tiltable about a horizontal axis 9 and can be tilted up and - -down about mounting axis 9 by the aid of a hydraulic cylinder _lO. The fork shaped design of boom unit 8 will appear from 132661~
_ Figure 2 showing the swing crane from above. Boom unit 8, thus, comprises a rigid fork stem 11 and a fork projecting from said stem at an obtuse angle and comprising two tele-scopic boom sections or fork members 12 and 13. Each fork member is built with a stationary section 14, and 15, respectably, and a teleskopic or extendable boom section 16, and 17, respectively. The swing crane is provided with, totally, four hawsers from winches 18. Hawsers 19, 20/ 21, 22 extend over vertical pulleys 23, 24, 25, and 26, resp., and from there down to dock 27.
Said dock 27 comprises two elongated buoyancy means 28, 29.
Each buoyancy means is connected with a spreader yoke 30, 31, resp. by the aid of ropes 40 extending from the associated spreader yoke down through vertical rope guides 41, 42 on the buoyancy means, and further down to associated bottom means 43. As shown in Figure 9, ropes 40 extend upwards ko spreader yoke 30, and 31, resp. and are connected with the spreader yoke in a manner not shown. From the spreader yoke ropes 40 are gathered by three-armed ropeforks 44, 45, shown in Figure 9, from which the respective hawsers 19-22 extend. ~
..
It will appear, especially from Figure 9, that each buoyancy means is comprised of a plurality of floats 46 connected in sequence. Connection is achieved by simple lugs which are connected by vertical bolts 47.
The dock is alosed at one end by the aid of two floats 46 in the shown embodiments, which appears most clearly from Figures ;4 and 8. The structure of bottom members 43 in the embodiment lS rather speclal and ls shown in detail in Figures 11 and 12.
As~shown in Figure 11 the bottom member in this case consists ; of a polyester strap 48 with a spring steel member 49 secured to it at equal intervals. Securing is achieved by the aid of clamp means 50, and the assembly is cemented in a suitable ; ~ material, in the shown case PVC, designated 51. In case of _ ~heaving bottom member 43 will be able to adapt to the ~: :
7 1326~14 _ shape of the rescued object and, together with the buoyancy means, provide good support for said object. This is, e.g.
illustrated in Figures 5 and 7 (compare with Figure 1). The mode of operation of the device will now be disclosed in more de~ail with reference to Figures 1-7. In Figure 1 dock 27 is shown to be placed in the water. Spreader yokes 30 and 31 are placed far down adjacent buoyancy means 28,29, and the ropes 40 extending from said spreader yokes extend down into the water with the associated bottom means 43. In the shown 10 embodiment bottom means 43 in Figure 1 will be approximately -2.5 m below the bottom of the shown pickup vessel 52 which has entered dock 27 formed by the buoyancy means. Said depth of approximately 2.5 m provides for safe clearing for use of the pickup vessel screw. The situation as shown in Figure 1 is also found in Figure 3 showing the dock and pickup vessel in a view ~owards ship 2. Figure 4 shows the same situation as Figures 1 and 2, in a plan view.
From inner buoyancy means 28 a control line 53, 54, resp.
20 extends to a so called tugger-winch 55, 56 provided on the swingable crane unit 4. Said control lines 53,54 serve to prevent toss during launching/hoisting, or when the swing crane is turned about to land the rescued object 52 on-deck 1;
and they may be used to pull dock 27 towards a resting surface .
25 60 on the swing crane.
Additionally, in Figure 4 a line 57 is shown extending for-wards to an auxiliary boom 58 extended from ship 2. Line 57 ^-contributes to stabllize the dock in the water. ~-30~
In Figures 5 and 6 the device;is shown after hawsers 19-22 have been hauled in by the aid of winches 18. As shown, bottom members 43 are now hoisted up closely beneath the bottom of -~Pickup vessel 52. Continued hauling in of the hawsers will cause pickup vessel 52 to be lifted~from the water, as shown n Figure 7. From Figure 7 it will appear how dock 27 with pickup vessel 52 is pulled into contact with the swingable ~ crane unit 4. The crane may now be turned to bring dock 27 'I ~ ' . : .'.
~3 1 326~1 4 ~:
with pickup vessel 52 to a central posi-tion on deck 1, where the dock with the pickup vessel may be put down. When a hyperbaric lifeboat is rescued it is now possible to supply pressured air, oxygen, water, electric power, etc by simple connections, so that divers under pressure will also be safe in case of an evacuation.
As shown in Figures 3 and 6 a net 59 is stretched between bottom members 43.
. , '"
In Flgure 8 lt is shown how the telescoping booms, and the --swingable crane design may be utilized in an advantageous manner. Crane unit 4 with fork stem 11, and associated fork -members 12, 13 is somewhat displaced from the position shown in Figure 4, at the same time as fork member 13 has been telescopically extended causing the outer buoyancy means 29 -to diverge outwards relative to the inner buoyancy means 28 in stead of being positioned in parallel with said means 28.
In this manner dock 27 is provided with a wider inlet opening -~
60 for pickup vessel 52. As soon as pickup vessel 52-has been moved into dock 27 hoisting operations may begin, if desired, with previous or simultaneous parallel positioning of the buoyancy means by retraction of the telescopic fork member 13. -: ~ :. : .
As shown in Figure 13, spreader yokes (30,31) are designed as rigid members, e.g. a steel rod 61 being cemented in a suitable fender material 62. Ropes 40 pass freely through half links 63 secured to the spreader yoke, as shown. Due to the fact that ropes 40 are continuous, and are only secured to spreader yoke~31 for the spreading effect, the main weight will be absorbed by the ropes, permitting reduced dimensions of the spreader yoke.
c ~ The new device may, advantageously, be winterized.
I All~ ~winches 18, and hawser drums, and pulleys may, thus, advantageously be mounted inside the crane, and hawsers 19-22 may extend inside the crane booms 12,13. By supplying hot air, either directly -from the engine room of the~ship, or by having a hot air blower (not shown) placed I
- 9 1 3 ~ 6 ~
_ inside the crane proper, the device will be operationally independent of the ambient temperature. --' ,' '', :' -:'-, '
Claims (11)
1. A device for launching and hoisting aboard a lifeboat, pickup vessel, etc., and for rescuing people and objects floating in the sea, comprising two booms (12, 13) from hawsers (19-22) extend to two elongated buoyancy means (28, 29), which are mutually connected at a mutual distance, and which are connected with said hawsers via spreader yokes (30, 31) from which rope (40) extend to the buoyancy means, and bottom members (43) which span the space between buoyancy means and are in the water when said buoyancy means are afloat on the water, said ropes (40) extending in guides on the buoyancy means (28, 29) and act as guides for the buoyancy means when latter are afloat on the sea, said ropes (40) being connected with respective adjacent bottom member (43), wherein said two booms (12, 13) are assembled into a fork shaped swing crane boom unit (11, 12, 13), that booms (12, 13) are telescopic (14, 16; 15, 17), and that hawsers (19, 21) extend from the stationary boom sections (14, 15) to a spreader yoke (30) for one buoyancy means (28), whereas hawsers (20, 22) extend from the extendable boom sections (16, 17) to a spreader yoke (31) for the second buoyancy means (29).
2. A device as defined in claim 1, wherein boom unit comprises a rigid fork stem (11) tiltable about a horizontal axis (9) in the ring mount (4, 7) of the crane, and that both fork members (12, 13) are telescopic (14, 16; 15, 17).
3. A device as defined in claim 1 wherein fork members (12, 13) form an obtuse angle with fork stem (11) in the vertical plane.
4. A device as defined in any one of claims 1, 2 or 3, wherein from each end area of the buoyancy means (28) adjacent said crane a control line (53, 54) extends to a suitable winch (55, 56).
5. A device as defined in any one of claims 1, 2 or 3, wherein each spreader yoke (30, 31) is designed as a rigid member cemented in a fender material.
6. A device as defined in any one of claims 1, 2 or 3, wherein from each hawser (19-22) a three-armed rope fork (44, 45) extends to the associated spreader yoke (30, 31).
7. A device as defined in any one of claims 1, 2 or 3, wherein each of the elongated buoyancy means (28, 29) is comprised of a plurality of floats (46) connected in a sequence.
8. A device as defined in any one of claims 1, 2 or 3, wherein bottom members (43) are designed as straps (48) with corresponding lengths of spring steel members (49) being attached (50), with the resulting units cemented in a resilient material (51) which protects both components.
9. A device as defined in claim 8, wherein bottom members (43) are mutually connected with a net (59) stretched between them.
10. A device as defined in any one of claims, 1, 2, 3 or 9 wherein the swing crane (4, 7) is designed with a resting surface (60) with which dock (27) may be brought in contact.
11
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO87871103A NO162184C (en) | 1987-03-18 | 1987-03-18 | DEVELOPMENT AND RECOVERY OF LIVBAAT, PICK-UP BAAT ETC. |
| EP88903414A EP0414679A1 (en) | 1987-03-18 | 1988-04-14 | Device for launching and hoisting up a lifeboat, pick-up boat, etc. |
| PCT/NO1988/000027 WO1989009723A1 (en) | 1987-03-18 | 1988-04-14 | Device for launching and hoisting up a lifeboat, pick-up boat, etc. |
| CA000566022A CA1326614C (en) | 1987-03-18 | 1988-05-05 | Device for launching and hoisting lifeboats, pick-up boats, etc. |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO87871103A NO162184C (en) | 1987-03-18 | 1987-03-18 | DEVELOPMENT AND RECOVERY OF LIVBAAT, PICK-UP BAAT ETC. |
| PCT/NO1988/000027 WO1989009723A1 (en) | 1987-03-18 | 1988-04-14 | Device for launching and hoisting up a lifeboat, pick-up boat, etc. |
| CA000566022A CA1326614C (en) | 1987-03-18 | 1988-05-05 | Device for launching and hoisting lifeboats, pick-up boats, etc. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1326614C true CA1326614C (en) | 1994-02-01 |
Family
ID=42338229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000566022A Expired - Fee Related CA1326614C (en) | 1987-03-18 | 1988-05-05 | Device for launching and hoisting lifeboats, pick-up boats, etc. |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0414679A1 (en) |
| CA (1) | CA1326614C (en) |
| NO (1) | NO162184C (en) |
| WO (1) | WO1989009723A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106043603A (en) * | 2016-07-28 | 2016-10-26 | 林福兴 | Boat receiving rack |
| CN106218818A (en) * | 2016-07-28 | 2016-12-14 | 林福兴 | Automatically ship method is received |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI101871B (en) * | 1996-02-07 | 1998-09-15 | Axelsson Sune | Procedure and arrangement for launching and boarding of floating fabric, respectively |
| SE506365C2 (en) * | 1996-04-22 | 1997-12-08 | Jan Groenstrand | Device for launching and receiving of boats |
| WO2011123816A2 (en) | 2010-04-01 | 2011-10-06 | Par Systems, Inc. | Tensile truss mast |
| WO2014047449A1 (en) * | 2012-09-21 | 2014-03-27 | Par Systems, Inc. | Boat deployment assembly and method |
| NO20161990A1 (en) | 2016-12-15 | 2018-06-18 | Rolls Royce Marine As | Boat transfer system |
| FR3095186B1 (en) | 2019-04-17 | 2021-05-07 | Eca Robotics | System for recovering a surface marine vehicle from a carrier vessel |
| FR3105776A1 (en) * | 2019-12-26 | 2021-07-02 | Thales | Device for recovering a ship from the sea |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1070033A (en) * | 1912-11-20 | 1913-08-12 | Ludger L Heureux | Apparatus for launching ships' boats. |
| US2285590A (en) * | 1940-02-02 | 1942-06-09 | John L Larson | Boat launching device |
| NO140530C (en) * | 1978-01-06 | 1979-09-19 | Aukra Bruk As | PROCEDURE AND DEVICE FOR RELEASE AND COLLECTION OF LIVING BOAT, PICK-UP BOAT, SMALLER SUBMARINE BOAT, AS WELL AS COLLECTION OF PEOPLE AND LOOSE OBJECTS IN THE SEA |
| NO141929C (en) * | 1979-06-08 | 1980-06-04 | Aukra Bruk As | DEVELOPMENT AND RECOVERY OF LIVBAAT, PICK-UP BAAT, MINOR UNDERWATER, AND COLLECTION OF PEOPLE AND LOOSE OBJECTS IN THE SEA |
| EP0130665B1 (en) * | 1983-04-28 | 1987-07-22 | Mobil Oil Corporation | Method and device for rescuing personnel from waters |
-
1987
- 1987-03-18 NO NO87871103A patent/NO162184C/en unknown
-
1988
- 1988-04-14 WO PCT/NO1988/000027 patent/WO1989009723A1/en not_active Application Discontinuation
- 1988-04-14 EP EP88903414A patent/EP0414679A1/en not_active Ceased
- 1988-05-05 CA CA000566022A patent/CA1326614C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106043603A (en) * | 2016-07-28 | 2016-10-26 | 林福兴 | Boat receiving rack |
| CN106218818A (en) * | 2016-07-28 | 2016-12-14 | 林福兴 | Automatically ship method is received |
| CN106043603B (en) * | 2016-07-28 | 2018-03-06 | 林福兴 | Receive keel block |
Also Published As
| Publication number | Publication date |
|---|---|
| NO871103L (en) | 1988-10-10 |
| NO162184B (en) | 1989-08-14 |
| NO162184C (en) | 1989-11-22 |
| WO1989009723A1 (en) | 1989-10-19 |
| NO871103D0 (en) | 1987-03-18 |
| EP0414679A1 (en) | 1991-03-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |