CA2269438A1 - Improvement in the structure of a safety syringe - Google Patents
Improvement in the structure of a safety syringe Download PDFInfo
- Publication number
- CA2269438A1 CA2269438A1 CA002269438A CA2269438A CA2269438A1 CA 2269438 A1 CA2269438 A1 CA 2269438A1 CA 002269438 A CA002269438 A CA 002269438A CA 2269438 A CA2269438 A CA 2269438A CA 2269438 A1 CA2269438 A1 CA 2269438A1
- Authority
- CA
- Canada
- Prior art keywords
- needle
- protruded
- neck
- mounting neck
- wall
- 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.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M2005/3103—Leak prevention means for distal end of syringes, i.e. syringe end for mounting a needle
- A61M2005/3106—Plugs for syringes without needle
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
- A61M5/31515—Connection of piston with piston rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3202—Devices for protection of the needle before use, e.g. caps
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Environmental & Geological Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Accommodation For Nursing Or Treatment Tables (AREA)
Abstract
A safety syringe includes a tubular container having an end formed with a protruded needle mounting neck and another end formed with a holding flange, an injection rod having a cross-shaped figure and an end provided with a round disc, another end of the injection rod having a dovetailed groove, a piston head having a bottom formed with a dovetailed projection engageable with the dovetailed groove and a top provided with a mushroom head, a needle having an end formed with a slantly cut injection hole and another externally threaded cylindrical mounting end engaged with the needle mounting neck, the needle mounting neck having a protruded block above the cylindrical mounting end, the protruded block having a fibre made up of vertical planes, each of the planes having a lug extending from an upper end thereof, a sleeve having an inner protruded wall and threads above the wall, the sleeve being fitted in the needle mounting neck and threadedly engaged with the externally threaded cylindrical mounting end of the needle, and a needle receiving tube, whereby accidental sticks can be effectively avoided.
Description
TITLE: IIuVIPROVEMENT IN THE STRUCTURE OF A SAFETY
SYRINGE -1. Field of the Invention This invention is related to an improvement in the structure of a safety syringe.
SYRINGE -1. Field of the Invention This invention is related to an improvement in the structure of a safety syringe.
2. Description of the Prior Art There have been many hospital related personnel suffering from fatal contagion of various diseased as a result of accidentally punctured by disposed needles, such as AIDS, TB and diseases of the like, which are distn'buted via blood So, it is a life and death matter for doctors and nurses to deal with disposed needles within hospitals and clinics.
To better protect hospital personnel from being fatally punctured by disposed needles, a number of safety syringes have been designed and marketed for many years. The most common safety syringes on markets are made up of more than 4 pieces, causing the production cost of syringes to increase in one aspect and to burden the natural environment when disposed without processing in another aspect. So, it is not popularly used at all.
Furthermore, another type of safety syringe as illustrated in Figs. 6 and 7, such a prior art safety syringe is made up of a tubular container 1, an injection rod 2, a needle 3 and a needle cover (not shown). The W bular container 1 has a needle mount 10 for the retaining of the needle 3 at one end and has an oval shaped stop flange 11 at the other end. A limiting plate 12 having a retaining recess 13 at its edge extends from one side of the stop flange 11.
The injection rod 2 having a cross-shaped section is slidably housed in the tubular container 1. At the front end of the injection rod 2 is disposed a piston end 20 having a mushroom-shaped retaining piece 21 at one end and at the other end of the injection rod 2 is disposed a circular disk 22. On trvo opposite points of the periphery of the circular disk 22 are disposed a retaining piece 23 respectively which is engaged with the retaining recess 13 of the limiting plate 12 of the tubular container 1.
The needle 3 has a slantly cut puncturing end 30 and the other end of the needle 3 has an outerly threaded W be 31 having a pair of opposite openings on the wall thereof. There are rivo slant retaining claws 32a, 32b housed in the 1 ~ threaded tube 3 l and extending from the edge of the openings respectively, as shown in FIG. 1, so as to permit the mmhroom shaped retaining piece 21 to be locked in place by the retaining claws 32a 32b. The slant angles of the retaining claws 32a, 32b are not identical. When the injection rod 2 is pulled backward, the needle 3 can be withdrawn into the tubular container 1 after the needle 3 is rotated to disengage from the needle mount 10. The needle will lean to one side as a result of the difference of the slant angles of the retaining claws 32 when it is pulled into the tubular container 1. Afterwards, the needle mount 10 is closed by the needle cover (not shown) so as to protect hospital personnel from being pricked by disposed needles which are S withdrawn into the tubular container after use.
Such a prior art safety syringe has the following disadvantages in its design and practical use:
1. The needle is easily subject to contamination after it is taken out from its germ free packing by hospital personnel wearing no gloves and exposed to the air.
2. The needle is easily dropped and the exposed needle can get people pricked accidentally 3. The retaining claws are made in a relatively complex manner having too many cuts and corners in which residues produced in a manufacturing process can be hidden and injected into a patient's body via blood vessels, causing unexpected diseases.
To better protect hospital personnel from being fatally punctured by disposed needles, a number of safety syringes have been designed and marketed for many years. The most common safety syringes on markets are made up of more than 4 pieces, causing the production cost of syringes to increase in one aspect and to burden the natural environment when disposed without processing in another aspect. So, it is not popularly used at all.
Furthermore, another type of safety syringe as illustrated in Figs. 6 and 7, such a prior art safety syringe is made up of a tubular container 1, an injection rod 2, a needle 3 and a needle cover (not shown). The W bular container 1 has a needle mount 10 for the retaining of the needle 3 at one end and has an oval shaped stop flange 11 at the other end. A limiting plate 12 having a retaining recess 13 at its edge extends from one side of the stop flange 11.
The injection rod 2 having a cross-shaped section is slidably housed in the tubular container 1. At the front end of the injection rod 2 is disposed a piston end 20 having a mushroom-shaped retaining piece 21 at one end and at the other end of the injection rod 2 is disposed a circular disk 22. On trvo opposite points of the periphery of the circular disk 22 are disposed a retaining piece 23 respectively which is engaged with the retaining recess 13 of the limiting plate 12 of the tubular container 1.
The needle 3 has a slantly cut puncturing end 30 and the other end of the needle 3 has an outerly threaded W be 31 having a pair of opposite openings on the wall thereof. There are rivo slant retaining claws 32a, 32b housed in the 1 ~ threaded tube 3 l and extending from the edge of the openings respectively, as shown in FIG. 1, so as to permit the mmhroom shaped retaining piece 21 to be locked in place by the retaining claws 32a 32b. The slant angles of the retaining claws 32a, 32b are not identical. When the injection rod 2 is pulled backward, the needle 3 can be withdrawn into the tubular container 1 after the needle 3 is rotated to disengage from the needle mount 10. The needle will lean to one side as a result of the difference of the slant angles of the retaining claws 32 when it is pulled into the tubular container 1. Afterwards, the needle mount 10 is closed by the needle cover (not shown) so as to protect hospital personnel from being pricked by disposed needles which are S withdrawn into the tubular container after use.
Such a prior art safety syringe has the following disadvantages in its design and practical use:
1. The needle is easily subject to contamination after it is taken out from its germ free packing by hospital personnel wearing no gloves and exposed to the air.
2. The needle is easily dropped and the exposed needle can get people pricked accidentally 3. The retaining claws are made in a relatively complex manner having too many cuts and corners in which residues produced in a manufacturing process can be hidden and injected into a patient's body via blood vessels, causing unexpected diseases.
4. The injection rod cannot be pushed fully to the bottom end of the W bular container, making medical liqtuds unable to be fully and e~ciently injected into patients' bodies.
5. The W bular container is not provided with slippery proof strips; a person ererting a large force to withdraw the injection rod and get a disposed needle pulled into the tubular container will easily get pricked by a used needle as a result of slippery of his or her hands off the W bular container.
S>JmrINIARY OF THE INVENTION
This invention is related to an improvement in the structure of a safety syringe.
It is the primary object of the present invention to provide an improved safety syringe which can avoid accidental sticks.
It is another object of the present invention to provide an improved safety syringe which is easy to use.
It is still another object of the present invention to provide an improved safety syringe which is simple in construction.
The foregoing objects and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference munerals refer to identical or similar parts. Many other advantages and feariu-es of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred stnictural embodiment incorporating the principles of the present invention is shown by way of illL~strative example.
S>JmrINIARY OF THE INVENTION
This invention is related to an improvement in the structure of a safety syringe.
It is the primary object of the present invention to provide an improved safety syringe which can avoid accidental sticks.
It is another object of the present invention to provide an improved safety syringe which is easy to use.
It is still another object of the present invention to provide an improved safety syringe which is simple in construction.
The foregoing objects and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference munerals refer to identical or similar parts. Many other advantages and feariu-es of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred stnictural embodiment incorporating the principles of the present invention is shown by way of illL~strative example.
BRIEF DESCRIPTION OF TIC DRAWINGS
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a perspective view of the present invention;
FIGS. 3A, 3B, 3C, 4A and 4B illustrates how used needle is withdrawal into the container of the safety syringe according to the present invention;
FIGS. SA and SB illustrates di.$'erent ways to close the tubular container a$er use;
FIG. 6 is an exploded view of a prior art syringe; and FIG. 7 is a sectional view illustrating the operation mode of the prior art syringe.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIrv~NT
For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings. Specific language will be used to descn'be same. It wfll, nevertheless, be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated herein being contemplated as would normally occur to one skilled in the art to which the invention relates.
With reference to the drawings and in particular to FIGS. 1 and 2 thereof, the safety syringe according to the present invention generally comprises a tubular container 5, an injection rod 6, a needle 7 and a needle receiving tube 8.
As shown in FIG. 1, the W boar container 5 is fomned with a protruded 1 S needle mounting neck 50 at the upper end and a holding flange 52 at the lower end. The protruded needle mounting neck 50 has a lid 51 attached to the edge of the needle mounting neck 50 and a threaded inner wall for the securing of the needle 7. A phuality of a<~cially extended anti-slip linear protn~sions 53 are formed on the outer surface of the tubular container S for enabling the tubular container 5 to be held firmly without slip when the injection rod 6 is pulled ourivardly The injection rod 6 has a cross-shaped figure and is provided at the lower end with a round disc 60 for easy operation of the injection rod 6. The upper end of the injection rod 6 is formed with a dovetailed groove 61 engageable with a dovetailed projection 64 provided at the bottom of a piston head 62.
The top of the piston head 62 is formed with a mushroom projection 63 having a slot at the upper end. A sleeve 65 having an inner protruded wall 66 and threads 67 above the wall 66 is engaged with the projection 63 for receiving the needle 7. A packing ring 68 is fitted between the sleeve 65 and the needle 7 for strengthening the engagement therebetVVeen.
The needle 7 has a slantly cut injection hole 70 at one end and another externally threaded cylindrical mounting end 71 which is engaged with the needle mounting neck 50 of the tubular container in assembly The top of the cylindrical mounting end 71 is provided with a protnided block having a 1 ~ cross-shaped figure made up of four vertical planes 72 orthogonal to each other. Each of the vertical planes 72 has a lug 73 extending from the upper end thereof.
The needle receiving hibe 8 has an opened bottom end and a closed top end which is provided with a continuous spiral nb 82 for engagement with the needle mounting neck 50. The outer stu-face of the needle receiving tube 8 is provided with a plurality of longitudinal protrusions 81 for enabling the needle receiving tube 8 to be held firmly without slip. The inner side of the needle receiving tube 8 is provided with protuberances (not shown) for engaging with the lugs 73 of the needle 7 thereby enabling the needle 7 to be fixed in place in the needle receiving tube 8 without moving or shaking randomly.
When in assembly, the sleeve 65 is first fitted in the tubular container S
and then pushed into the neck 50. Then, the needle 7 is inserted in the tubular container 5, with the externally threaded cylindrical mounting end 71 engaged with the threads 67 thereby providing a safety syringe for use.
Referring to FIGS. 3A, 3B, 3C, 4A, 4B, SA and 5B, when the person engaging in the shot is going to dispose the safety syringe after use, he or she will hold the tubular container 5 with the left hand and continues pushing the injection rod 6 with the right hand by way of the round disc 60 so as to engage the mushroom projection 63 of the piston head 62 with the inner protruded 1 S wall 66 of the sleeve 65. Thereafter, the injection rod 6 is pulled ourivardly to withdraw the needle 7 into the hibular container S for disposal. Then, the lid 51 is engaged with the needle moLUiting neck 50 to close the tubular container 5 to prevent the needle 7 from accidentally sticking out of the need mounting neck S0.
It will be understood that each of the elements descn'bed above, or rivo or more together may also find a useful application in other types of methods differing from the type descn'bed above.
While certain novel features of this invention have been shown and descn'bed and are pointed out in the annexed claim, it is not intended to be 5 limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a perspective view of the present invention;
FIGS. 3A, 3B, 3C, 4A and 4B illustrates how used needle is withdrawal into the container of the safety syringe according to the present invention;
FIGS. SA and SB illustrates di.$'erent ways to close the tubular container a$er use;
FIG. 6 is an exploded view of a prior art syringe; and FIG. 7 is a sectional view illustrating the operation mode of the prior art syringe.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIrv~NT
For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings. Specific language will be used to descn'be same. It wfll, nevertheless, be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated herein being contemplated as would normally occur to one skilled in the art to which the invention relates.
With reference to the drawings and in particular to FIGS. 1 and 2 thereof, the safety syringe according to the present invention generally comprises a tubular container 5, an injection rod 6, a needle 7 and a needle receiving tube 8.
As shown in FIG. 1, the W boar container 5 is fomned with a protruded 1 S needle mounting neck 50 at the upper end and a holding flange 52 at the lower end. The protruded needle mounting neck 50 has a lid 51 attached to the edge of the needle mounting neck 50 and a threaded inner wall for the securing of the needle 7. A phuality of a<~cially extended anti-slip linear protn~sions 53 are formed on the outer surface of the tubular container S for enabling the tubular container 5 to be held firmly without slip when the injection rod 6 is pulled ourivardly The injection rod 6 has a cross-shaped figure and is provided at the lower end with a round disc 60 for easy operation of the injection rod 6. The upper end of the injection rod 6 is formed with a dovetailed groove 61 engageable with a dovetailed projection 64 provided at the bottom of a piston head 62.
The top of the piston head 62 is formed with a mushroom projection 63 having a slot at the upper end. A sleeve 65 having an inner protruded wall 66 and threads 67 above the wall 66 is engaged with the projection 63 for receiving the needle 7. A packing ring 68 is fitted between the sleeve 65 and the needle 7 for strengthening the engagement therebetVVeen.
The needle 7 has a slantly cut injection hole 70 at one end and another externally threaded cylindrical mounting end 71 which is engaged with the needle mounting neck 50 of the tubular container in assembly The top of the cylindrical mounting end 71 is provided with a protnided block having a 1 ~ cross-shaped figure made up of four vertical planes 72 orthogonal to each other. Each of the vertical planes 72 has a lug 73 extending from the upper end thereof.
The needle receiving hibe 8 has an opened bottom end and a closed top end which is provided with a continuous spiral nb 82 for engagement with the needle mounting neck 50. The outer stu-face of the needle receiving tube 8 is provided with a plurality of longitudinal protrusions 81 for enabling the needle receiving tube 8 to be held firmly without slip. The inner side of the needle receiving tube 8 is provided with protuberances (not shown) for engaging with the lugs 73 of the needle 7 thereby enabling the needle 7 to be fixed in place in the needle receiving tube 8 without moving or shaking randomly.
When in assembly, the sleeve 65 is first fitted in the tubular container S
and then pushed into the neck 50. Then, the needle 7 is inserted in the tubular container 5, with the externally threaded cylindrical mounting end 71 engaged with the threads 67 thereby providing a safety syringe for use.
Referring to FIGS. 3A, 3B, 3C, 4A, 4B, SA and 5B, when the person engaging in the shot is going to dispose the safety syringe after use, he or she will hold the tubular container 5 with the left hand and continues pushing the injection rod 6 with the right hand by way of the round disc 60 so as to engage the mushroom projection 63 of the piston head 62 with the inner protruded 1 S wall 66 of the sleeve 65. Thereafter, the injection rod 6 is pulled ourivardly to withdraw the needle 7 into the hibular container S for disposal. Then, the lid 51 is engaged with the needle moLUiting neck 50 to close the tubular container 5 to prevent the needle 7 from accidentally sticking out of the need mounting neck S0.
It will be understood that each of the elements descn'bed above, or rivo or more together may also find a useful application in other types of methods differing from the type descn'bed above.
While certain novel features of this invention have been shown and descn'bed and are pointed out in the annexed claim, it is not intended to be 5 limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.
Claims
1. A safety syringe comprising:
a tubular container having an end formed with a protruded needle mounting neck and another end formed with a holding flange, said tubular container having an outer surface formed with axially extended anti-slip protrusions, said protruded needle mounting neck having a lid attached to an edge thereof and a threaded inner wall;
an injection rod having an end provided with a round disc, another end of said injection rod having a dovetailed groove;
a piston head having a bottom formed with a dovetailed projection engageable with said dovetailed groove and a top provided with a mushroom head;
a needle having an end formed with a slantly cut injection hole and another externally threaded cylindrical mounting end engaged with said needle mounting neck, said needle mounting neck having a protruded block above said cylindrical mounting end, said protruded block having a plurality of vertical planes, each of said planes having a lug extending from an upper end thereof;
a sleeve having an inner protruded wall and threads above said wall, said sleeve being fitted in said needle mounting neck and threadedly engaged with said externally threaded cylindrical mounting end of said needle; and a needle receiving tube engageable with said needle mounting neck.
a tubular container having an end formed with a protruded needle mounting neck and another end formed with a holding flange, said tubular container having an outer surface formed with axially extended anti-slip protrusions, said protruded needle mounting neck having a lid attached to an edge thereof and a threaded inner wall;
an injection rod having an end provided with a round disc, another end of said injection rod having a dovetailed groove;
a piston head having a bottom formed with a dovetailed projection engageable with said dovetailed groove and a top provided with a mushroom head;
a needle having an end formed with a slantly cut injection hole and another externally threaded cylindrical mounting end engaged with said needle mounting neck, said needle mounting neck having a protruded block above said cylindrical mounting end, said protruded block having a plurality of vertical planes, each of said planes having a lug extending from an upper end thereof;
a sleeve having an inner protruded wall and threads above said wall, said sleeve being fitted in said needle mounting neck and threadedly engaged with said externally threaded cylindrical mounting end of said needle; and a needle receiving tube engageable with said needle mounting neck.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SG9901874A SG90049A1 (en) | 1999-04-16 | 1999-04-16 | Improvement in the structure of a safety syringe |
| CA002269438A CA2269438A1 (en) | 1999-04-16 | 1999-04-20 | Improvement in the structure of a safety syringe |
| NZ335340A NZ335340A (en) | 1999-04-16 | 1999-04-22 | Safety syringe, injection rod is pulled outwardly to withdraw needle into a tubular container for disposal |
| DE29907462U DE29907462U1 (en) | 1999-04-16 | 1999-04-27 | Improve the structure of a safety syringe |
| BR9901302-9A BR9901302A (en) | 1999-04-16 | 1999-04-27 | Improvement in the structure of a safety syringe |
| CH00846/99A CH693258A5 (en) | 1999-04-16 | 1999-05-05 | Safety syringe has improved structure and does not slip |
| FR9905873A FR2793144B3 (en) | 1999-04-16 | 1999-05-07 | IMPROVED STRUCTURE OF A SAFETY SYRINGE |
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SG9901874A SG90049A1 (en) | 1999-04-16 | 1999-04-16 | Improvement in the structure of a safety syringe |
| CA002269438A CA2269438A1 (en) | 1999-04-16 | 1999-04-20 | Improvement in the structure of a safety syringe |
| NZ335340A NZ335340A (en) | 1999-04-16 | 1999-04-22 | Safety syringe, injection rod is pulled outwardly to withdraw needle into a tubular container for disposal |
| DE29907462U DE29907462U1 (en) | 1999-04-16 | 1999-04-27 | Improve the structure of a safety syringe |
| BR9901302-9A BR9901302A (en) | 1999-04-16 | 1999-04-27 | Improvement in the structure of a safety syringe |
| CH00846/99A CH693258A5 (en) | 1999-04-16 | 1999-05-05 | Safety syringe has improved structure and does not slip |
| FR9905873A FR2793144B3 (en) | 1999-04-16 | 1999-05-07 | IMPROVED STRUCTURE OF A SAFETY SYRINGE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2269438A1 true CA2269438A1 (en) | 2000-10-20 |
Family
ID=32111171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002269438A Abandoned CA2269438A1 (en) | 1999-04-16 | 1999-04-20 | Improvement in the structure of a safety syringe |
Country Status (7)
| Country | Link |
|---|---|
| BR (1) | BR9901302A (en) |
| CA (1) | CA2269438A1 (en) |
| CH (1) | CH693258A5 (en) |
| DE (1) | DE29907462U1 (en) |
| FR (1) | FR2793144B3 (en) |
| NZ (1) | NZ335340A (en) |
| SG (1) | SG90049A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1754499A1 (en) * | 2005-08-19 | 2007-02-21 | Wei-Shui Wu | Safety hypodermic syringe with retractable needle carrier |
| PL3574940T3 (en) * | 2018-06-01 | 2021-04-19 | Industrie Borla S.P.A. | Drip chamber and spike assembly for medical lines |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5273543A (en) * | 1992-12-14 | 1993-12-28 | Becton, Dickinson And Company | Safety needle syringe |
| US5324265A (en) * | 1993-10-20 | 1994-06-28 | Gabbard Murray Gabbard Inc. | Hypodermic safety syringe with retracting needle system |
| US5575774A (en) * | 1995-10-24 | 1996-11-19 | Chen; Long-Hsiung | Structure of safety hypodermic syringe |
-
1999
- 1999-04-16 SG SG9901874A patent/SG90049A1/en unknown
- 1999-04-20 CA CA002269438A patent/CA2269438A1/en not_active Abandoned
- 1999-04-22 NZ NZ335340A patent/NZ335340A/en unknown
- 1999-04-27 DE DE29907462U patent/DE29907462U1/en not_active Expired - Lifetime
- 1999-04-27 BR BR9901302-9A patent/BR9901302A/en unknown
- 1999-05-05 CH CH00846/99A patent/CH693258A5/en not_active IP Right Cessation
- 1999-05-07 FR FR9905873A patent/FR2793144B3/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FR2793144B3 (en) | 2001-03-30 |
| FR2793144A3 (en) | 2000-11-10 |
| SG90049A1 (en) | 2002-07-23 |
| BR9901302A (en) | 2001-01-16 |
| NZ335340A (en) | 2000-09-29 |
| DE29907462U1 (en) | 1999-08-05 |
| CH693258A5 (en) | 2003-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |