US2746414A - Retrievable anchor - Google Patents

Description

May 22, 1956 R. ROBERTS RETRIEVABLE ANCHOR Filed March 26, 1954 INVENTOR Ro BERT ROBERTS ATTORNEYS `vent the 1Vloss of the anchor and the -5 of Figure to a retrievable or releasable anchor.

It is an object of this invention to provide an anchor which can be retrieved should the anchor tines become wedged under rocks or other obstructions and thus prerope or chain that This invention relates' to anchors and more particularly secures the anchor tothe boat.

. It is a further, object of this invention to provide a retrievable or releasable anchor which, upon being wedged in an underwater obstruction, can vbe retrieved from any position in the boat, opposite to the holding position, thereby eliminating danger attendant-to attempting to disnited States Patent O Patented May 22, `1956 ice N t movement of the clevis and the anchor base in their lodge the conventional solid type anchor `from underwater obstructions while in a small boat.

Another and still further object of this invention is to provide a retrievable or releasable anchor in which the several parts thereof may be readily dismantledy for convenience of transportation or for packing` and storage.

p Yet another object of this invention is to provide a retrievable anchor in which the anchor is so constructed that it insures that a fisherman or small boat operator lwill have an anchor that will perform its intended purpose and yet will not become lost due to being wedged "in an underwater obstruction.

` Another and still further object of this invention is the provision of a retrievable anchor wherein the shear pin which breaks when abnormal stress is applied to the anchor can be readily and easily replaced so as to provide and insure the normal functioning of the anchor for further use. j

-Other objects andadvantages will become apparent i `from the following detailed description, forming the speciiication, and taken in conjunctionwith the accompany- Aing drawing, in which:

, v Figure l is a front elevational view of the anchor embodying this invention, being partially broken away;

Figure 2 is a bottomplan view;

`Figure 3` is a side elevational view;

Figure 4 is a vertical cross sectionalfview taken on line 4 4 of Figure l and shownona lsomewhat enlarged scale; and j j Figure 5 is a vertical'cross sectional view taken on line 3 and shown onV a somewhat enlarged scale. t

With continued referenceto the drawings, there's shown an anchor, generally indicated at 10, which comthreads 56.

prises a stem` or shank 12 having adjacent one end thereof an elongated closed slot 14 therethrough for receiving one end of an anchor line or chain, a two-way clevis 16 carried by the stem 12 at the end thereof remote from the end having the slot 14 therethrough for movement in `an arcuate path about fan axis perpendicular tothe stem,

an anchor base, generally indicated at 18 having a plurality of concavo-convex tines 20` extending radially fromY a central body or hub 22 and carried by the two-way clevis 16 adjacent the end thereof remote from the stem 12 for movement in an arcuatepath about an axis perpendicular to the clevis 16 and the stem 12 and at right arcuate paths, thus permitting dislodgement of the an-V chor 10 when it becomes wedged in an underwater obstacle. t

The stern or shank 12 is provided at its end remote from the slot 14 with a longitudinally extending tongue 26 extending along its longitudinal center line and of a lesser thickness than the thickness of the stem 12, and the distal end28 of the tongue is rounded' from `one longitudinal edge thereof to the other. t

The tongue 26 is received between the legs 30 and 32 of the upper U-shaped portion 34 of the two-way clevis and a clevis pin 36 passes through aligned and registering openings through the legs 30 and 32 and the tongue 26 so as to mount the clevis 16 on the stem 12 for movement in an arcuate path about an axis defined bythe centerline of the `transversely extending clevis pin36 which is perpendicular to the longitudinal center line of the stem 12 so that the two-way clevis 16 is carried by the stem 12 for movement in an arcuate path about an axis perpendicular thereto. It should be noted that the radius orrounded end 28 Vofthe tongue 26 has been so formed so'as to permit the movement of the two-way clevis in its arcuate path aboutthe axis provided by the clevis pin 36. The clevis pin 36 has an enlarged circular head 38 at one end which is in.` face to face engagement with the outer side of the leg 30 -and the end of the shank of the clevis pin remote from the head 38 receives thereon a washer 40 adapted to abutagainst the `outer surface of the adjacent side of the leg 32, and the clevispin 36 istprevented from relative longitudinal movement transversely of the upper portion 34 of the clevis' and the tongue 26 by a cotter pin 42 which is receivedin an opening transversely through the shank of the clevis pin 36 adjacent its endremote from the head 38 and closely adjacent the washer 40.

The lower portion 44 is similarly formed to the upper portion 34 of the two-way clevis pin 16 and has a pair of spaced parallel legs 46 and 48 'extending in a direction away from the direction in which the 'legs 30 and 32 extend and disposed in right angular Vrelation thereto. Thus, the lower portion 44 is also U-shaped and receives in the space between the legs 46 and 48 a swivel lug 50 having the terminal end thereofY received in the-space .between the legs rounded from one longitudinal edge thereof to the other so as to define a radius end 52. The lug 50 extends beyond the free ends of the legs 46 and 48 andhas its end 54 provided with external screw A clevis pin 58, similar in all respects to the clevis pin 36, extends transversely through aligned and registered openings through the legs 46 and 48 of the lower portion 44 and through the swivel lug 50 so that the swivel lug is carried by the clevis at the end thereof remote from the stem 12 for movement in an arcuate path about an axis defined by the center line of the clevis pin 58 which is perpendicular to the longitudinal center line through the stem 12 and clevis 16 and at` right angles to the arcuate path of movement of the clevis 16. The clevis` pin 58 is similarly prevented from relative longitudinal movementtransversely of the lower portion 44 of the clevis and the portion of the swivel lug 50 extending within the lower portion of the clevis by a cotter pin 60 received in a suitable transversely extending opening adjacent a washer 62 received on the end of the shank of the clevis pin remote from the enlarged head 64 thereof.

It is appropriate, before discussion of the remaining components of the device, to consider the particular formation of the two-way clevis, since the shape of the clevis is particularly adapted for the reception of the shear pin 24. The clevis includes, medially between opposite ends thereof, a rectangular fiat, connecting or bight portion 65, lying in a plane midway ybetween and paralleling those in whichthe pivot pin-s carried by said clevis extend. The flat connecting portion 65 is of a thickness such as to permit disposition of a substantial part of the length of the shear pin therein, to assure that either end of the shear pin can be broken oft without necessarily involving a breakage of the opposite end thereof. Integral with and projecting upwardly from one pair of opposite side edges of the rectangular connecting ,portion 65 are the legs 30, 32 previously described herein. Integral with and depending vfrom the other two side edges of the connecting portion are lthe legs 46, 48 of the clevis. The connecting portion, being of appreciable thickness as previously noted, extends as a spacer between the adjacent, shear-pin-engaged tongue 28 and the swivel lug 50. As will be described in detailhereinafter, the shear pin is, as a result, then extendable through a center opening of the connecting or bight portion 65 into registering recesses of said tongue and swivel lug.

AThe body or hub portion ZZ has a central apreture 66 therethrough to receive that portion of the swivel 50 extending beyond the lower portion 44 of the clevis 16 and is retained on the swivel lug 50 by means of a nut 68 threadingly engaging the screw threads 56 formed externally along the end 54 of the lug remote from the clevis 16. A drive pin 70 is inserted in aligned openings through the nut 68 and the threaded portion 54 of the swivel lug 50 thus securing the nut on the swivel lug and preventing the nut from becoming disengaged with the swivel lug as the anchor base 18 rotates in a closed arcuate path about the longitudinal center line of the swivel lug Svas anaxis.

Theradius end 28 of the tongue 26 is provided with a recess 72 extending partially therein and along the longitudinal center line thereof to receive one end of the shear pin 24 while the two-way clevis 16 has a bore 74 therethrough extending along the longitudinal center line thereof and opening at one end to the space between the spaced parallel legs 39 and 32 and opening at its other end to the space between the legs 46 and 48 of the respective upper and .lower . portions 34 and 44 of the clevis, and the bore 74 is adapted to register with the recess 72. A recess 76 is provided in the radius end 52 of the swivel lug 50 and extends partially therein along the' longitudinal center line vthereof and is in register with ythe bore '74. The shear pin k24 extends within the bore 74 and the opposite ends thereof are respectively received in the recesses 72 and 76 so that theV shear pin 24 will extend along the longitudinal center line through the anchor 10 and forni a rigid connection between the stem, clevis and swivel lug or anchor base to prevent movement of the clevis 16 and the anchor base 22 in their arcuate paths of movement. With regard to the arcuate path of movementof the anchor base 1S, it will be observed that specifically, it is the-swivel pin 50 which is mounted to move in an arcuate path about an axis prependicular to the stem and clevis.

It will be observed that the body or hub 22 of the anchor base 18 is provided with a central reces-s or well 'lopening to the side thereof remote from the clevis 16 to house therewithin the nut 68 so that the uut 63 does not project outwardly beyond the side of the hub 2.2 remote from the clevis 16 thus providing more efficient operation of the anchor base 18.

The shear pin 24 is of suicient strength to hold the various elements of the anchor 10 rigidly together when in normal use, however, when the tines Zt) of the anchor base' 21.8 become wedged or snagged upon an underwater obstacle, there will be an abnormal force upon the anchor 10 Iwhich will be transmitted to the shear pin V24 thus causing 4the shear pin to break and the clevis and the anchor base will be permitted to move in their arcuate paths so that extraction of the anchor 10 along with the anchor line or chain connected thereto can be readily dislodged from the obstruction to thus save the anchor 10 and the associated anchor line by retrieving the same.

After the shear pin has been broken by the anchor base 18 becoming lodged in an underwater obstacle, and the anchor 10 has been retrived, it is a. simple matter to replace the broken shear pin 24 since it will be apparent that the various elements of the anchor 1t) can be easily removed and taken apart. To disassemble the anchor 10 it is merely necessary to remove the clevis pins 3S and 58. With the anchor thu-s disassembled, a replacement for the broken shear pin 24 can be inserted in the bore 74 and the parts reassembled in the reverse order to the disassembling. The anchor 10 will then be in condition for further use in the normal manner.

It will be appreciated that the various parts of the anchor 10 are formed of a material of suicient size and strength to withstand the use for which it is intended, taking into consideration the size of the boat with which it is to be employed as well as the nature of the bottom of the body of water where the boat is being used.

While there are shown and described the preferred embodiment of the invention, it is to be understood that the structure is susceptible to change and modification Within the practicability of the invention and therefore should be limited to the scope of the claims appended hereto.

What is claimed is:

l. A retrievable boat anchor comprising a stern, a twoway clevis carried by said stem for movement in an arcuate path about an axis perpendicular to the stem, an anchor base rotatably carried by said clevis at the end thereof remote Vfrom said stern for movement in an arcuate path about an axis perpendicular to said clevis and at right angles to the path of movement of said clevis, and a shear pin interposed between ysaid stem, clevis and anchor base to normally prevent movement of said clevis and said base in their arcuate paths, said pin adapted to shear under abnormal stress to permit movement of said clevis and said anchor base in their arcuate paths.

2. An anchor comprising a stem; a clevis connected at one end to the stem for pivotal movement about a first axis `perpendicular to the length of the stem; an anchor base connected to the other end of the clevis for pivotal movement about a second axis normal both to the length of the stem and Ito the first axis; and a single shear pin aligned coaxially with the stem between and perpendicularly to both axes, having an intermediate portion engaged in the clevis, one end portion engaged in the stem, and its other end portion engaged in the base to normally hold'the clevis against movement relative to the stem and the base against movement relative to the clevis, each end portion of the pin being adapted to shear from the intermediate portion independently of the other end portion.

3. An anchor comprising a stem; a clevis comprising a ilat connecting portion, a pair of first legs extending from A,said connecting portion in one direction in parallel planes normal to that of saidxportion and a pair of second legs extending from the connecting portion in an opposite direction and disposed in planes normal to those of the irst legs, said connecting por-tion being formed centrally 'thereof with an opening, the stem including at one end a tongue extending between the .rst legs and having a free end terminating `adjacent one face of the connecting portion vand formed with a recess; an anchor base including a `swivel lug extending between the second legs and having a free end terminating adjacent the opposite face of the clevis, said swivel lug having a recess in said free end thereof; a ypin extending through the first legs and said tongue and pivotally connecting the tongue to the rst legs for swinging movement about an axis paralleling the plane of the connecting portion; a second pin extending through y 1 p i 2,746,414

the Isecond legs andV said swivel lug and connecting the swivel lug to the second legs for swinging movement about an axis also parallel to the plane of the bight portion bu-t normal to the frst axis; and a single shear pin having an intermediate portion engaged in said opening of theconnecting portion, one end portion engaged in the recess of Ithe tongue, and its other end portion engaged in the reoess of the swivel lug to normally hold the clevis against movement relative to the stern and the base against movement relative to the clevis, each end portion of the pin being adapted to shear from the intermediate portion independently of the other end portion. Y

UNITED STATES PATENTS Hausler July 27, 1915 Bernard Dec. 14, 1926 Gibb Dec. 15, 1931 McLeland Oct. 30, 1934 Filbyv Iune 18, 1940 FOREIGN PATENTS Y Great Britain of 1898 Netherlands Feb. 16, 1953 France Jan. 11, 1939

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