US1995509A - Grapple or grab hook - Google Patents

Description

March 26, 1935. D. H. HAYDEN 1,995,509

GRAPPLE OR GRAB HOOK Filed Nov. 20, 1953 Patented Mar. 26, 1935 UNI-TED STATES PATENTS OFFICE ,A

` 1,995,509 'Y Y 'f GRAPPLE on GRAB 1100K David Homer Hayden, Brookllyn, N. Y. y Application November zo, 1933, serial No. 698,819 1,9 claims.` (c1. 294-104) `The invention relates to grapples or` grab hooks and seeks to provide a tool of this sort of simple, effective construction, and which is particularly adapted and designed for removing the spreaders from the forms for concrete wallsA and the like, as the concrete is poured. K The invention consists in the features hereinafter set forth, illustrated in the preferred forms in the accompanying drawing, and more particularly dened in the appended claims.

In the drawing: K o

Fig. 1 is a View in elevation of the preferred embodiment of the improved tool or grapple. j

Fig. 2 is a side View thereof, and y Fig. 3 is a view similar to Fig. l illustrating a modification. Y Y

The tool is provided with a stock or handle 1 of suitable length yand which may be conveniently formed of wood. A metalsupporting plate 2 is secured to the end of the stock or handle 1 by screws 3 and a pair of cooperating grab hooks or tongs are mounted onV the supporting plate. One of 4the hooks comprises an arm 4 which is fixed at its upper end, as by means ofrivets 5, to the lower end of and adjacent the edge of the plate 2, the arm 4 extending in line with the stock or handle 1 andhaving a pointed or toothshaped lower end 6. Y n

The cooperating hook in the form shown in Figs. 1 and 2, comprises an arm 7 having apointed lower end or tooth 8 and this arm is fulcrumed or connected by a pivot bolt `9 to the end of a swinging arm 10. Thelatter is pivotally connected atits upper end by means of a stud 11 to the lower end of the supporting plate V2. A

heavy coiled spring 12 is connected to the arm 10, and to an offset lug 13 on the lower edge of the plate 2, the parts being so arranged that the spring, as shown, is disposed below the end of the handle 1.

The arm or grab hook 7 is provided with a rigid lever arm 14 which is preferably integral therewith. This lever arm extends across the hook or arm 4 and between this arm and a guide bar 15. The latter is held in position by the stud 11 and by a stud or bolt 16 which extends through the hook arm 4, the guide `bar having offset ends 17 to hold it spaced from the other parts. 'Ihe lever arm is provided with an inclined camshaped lower edge 18 disposed between shoulders 19 and20 and which are arranged to engage the stud or abutment 16 on the iiXed hook arm 4. In the form shown, the lever arm 14 is provided on its end with a pointed tooth or hook 21 and adjacent the shoulder 20 with aV hook 22. As most lower.

Clearly indicated in Fig. 2, the tooth s on the lower end of the hook 4t is offset to bring itin line with the'tooth of the hook '7.

The closed position of the grab hooks or tongs is shownY in yfull lines in Fig. 1. In this position 6 the shou1der'20 and hook-22 engage theV stu'd or abutment 16'. By pressing down von the'projecting end ofthe lever arm 14, thiscam edge18 cooperates with the stud or abutment 16 tomove the arm`10 against the pull of the spring 12 and 10. thereby force themovable hook armi? to open position and theshou1der`1'9 of the leverthen engages the stud or abutment 16 to hold the y hooks 'in open position as' shown in dot fand dash lines kin 1=ig.`1.A In open position, the part or hook 22 of Vthe cam lever is vdisposed between and slightly above Ythe teeth k6 and 8of the grab hooks and when the toolwith the grab hooks opened isengaged with'any part suchas a woodn en spreader123Y forconcreteforms, the part 22 is engaged by the spreader or the likeA and the shoulder 19 of the lever arm is disengaged from the abutmentl 16 and the spring 12 then forces the hooks together so that they bite vinto the spreader and then-its removal Vcan rbe readily elfected. Itis noted that` the arm 14 forms a combined cam lever and Alatch which cooperates with the abutment 16for forcing the hooks open against the4 pressure of thev spring 12 .and yfor releasably holding the'samev in open position.

In the form shown in Fig. 3, the construction and arrangement of the correspondingly numbered parts are the same asin, the form shown in Figs. 1 and .2. But in this modiiication, the swinging or `pivoted arm 10 is extended beyond its pivotal connection with the lever arm 14', and the movabletooth or hook 8 is formed thereon instead of on thelever. The lever arm isprovided with a curved cam surface 18 and a notch 19"which cooperate with the stud or abutment 16,: YVwhen the lever arm is depressed to force the hooks to open position and releasably hold the same in such position. When theV lhooks are opened as shown in full lines in this-iigure, the curved lower edge ofthe lever arm is in position to be engaged by a woodenl spreader or the like to release the latch lever and permit the hooks to bite into the spreader. Y

Heretofore considerable inconvenience Ahas been encountered in removing the spreaders from the forms for concrete walls and the like, since the spreaders are tightly clamped between the walls of the form and must be removed as the concrete is poured. The present improved grapple forms a convenient tool for this purpose. Its 55 Gil. V v

Y operating grab hook pivoted on said arm andor tongs, a spring for forcing the same to closed Y position, an abutment on one hook anda coinbined cam and latch lever associated with the otherhook and arranged to cooperatewith said abutment to force the hooks open against theY pressure of said spring and releasablyV lock the same in open position. f. V Y

2. A grapple comprising a stock, grab hooks mounted thereon, a spring for forcing the hooks yto closed position, and a cam lever connectedrto one of said hooks and extending beyond the other hook, the latter having an abutment afiixed thereto and said klever havingY a4 cam edge and shoulder` arranged to engage said abutment for forcing theA hookseopen against th e,pressure of said spring vand releasably holding thehooks in openpositionQ v Q l 3. A grapple com swinging'arms thereon, a-'spring` connected to said swinging arm, a lever arm fulcrumed on said swingingarm, an abutment on?) said xed arm,

, s aid lever Iarm having a cani edge and shoulder arranged to engage said'v abutment -for shifting said swinging armagainst .the `pressure-oiffsaid spring and releasably holding the-same in shifted position, and cooperating Ygrab hooksformed 0n saidixed arm and on-one of the. other arms.

A4. A grapple comprising a stockexedand pivoted armsmounted thereon, a spring connected to,saidpivoted arm, a vlever .arm fulcrumedY on said pivoted arm and extending across said xed arm, the latter having an abutment,fand cooperating grabhooks formed on said xedlarm and on one of. the other arms', said lever arm having a cam edge and shoulder arranged to. engage said abutment to force the hooksiopen and releasably hold the same in openposition. Y

5. Av-'grapple comprising relatively .movable grab hooks spring pressed-to closed position,' one of said hooks having a leverarm rigid therewith andY provided With acam'edge andshoulder arranged to engage the other hook for forcing the hooks apart and for releasably locking the saine in op'enposition.

i 6. A-grapple comprising .asstocle a pivotally mounted swinging arm anda fixed grab hook on said stockfa spring connected `to said swinging arm, an abutment on said fixed hook, and a corisingV a stock, xed and having a rigid lever arm provided with a cam edge and shoulder arranged to engage said abutment.

7. A grapple comprising a stock,.fxed and pivotally mounted grab hooks thereon, a spring connected to said pivoted hook, and a combined cam and latch lever connected to one of said hooks, the other hook having an abutment arranged to be engaged by said lever to force the hooks apart and releasably lock the same in` open position.

8. A grapple comprising a Stock, fixed and pivotally mounted arms and a guide bar on said stock, a spring connected to said pivoted arm, an abutment on said fixed arm, a lever arm pivotally mounted onsaid pivoted arm and extending between the guide bar and the fixed arm and provided `with Aa cam edge and shoulder arrange to engage said rabutment, and cooperating grab 'other of said arms.

9. A grapple comprising a stock, a pivoted arm,

Va guide bar and a fixed grabrhook on said stock,

a spring connected to said pivoted arm, an abutment on said fixed hook, and a cooperating grab hook pivotally mounted on said pivoted arm and having-a rigid leverarm extending between the guide bar and fixed hook and provided with a cam edge and shoulder arranged to engage said abutment.

' 10. A grapple comprising a stock, a pair of grab hooks carried thereby, a spring for forcing the hooks to closed position, an abutment on one hook, and a combinedcam and latch lever `connected to the other hook and a-rranged to engage said abutment to force the hooks open against the pressure of said spring and releasably' hold the same in open position, said latch lever being arranged to `be engaged and tripped by an article between the hooks. l vt l 11. A grapple comprising a stock, relatively xed and swinging grab hooks Acarried thereby, a spring for forcingsaid. swinging grab hook to closed position, an abutment on one of said hooks, and a combinedcam and latch lever connected tothe other hook and arranged to engage said abutment forshifting said swinging hook against the pressureof said spring and releasably hold the same in shifted open position.

l2. A grapple comprising a stock, relatively xed and swinging grab hooks carried thereby, a spring for forcing the said swinging grab hook to closed position, a cam lever connected to one of said hooks and extending beyond the other hook, the latter having an abutment and vsaid lever having a cam edge and shoulder Varranged toengage the said abutment to shift said swinging hook against the pressure of said spring and releasably'hold the `same in shifted open posi-v tion, said lever being arranged to be engaged andl

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