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US3601941A - Ground anchor - Google Patents

Ground anchor Download PDF

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Publication number
US3601941A
US3601941A US848570A US3601941DA US3601941A US 3601941 A US3601941 A US 3601941A US 848570 A US848570 A US 848570A US 3601941D A US3601941D A US 3601941DA US 3601941 A US3601941 A US 3601941A
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Prior art keywords
plate
resistance
plates
edge
ground
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Expired - Lifetime
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US848570A
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English (en)
Inventor
Hikoitsu Watanabe
Sanoi Genma
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Individual
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Individual
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Priority claimed from JP8692468A external-priority patent/JPS4832446B1/ja
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/20—Side-supporting means therefor, e.g. using guy ropes or struts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E02D5/803—Ground anchors with pivotable anchoring members

Definitions

  • a ground anchor includes a plurality of resistance plates hingedly connected with one another in order to slantly drive them from a predetermined depth so that they are set in such a manner that their maximum effective bearing or resisting surfaces may be easily directed substantially toward the direction of the tension force applied thereto.
  • These resistance plates are held stationarily colinear or coplanar, until they reach the predetermined setting depth, by a regulating or retaining member and the force applied to the regulating member for securely holding these resistance plates in said stationary and coplanar state is released when they reach the predetermined depth from the ground surface, whereby they are slantly driven into the soil in desired directions.
  • the present invention relates to a ground anchor for retaining one end of a guy element which is used for reinforcing a supporting structure such as a pole, an antenna or the like.
  • a conventional anchor of the type described is generally comprised of a rectangular steel resistance plate having its leading edge sharpened and a guy rod pivotably mounted upon the upper surface of the steel plate.
  • the anchor is set to a predetermined depth into the soil by driving the anchor in direction of the tension which is applied to the resistance plate. Thereafter, the resistance plate is'pulled back toward the ground surface via the guy rod so that the resistance plate may be rotated through an angle of 90 whereby the maximum effective soil bearing or resisting surface of the resistant plate may be directed substantially at a right angle with respect to said direction of the tension.
  • the resistance plate is curved so that it may be slantly driven into the soil, whereby The maximum effective soil resisting surface of the plate may be directed toward said direction of tension.
  • the resistance plate when the resistance plate is rotated via the guy rod upon completion of the driving operation, it is possible to do so only when the resistance applied to the resistance plate being rotated is less.
  • the resistance plate may be rotated to a desired direction as described above only in theory namely when located in air or fluid.
  • the soil resistance applied to the resistance plate is extremely high so that the latter cannot be rotated smoothly to a desired direction. This presents an especially serious problem when the dimensions of the resistance plate are made large in order to provide a strong resistance against strong pull. Consequently, it is almost impossible to rotate a large-sized resistance plate in the soil because of the strong soil resistance encountered as described above.
  • the primary object of the present invention is to provide a novel ground anchor which completely or at least substantially eliminates the above described defects encountered in case of the conventional ground anchor.
  • the resistance plate of the ground anchor is comprised of a plurality of smallsized resistance plates which can be easily driven slantly and which are hingedly connected with one another is such a manner that they may be inclined inwardly with respect to each other within a predetermined angle of inclination, whereby they can together provide the maximum effective resisting surface which can otherwise be provided only by one large-sized resistance plate.
  • the resistance plates may be locked together stationarily in one coplanar straight block by means of a regulating or retaining plate, so that they can be easily driven straight into the ground to a predetermined depth.
  • the locking arrangement can be released from the ground surface so the that the resistance plates may be slantly driven after having reached said predetermined depth.
  • the resistance plates following the first or leading resistance plate can easily follow the passage formed by the leading resistance plate without themselves forming any cavity in the soil, because they are hingedly connected as described above, whereby these resistance plates can be set in the soil with their respective soil bearing or resisting surface being substantially directed at right angles to the direction of the pull.
  • a ground anchor which can be easily and accurately driven into the soil and will provide a sufficient soil resistance against strong pull may be provided.
  • FIG. l is a front view of one embodiment of a ground anchor according to the present invention.
  • FIG. 2 is a side view thereof
  • FIG. 3 is a detailed exploded view of a first and a second resistance plates thereof
  • FIG. d to h are for explanation of the driving steps of the anchor of the first embodiment
  • FIG. 9 is a side view of another embodiment of a ground anchor including three resistance plates,
  • FIG. It is a front view of a still another embodiment of the present invention.
  • FIG. II is a side view thereof
  • FIGS. 12 to 116 are for explanation of driving steps thereof
  • FIG. II is a side view thereof
  • FIGS. 12 to 116 are for explanation of driving steps thereof
  • FIG. i7 is a side view of a further embodiment of the present invention including three resistance plates.
  • FIGS. I and 2 are front and side views of an anchor generally indicated in its entirety by reference numeral 20, which comprises a first resistance plate 22 having the configuration of a pentagon and having a sharp leading edge 211 which serves as a driving edge, a second resistance plate 23 disposed in succession with the first resistance plate 22 and having the configuration of a rectangle, a regulating plate 241 which serves as a link for connecting the first and second resistance resistance plates 22 and 23, and a guy plate 25 and a connecting rod 26.
  • a notch 27 At the trailing or upper edge of the first resistance plate 22 is formed a notch 27, as shown in FIG. 3 having a pair of slots 28 substantially symmetrical reference to the longitudinal axis of the resistance plate 22.
  • a pair of slots 29 are formed in the leading or lower edge of the second resistance plate 22 in opposed relation with the pair of slots 2% of the first resistance plate 22. llnto the slots 29 are fitted the base portions of connecting and stopping plates 30 which are securely fixed to the second resistance plate 23 by welding or the like in such a manner that the connecting plates 3i) are at right angles rela tive to the plate 23.
  • a shaft 31 is rotatably received between these plates 30 in the vicinity of the leading ends thereof.
  • This shaft 31 is disposed within the notch 27 of the first resistance plate 22 and is securely joined thereto by welding or the like. Therefore, the first and second resistance plates 22 and 23 are joined with each other in such a manner that they may rotate Thus, it will be seen that each of the plates 30 welded to the second resistance plate 23 is colinear with its corresponding stop plate 32 welded to the first resistance plate 22.
  • each connection plate 30 is rounded so as to have an arc whose center coincides with the axis of the shaft 31.
  • each of the stop plates 32 has an arcuate notch 34 to mate with the arcuate end 33 of the connection plate 30. Therefore, when the first and second resistance plates are interconnected with each other as described hereinabove, the ends 33 of the plates 30 may be permitted to move in contact with the notches 34 of the stop plates 32 when the first and second resistance plates 22 and 23 are rotated with respect to each other in a manner as described above.
  • An outer branch 35 of each of the stop plates 32 is so designed that the arm 35 rides over the shaft 31 and then contacts with the outer surface of the plate 30 when both of the resistance plates 22 and 23 are coplanar, while an inner arm 34 of the stop plate 32 terminates at a suitable point below the shaft 31, that is a point of the end 33 of the plate 30, as best shown in FIG. 2.
  • a permissible range of angle of rotation of the first resistance plate 22 in the direction indicated by the arrow (ll) is determined by the point where the inner arm 36 of the stop plate 32 leaves the end 33 of the connection plate 30. in other words, the range is determined by the length of the inner arm 36, thereby limiting an angle of inclination between the first and second resistance plates 22 and 23.
  • a cross-shaped portion 37 the vertical slot of which is colinear with the longitudinal axis of the second resistance plate 23.
  • a rotary plate 38 whose construction is substantially similar to that of the plate 30 welded to the leading edge of the second resistance plate 23.
  • a shaft 39 which in turn is disposed in the horizontal portion of the cross-shaped slot 37 and welded thereto integral therewith, so that the rotary plate 38 may rotate about the shaft 39 with respect to the second resistance plate 23.
  • the leading edge of the rotary plate 38 has the configuration of an arc whose center coincides with the axis of the shaft 39.
  • a stop plate 41 having a construction substantially similar to the stop plate 32 mounted upon the first resistance plate 22, is also attached upon a second resistance plate in the cross-shaped slot 37 in the similar manner as described above.
  • the stop plate 41 has an arcuate notch 42 which mates with the arcuate end 40 of the rotary plate 38 and an outer arm 43 of the stop plate 41 is made longer than an inner arm thereof in order to limit the angle of rotation of the rotary plate 38 with respect to the second resistance plate 23 in a similar manner as described above with reference to the joint between the first and second resistance plates 22 and 23.
  • a slit 45 extending inwardly from the trailing edge of the plate 38 and into this slit 45 is fitted the base portion of a threaded rod 46 which is fixedly joined to plate 38 by welding or the like, so as to be integral with the rotary plate 38.
  • a bracket 47 is integrally joined to the first resistance plate 22 along the longitudinal axis thereof at a right angle with respect thereto by welding or the like, and one end of the regulating plate 24 is pivoted to the leading end of the bracket 47 by means of a pin 48.
  • the length of the regulating plate 24 is so determined that when the first and second resistance plates 22 and 23 are held coplanar (in the same plane), the upper end portion of the regulating plate 24 abuts against the upper (or trailing) end portion of the rotary plate 38 in the same plane. in order to facilitate this abutment and to prevent the separation between the rotary plate 38 and the regulating plate 24 after they are abutted against each other.
  • bifurcated catch pawls 49 are securely pivotably fixed to the inner side edge of the rotary plate 38 so that the regulating plate 24 may be readily engaged and clamped by the catches 49.
  • the clamping force of the catches 49 must be such that when the strong external force is applied to the regulating plate 24, the latter must be easily released from these catches 49.
  • the above described arrangement in which the upper end portion of the regulating plate 24 is firmly pressed against the upper end portion of the rotary plate 38 in the same plane when the first and second resistance plates 22 and 23 are stationarily held coplanar, serves to prevent the regulating plate 24 from being moved away from the rotary plate 38 when an external force is applied to the upperend of the regulating plate 24 by a driving rod 50 whose lower end is in screwthreaded engagement with the threaded rod 46 of the rotary plate 38.
  • the provision of the catches 49 serves to clamp the regulating plate 24 to the rotary plate 38 so that the first and second resistance plates 22 and 23 may be held coplanar when the driving rod 50 is threaded together with the threaded rod 46 of the rotary plate 38.
  • the construction of the catches 49 which readily release the regulating plate 24 when the external force is applied thereto, serves to easily move the regulating plate away from the rotary plate 38 when the external pressure applied to the upper end of the regulating plate 24 is released by unscrewing the driving rod 50 from the threaded rod 46, and thereafter the driving force is applied to the regulating plate 24.
  • the guy plate 25 is pivotably connected at a position adjacent to the center of the regulating plate 24 by means of a pin 51', the other end of the guy plate 25 there is securely fixed the lower end of a guy rod 52 by welding or the like.
  • the connecting pin 5! between the regulating plate 24 and the guy plate 25 is interconnected with the shafl 39 joining the rotary plate 38 with the second resistance plate 23, by means of the connecting rod 26 having an elongated slot 53 formed along the longitudinal axis thereof. Both of the connecting pin 51 and the shafl 39 are fitted into the elongated slot 53 so that this connecting rod 26 serves to prevent the connecting pin 51 and the shaft 39 from being spaced apart from each other beyond a predetermined distance.
  • both the first and second resistance plates 22 and 23 may be easily driven into the ground in such a manner that these plates 22 and 23 are directed substantially at right angles with respect to the direction in which the tensile or pulling force is later to be applied. Furthermore, when the anchor is driven into the ground the formation of cavities around the resistance plates can minimized, whereby sufficient force to resist the tensile force can be provided.
  • the driving rod 50 has at its lower end an internally threaded hole M for threadable engagement with the externally threaded rod Firstly, the first and second resistance plates 22 and 23 are arranged in coplanar position and the upper end portion of the regulating plate 23 is clamped by the catches 49 of the rotary plate 38. Thereafter, the jntemally threaded hole 54 is screwed onto the threaded rod as of the rotary plate 33 so that the lower end of the driving rod 50 contacts with both of the upper ends of the rotary plate 38 and the regulating plate 24 as best shown in FIG. d.
  • the regulating plate 24 is firmly held against the rotary plate 33.
  • the driving rod 50 is assembled with the ground anchor of the present invention as described hereinabove, the movement of the first resistance plate 22 is positively restricted by the regulating plate 24 so that the plate 22 will not be permitted to rotate or incline inwardly (the direction indicated by the arrow ll).
  • the ground anchor mounted to the driving rod 30 is held vertically in such a manner that the driving edge 211 of the first resistance plate 22 is located at a driving position upon the ground. Thereafter, the driving force or impact is applied to the upper end of the driving rod 5050 that the whole assembly is driven straight into, the soil. Once the anchor is driven into a predetermined setting depth, the driving operation is stopped temporarily. Then, as shown in FIG. 3, the driving rod 50 is unscrewed to some extent from the threaded rod 46, thereby moving the lower end of the driving rod away from the upper end of the regulating plate 2 3.
  • the driving operation is restarted.
  • the guy plate as, the guy rod 52, the connecting rod 2s, etc. stronger resistance is applied to the inner surface of the first resistance plate 22 so that the latter longer can be driven straight into the soil. Consequently, as shown in H6. b the first resistance plate 22 is forced to inwardly incline or rotate about the shaft 31 end now becomes driven slantly into the soil.
  • the second resistance plate 23 is inwardly rotated or inclined about the shaft 39 and is driven along the driven passage of the first resistance plate 22.
  • both of the first and second resistance plates 22 and 23 are slantly driven further into the soil with the angle between the plates being maintained and finally, as shown in FIG. 7, they are set in the soil in such a manner that their inner (upper) soil bearing surfaces are suitably inclined with respect to each other and to the direction along whichthe tensile force is applied thereto.
  • the driving rod 30 is completely unscrewed from the threaded rod iti and is pulled out so that only the anchor 20 is completely set in the soil as shown in H0. 3.
  • the anchor 20 as now set is comprised of the first resistance plate 22 whose leading edge is the point of application of force from the regulating plate the second resistance plate 23 whose trailing edge is the point of application of force from the connection plates as and the regulating plate and the connecting rod as integrally joined together by means of the guy plate 25. Therefore, the joint, that is the pin 51 connecting the regulating plate M and the connecting rod 26 with the guy plate 25, becomes the overall point of application of force of the anchor structure 20 of the present invention.
  • the anchor 20 can provide sufificiently strong and reliable resistance against the tensile force applied thereto.
  • the anchor 20 has been shown as having only two resistance plates 22 and 23. but it is to be understood that as shown in F16. 9 the anchor 20 may includes resistance plates 22, 23 and 23s or more than four resistance plates if required.
  • the driving rod Slit intersects with the regulating plate M as shown in F l6. 7. The reason is that the driving rod 30 is made of a round bar while the regulating plate 2d, bears upon it so that when the driving rod 30 is forced into the soil after it engages the regulating plate 22, the latter is forced outwardly along the surface of the driving rod 5h so that they may be easily crossed with each other.
  • the impact applied to the driving rod 50 is transmitted to the first and second resistance plates 22 and 23 through the threaded rod as of the rotary plate 3%. Therefore, when the driving rod 3 is partially unscrewed from the threaded rod as to some extent in order to move the lower end of the driving rod 50 away from the upper end of the regulating plate 24), and when the stronger impact is applied to the threaded rod as if required, excess force will be applied to the connection between the threaded rod as and the driving rod 50 so that there is a danger that the connection might be broken. Therefore, if the :soil conditions require a stronger driving force, it is preferable to utilize the second em bodiment shown in H68. 9 and 1141).
  • a ground anchor is comprised of a first resistance plate 1122 having the configuration of a pentagon and a sharp-pointed driving edge 112i, :1 second re sistance plate 1123 having the configuration of a rectangle, and being disposed immediately after the first resistance plate 122, a connecting plate 1124 serving as a link between the first and second resistance plates 1122 and 1123, a guy plate and a connecting rod 126.
  • the first and second resisting plates 1122 and R23 are hingedly joined in such a manner that a connecting and stopping plate 11311) is fitted into and welded to slot formed at the leading edge of the second resistance plate 1123 and a shaft which is rotatably carried at a position adjacent to the leading (lower) end of the connecting plate 113i) is fitted into and welded to a notch formed at the trailing (upper) edge of the first resistance plate 222.
  • the second resistance plate 1123 and a rotary plate 1138 are hingedly connected with each other by fitting into and welding to the lateral portion of a cross-shaped slot formed at the trailing (upper) edge of the second resistance plate a shaft 139 which is rotatably carried at a position adjacent to the leading (lower) end of the rotary plate 1133.
  • the above described single connecting plate 113i) is disposed along the longitudinal axis of the first and second resistance plates 1122 and 1123 contrary to the first embodiment, but it is to be understood that more than one connecting plate 1130 may be used in the second embodiment if required; depending upon the dimensions of the first and. second resistance plates T22 and 123.
  • stop plates i132 are provided also in the second embodiment. That is, as in the case of the first embodiment, slots are formed on opposite sides of the longitudinal (upper) edge thereof and the stop plates 132 are fitted into these slots and welded thereto so as to be integral with the first resistance plate 122.
  • Each of the stop plates 132 has a notch formed at the free end portion thereof.
  • the dimensions and configuration of the outer and inner arms which define the notches are such that the inner side edge of the outer arm 135 is in close contact with the second resistance plate 123 when both of the resistance plates 122 and 123 are locked in the same plane thereby preventing the first resistance plate 122 from rotating or inclining outwardly relative to the second resistance plate 123.
  • the inner side edge of the inner arm 136 is outwardly inclined so as to provide a space between the inner branch 136 and the second resistance plate 123, thereby permitting the inward rotation or inclination of the first resistance plate to some extent relative to the second resistance plate 123. That is, the first resistance plate 122 may be inwardly rotated or inclined relative to the second resistance plate within an angle corresponding to the angle formed between the outer and inner arms 135 and 136, namely the angle of divergence of the notch.
  • the number of connecting plates which hingedly connect the first resistance plate 122 with the second resistance plate 123, the dimensions and configurations of stop plates which restrict the angle of inclination and the direction of inclination of the first resistance plate 122 with respect to the second resistance plate 123; are different but it will be seen that they may be suitably selected depending upon, for example, the configurations and dimensions of the resistance plates, the impact applied to the driving rod, the soil conditions, etc.
  • a bracket 147 is securely attached to the inner surface of the first resistance plate 122 along the longitudinal axis thereof by welding or the like.
  • a connecting plate 124 has its one end pivotably connected to the free end of the bracket 147 through a pin 148.
  • the other end of the connecting plate 124 is pivotably connected to the lower end of the guy plate 125 via a pin 151.
  • the pin 151 is located substantially at the center of the whole resistance bearing surface of the first and second resistance plates 122 and 123.
  • the upper end of the guy plate 125 is made integral with a guide tube 155 into which is slidably and rotatably fitted the guy rod 152.
  • the guy rod 152 has a stop ring 156 disposed at the upper end of the guide tube 155 and an engaging ring 157 spaced apart form the lower end of the guide tube 155 so that the range of the slidable movement of the guy rod 152 may be restricted.
  • the lower end portion of the guy rod is externally threaded as shown by 158 and can be screwed into a nut 159 which is securely fixed to the inner surface of the rotary plate.138 by welding or the like.
  • the stop ring 156 carried by the guy rod 152 is forcibly pressed against the upper end of the guide tube 155.
  • One end of the connecting rod 126 is rotatably carried by the pin 151 which connects the connecting plate 124 and the guy plate 125, while the other end thereof is rotatably carried by the shaft 139 of the rotary plate 138.
  • the connecting rod 126 has its other end rotatably carried by the shaft 139 before this shaft is fitted into the cross-shaped slot formed in the trailing (upper) edge of the second resistance plate 123 and welded thereto.
  • a stopper l60 is attached to the bracket 147 and 160 abuts against one side edge of the connecting plate 124 so as to determine the minimum angle of inclination of the plate 124 relative to the bracket 147.
  • Another stopper 161 is attached to he guy plate 125 so as to abut against the upper side edge of the connecting rod 126, thereby determining the minimum angle of inclination of the connecting rod 126 relative to the guy plate 125.
  • These stoppers 160 and 161 are adapted to be pressed against the connecting plate 124 and the connecting rod 126. respectively, so as to hold them in position when the lower end of the guy rod 152 is screwed into the nut 159 to the full extent.
  • An engaging rod 146 is fitted into a hole formed in the trailing driving rod 150 is screwed into the nut 159 to the full extent so that the upper end of the guide tube 155 is pressed by the stop ring 156 of the guy'rod 152 and the stopper 161 of the guy plate 125 presses against the connecting rod 126, whereby the guy plate 125, the rotary plate 138 and the connecting rod 126 are held in unison through the guy rod 152.
  • the stopper 160 of the bracket 147 is pressed against the connecting plate 124 toward the first resistance plate 122 about the pin 148 can be positively prevented.
  • the rotation of the connecting plate 124 in the other direction (that is the direction away from the first resistance plate 122) can be also prevented because the connecting rod 126 interconnected to the plate 124 is prevented from the rotation by the stopper 161 of the guy plate 125. Consequently, the first and second resistance plates 122 and 123, the rotary plate 138, the guy plate 125 and other movable element of the anchor 120 are all locked stationarily in union.
  • the engaging hole 154 of the driving rod 150 is fitted over the engaging rod 146 extending from the trailing (upper) edge of the rotary plate 138, and then the assembly of the driving rod 150 and the anchor 120 is vertically held in position on the ground with the leading or driving edge 121 of the first resistance plate 122 being directed to the setting position.
  • the impact is applied to the upper end of the driving rod 150 by any suitable manner known in the art, then both of the first and second resistance plates which are held in coplanar relation as described above are driven straight into the soil.
  • the driving operation is temporarily stopped and the guy rod 152 is rotated so as to disengage the externally threaded lower end portion 158 from the nut 159 of the rotary plate 138. Then, all of the movable elements of the anchor 120 are unlocked from each other and become free to move independently within the ranges determined by their relations with one another. In this state, the driving operation is restarted. Then, because of the soil resistance acting upon the plates 147, 124, 125 and the connecting rod 126, the first resistance plate 122 is caused to advance inwardly slantly into the soil and the second resistance plate 123 follows the passage formed by the first resistance plate 122.
  • both of the resistance plates 122 and 123 are set in the soil as shown in FIG. 15. It is seen that in this state the soil bearing or resistant surface of both plates 122 and 123 are satisfactorily directed toward the direction along which the tensile force is applied thereto. Then, the driving operation is stopped and the driving rod 150 is pulled out of the soil whereby the anchor 120 will be set in the soil as shown in H0. 16.
  • the anchor 120 has been described and illustrated as being comprised of only two resistance plates 122 and 123, but it is to be understood that the anchor may include four resistance plates 122, 123, 123a and 123b hingedly connected with one another as shown in the third embodiment of FIG. 17, or may include more than four resistance plates if required.
  • the present invention has been described with particular reference to some preferred embodiments thereof, but it is to be understood that variations and modifications can be effected without departing from the spirit of the present invention as described hereinabove and as defined in the appended claims.
  • a ground anchor comprising in combination, a first resistance plate having a leading edge adapted to be driven into the ground, and a trailing edge: at least one second resistance plate downstream of said trailing edge and having a front edge and a rear edge;
  • connecting means pivotably connecting said trailing edge with said front edge for relative pivotal movement of said plates about a pivot axis extending transverse to the direction in which said leading edge is to be driven into the ground;
  • releasable locking means for locking said plates in coplanar relationship, including a bracket spanning said plates and having opposite end portions pivoted to said leading edge and said rear edge, respectively;
  • limiting means in part pivoted to said second resistance plate and to a predetermined portion of said bracket for enabling limited angular displacement of said plates with reference to one another in one direction about said pivot axis, upon release of said locking means;
  • a ground anchor as defined in claim ll said locking means comprising a rotary element having one end portion connected with said second plate, and a threaded free end portion adapted for threaded engagement with a driving rod for driving said ground anchor into the ground.
  • said connecting means comprising at least one connecting plate secured to said front edge and having an arcuate free portion projecting beyond said front edge and with freedom of pivotal displacement into a corresponding slot at said trailing edge, and a shaft carried by said free portion and fast with said trailing edge.
  • said limiting means further including at least one bifurcated limiting member partially received in said slot and having a longer and a shorter arm located at opposite major surfaces of said first plate and defining between themselves an arcuate recess into which said arcuate free end extends, said arms engaging said plates and preventing relative angular displacement thereof other than said limited angular displacement.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)
US848570A 1968-11-29 1969-08-08 Ground anchor Expired - Lifetime US3601941A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8692468A JPS4832446B1 (de) 1968-11-29 1968-11-29
JP1223969 1969-02-14

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US3601941A true US3601941A (en) 1971-08-31

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US848570A Expired - Lifetime US3601941A (en) 1968-11-29 1969-08-08 Ground anchor

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US (1) US3601941A (de)
DE (1) DE1927087A1 (de)
FR (1) FR2024458A1 (de)
GB (1) GB1240940A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662505A (en) * 1969-11-10 1972-05-16 Hikoitsu Watanabe Ground anchor
US3785100A (en) * 1971-05-10 1974-01-15 H Watanabe Ground anchor
US5987811A (en) * 1998-07-30 1999-11-23 Wiesener; Mark Device for the fixing of bait stations at ground level
EP1243701A2 (de) * 2001-03-18 2002-09-25 Necks Electric Holding AB Erdverankerungseinrichtung für Spannseile
US20080276549A1 (en) * 2007-05-11 2008-11-13 Mark Turley Ground Anchor System
NL2002773C2 (nl) * 2009-04-21 2010-10-22 Kloosterman Waterbouw Ankerdrijver en werkwijze voor het gebruik daarvan.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1145204A (en) * 1978-02-28 1983-04-26 Roger C. Harvey Embeddable anchor and to a method of embedding such anchors
GB2353016B (en) * 2000-07-12 2001-07-04 James William Bunce Anchor system
CN108385680B (zh) * 2018-02-14 2020-09-25 上海城建职业学院 结构稳定型的抗拉锚固装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1955902A (en) * 1931-03-21 1934-04-24 Arthur B Bullard Anchoring device
US2029740A (en) * 1935-01-04 1936-02-04 Gen Outdoor Advertising Co Inc Earth anchor
US2705548A (en) * 1951-07-27 1955-04-05 Lionberger Jack Fence post anchor means
US2784815A (en) * 1954-02-23 1957-03-12 Larson Arthur Anchor
US2973065A (en) * 1955-07-22 1961-02-28 William J Cordes Earth anchor
US3282002A (en) * 1963-12-19 1966-11-01 Taylor H Jefferson Keying device for embedment anchor
US3411253A (en) * 1965-10-28 1968-11-19 Watanabe Hikoitsu Strain anchor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1955902A (en) * 1931-03-21 1934-04-24 Arthur B Bullard Anchoring device
US2029740A (en) * 1935-01-04 1936-02-04 Gen Outdoor Advertising Co Inc Earth anchor
US2705548A (en) * 1951-07-27 1955-04-05 Lionberger Jack Fence post anchor means
US2784815A (en) * 1954-02-23 1957-03-12 Larson Arthur Anchor
US2973065A (en) * 1955-07-22 1961-02-28 William J Cordes Earth anchor
US3282002A (en) * 1963-12-19 1966-11-01 Taylor H Jefferson Keying device for embedment anchor
US3411253A (en) * 1965-10-28 1968-11-19 Watanabe Hikoitsu Strain anchor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662505A (en) * 1969-11-10 1972-05-16 Hikoitsu Watanabe Ground anchor
US3785100A (en) * 1971-05-10 1974-01-15 H Watanabe Ground anchor
US5987811A (en) * 1998-07-30 1999-11-23 Wiesener; Mark Device for the fixing of bait stations at ground level
EP1243701A2 (de) * 2001-03-18 2002-09-25 Necks Electric Holding AB Erdverankerungseinrichtung für Spannseile
EP1243701A3 (de) * 2001-03-18 2003-04-02 Necks Electric Holding AB Erdverankerungseinrichtung für Spannseile
US20080276549A1 (en) * 2007-05-11 2008-11-13 Mark Turley Ground Anchor System
US7624545B2 (en) * 2007-05-11 2009-12-01 Mark Turley Ground anchor system
NL2002773C2 (nl) * 2009-04-21 2010-10-22 Kloosterman Waterbouw Ankerdrijver en werkwijze voor het gebruik daarvan.

Also Published As

Publication number Publication date
GB1240940A (en) 1971-07-28
FR2024458A1 (de) 1970-08-28
DE1927087A1 (de) 1970-06-25

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