US2563603A

US2563603A - Hoisting and pulling implement

Info

Publication number: US2563603A
Authority: US
Publication date: 1951-08-07
Anticipated expiration: 1968-08-07

Description

Aug. 7, 1951 HAUBERT HOISTING AND PULLING IMPLEMENT 4 Sheets-Sheet 1 Filed Dec. 5, 1945 Aug. 7, 1951 L. HAUBERT 2,563,603

HOISTINGAND PULLING IMPLEMENT Filed Dec. 5, 1945 4 Sheets-Sheet 2 Aug. 7, l 95l HAUBERT 2,563,603

HOISTING AND FULLING IMPLEMENT Filed Dec. 5, 1945 4 Sheets-Sheet 5 .90 I m g ll Q Q Q Q @1 1 Aug. 7, 1951 L. HAUBERT HOISTING AND PULLING IMPLEMENT 4 Sheets-Sheet 4 Filed Dec. 5. 1945 Patented Aug. 7, 1951 UNITED STATES PATENT OFFICE HOISTING AND PULLING IMPLEMENT Leo Haubert, Tulsa, Okla.

Application December 3, 1945, Serial No. 632,462

6 Claims.

This invention relates to hoisting and pulling implements wherein lever-operated devices are provided with an automatic release control whereby the operator may advance a take-up chain step by step, or withdraw the pulling implement along the chain step by step, without contacting any portion of the device except the operating lever.

One of the important objects of the present inventionisthe provision in a pulling implement of chain hooks of unequal length arranged to contact laterally extending cross-pins on the take-up chain, such hooks being pivoted upon an operating lever in positions preventing crossing of the chain hooks during operation.

Another object. of the invention is the provision ofa detachable frame readily positioned upon the pulling implement whenever it is desired to use the pulling implement against an object, as for example, in a load-binder. The detachable frame also serves as a chain guide whenever applied.

A further object of the invention is the arrangement in a. pulling implement of chain hooks-of. unequal length cooperating with a special-take-up chain so that the chain may be advanced or retracted a-half-link on each stroke of the operating lever, and whereby the longer hookalways operates on the taut end. of the take-up chain and the shorter. hook always engages the slack endthereof.

Other objects and advantages will be apparent from the following description wherein reference is made to the accompanying drawings illustrating a preferred embodiment of my invention, and wherein Fig. 1 isa side elevation of my: improved hoisting and pulling implement;

Fig. 2 is a plan view thereof, with parts shown insection along line 2'2 of Fig. 1;

Fig. 3 is a fragmentary side-elevation showing positions assumed while the longer hook is being advanced;

Fig. 4 is a view similar to Fig.- 3 showing positions assumed when the shorter hook is being advanced;

Fig. 5'is a fragmentary side elevation showing positions assumed by the handle and associated parts preparatory to retraction of the shorter hook;

Fig. 6 is a View similar to Fig. 5 showingposi tions assumed during the retraction of the shorter hook;

Fig. '7 is a fragmentary side elevation showing positions assumed by the handle and associated z parts preparatory to retraction of the longer hook;

Fig. 8 is a. view similar to Fig. 7 showing positions assumed during the retraction of the longer hook;

Fig. 9 is a view similar to Fig. '7 showing the completion of the retractive movement of the longer hook;

Fig. 10 is a detail vertical section taken substantially along the line Ill-16 of Fig. 11;

Fig. 11 is a vertical cross-section taken substantially on the line Illl of Fig. 10;

Fig. 12 is a side elevation of my improved hoisting and pulling implement equipped with a detachable frame for special uses;

Fig. 13 is a detail vertical cross-section taken substantially on the line l3-l3 of Fig. 12; and

Fig. 14. is a detail vertical section taken substantially on the line |4--l4 of Fig. 13.

Referring now to the drawings, reference numeral l0 designates the operating lever of my improved hoisting or pulling implement. Lever I0 is forked at its lower extremity and pivoted on trunnions I l in the forward ends of clevis 12, which carries at its rear portion a swivel I3 and hook 14 for engagement with a suitable anchorage whenever it is desired to use the pulling implement. As shown in Fig. 2, the trunnions H extend on opposite sides of clevis l2 for a distance suitable to permit their mounting in detachable frame ['5 whenever desired (note Fig. 12). The detachable frame 15 is intended for use only when my improved implement is utilized for binding a load or other operations where the pulling is exerted against some ob ject, and is unnecessary when the pulling implement is utilized for guywire tightening, et cetera.

Upper chain hook l6 and lower chain hook I! are pivotally mounted in the fork of lever ID at equal distances above and below trunnions H. These chain hooks are of unequal length and extend forwardly. They are formed at their free ends with laterally spaced hook portions I6 and H respectively, for engagement with the laterally extending cross-pins 18 of the take-up chain 19. These hook portions l6 and I! are substantially identical in shape, but face each other. Each is formed with a sloping end portion 16' or l'l forwardly of the recess [6 or I! in which the cross-pins of the take-up chain are adapted to seat. The sloping end portion l6 or I'l engages and rides upon the cross-pin 18 next forwardly of its then position when the chain is advanced, being held in engagement 3 therewith by the springs 29 and 2! (Fig. 12). When the hook portions are advanced sufiiciently by the throw of lever l9, such cross-pins 18 enter hook recesses [6 or I? because of the pressure of the same operating springs 29 and 2|. Between the hook portions [6 and Il at the sides the chain hooks l6 and I! are grooved to form upper and lower guides for the chain IS, a central rib on each hook being arranged to provide strength with light weight. Operating spring 29 engages the upper (shorter) chain hook IE to press it into engagement with the chain at all times, and a similar operating spring 2| engages the lower (longer) chain hook I! to press it into engagement with chain l9. As best shown in Figs. 10 and 12, each operating spring 29 and 2| is centrally looped about the pivot of its respective hook, with one end extending into engagement with a pin mounted on the hook at a substantial distance from its pivot. The opposite ends of the operating springs are formed into eyes for the reception of a cross-link 22 connecting the springs for mutual interaction in exerting uniform pressure on the hooks, both springs 29 and 2| cooperating with each other in flexibly maintaining pressure upon both hooks at all times.

The take-up chain I9 is preferably permanently associated with the pulling implement, and carries a hook 23 or similar work-engaging means at its forward extremity and a ring 24 at its rear extremity to prevent accidental disengagement of the take-up chain from the pulling implement. This ring 24 also affords a good hand-hold to enable the operator to take up any loose slack before he starts the lever take-up operations. The chain l9 herein is shown as comprising alternate pairs of fiat links l9 and I9 respectively, the inner flat links 19 being in lateral contact with each other and spacing outer links l9 from each other, as best shown in Fig. 2. Cross-pins I8 extend through and on each side of four laterally aligned link portions and forms the pivots on which the chain links swing. This arrangement permits spacing of cross-pins [8 at convenient short intervals to enable advancing or retracting the take-up chain l9 through short distances at each stroke without bringing the chain hooks into engagement with other portions of the links than the cross-pins l8. It will be obvious that this arrangement permits advance and retraction through step-by-step movements of one-half link at each stroke and that the distance between cross-pins may be varied at will.

As best shown in Fig. 2, the ring 24 on the rear end of take-up chain I9 is left open a distance greater than the thickness of one of the fiat links 9 but less than that of two of .such fiat links. To engage ring 24 upon the take-up chain one fiat link 19 is inserted into the open portion of the ring, the ring passed through the opening in such link, and then the second fiat link Ill swung into position in the open portion of the ring and the ring partially rotated. Obviously, the ring can be readily removed whenever desired, but will not become accidentally disengaged during take-up operations. This improved ring feature provides means for quickly assembling my pulling implement on the job and for easy removal of chain [9 from the pulling implement for transporting or replacement.

An automatic release arm 25 is pivotally mounted on lower chain hook H by a pin 26, and

is normally pressed forwardly under tension by a coil spring 21, here shown as centrally looped around pin 26 with one end pressing against the bottom of chain hook I! and its other end passing through a slot in cross-pin 2'6. The head of cross-pin 29 is drilled for a cotter key 28 which engages at its loop end a tension pin 25 mounted on the automatic release arm 25 at a suitable distance from the cross-pin 26, substantially as shown. Projecting from the side of upper chain hook I6 are a pair of

release pins

29, 30 spaced for suitable engagement with portions of the release arm 25. As shown in Figs. 3-9, the upper release pin 29 and lower release pin 39 respectively, engage with ofiset and slotted portions of"release arm 25, the tension spring 2'! maintaining the release arm constantly in contact with one or the other of the release pins. The release mechanism is controlled through operating lever Iii and will function at the will of the operator without requiring any resetting or manual adjustment.

To advance the take-up chain I9, as when it is desired to tighten a guywire or operate a hoist, the operating lever I9 is swung rearwardly until lower chain hook I! hooks over the cross-pin of chain 19 nextiorward, excess slack having previously been taken up by manually pulling on the chain through the ring 24. Operating lever I 9 is then swung forward until upper chain hook l6 hooks over the cross-pin 18 next forward of the cross-pin with which-it had been engaged. This operation may be continued as long as desired, the lower hook and then the shorter upper hook advancing one cross-pin at a time in a series of step-by-step advances, and without the hooks crossing each other at any time. It will be noted that the lower hook I! always operates upon the taut forward portion of the take-up chain while the shorter upper hook l6 always operates upon the slack rear portion of the takeup chain. Moreover, one or both of the chain hooks 16 or I! are always in engagement with the take-up chain l9, so that it is impossible for the take-up chain to become accidentally disengaged. When operating lever lll is stationary in either of its forward or backward positions, both chain hooks l6 and I! are engaged with cross-pins in the take-up chain.

To release the take-up chain whenever desired, the operating lever I0 is swung forward and backward the same as when the chain is taken up except that the operating lever is swung a little further in both directions. To release the upper chain hook IS, the operating lever I9 is pushed forward until the automatic release arm 25 engages the upper release pin 29, substantially as shown in Fig. 5. Operating lever I9 is then swung rearwardly and upper chain hook I 6 is held out of engagement from and passes over one cross-pin in the take-up chain. As the operating lever continues to swing rearwardly, the lower release pin 39 comes into contact with the release arm 25 (note Fig. 6) and disengages it from the upper release pin 29, whereupon the upper chain hook I6 is released and again pressed down by spring 20 into engagement with the chain, hooking over the second cross-pin in the take-up chain from that it had just engaged. When the operating lever I0 is in its rearmost position, the automatic release arm 25 engages the lower release pin 39, substantially as shown in Fig. 7, and when the operating lever is swung forwardly the lower chain hook I! is held out of engagement from and passes over one cross-pin in chain l9. As lever I0 continues to swing forwardly, the upper release pin 29 comes into contact with the release arm 25 (note Fig. 8) and disengages it from the lower release pin 39, whereupon the lower chain hook I1 is released and pressed by spring 2| into engagement with the chain I 9, hooking over the second cross-pin from that which it had just engaged. Both chain hooks I6 and I1 are then again engaged with take-up chain l9- and ready either to further release the take-up chain or again advance it, at the will of the operator. 7

To maintain the upper hook l out. of engagement with the take-up chain [9 when the takeup chain is being released, I preferably provide a guide spring 31 between upper hook and chain. As best shown in Fig. 10, this guide spring is anchored on the pivot pin of the upper hook Iii, extends forwardly therefrom into engagement with the take-up chain and has its forward extremity curved around the central rib section of the upper chain hook Hi. This guide spring is particularly useful when the pulling implement is used in a vertical or inverted position.

To make the automatic release arm 25 foolproof whenever desired, I provide a resilient disengagement holder 32. As best shown in Figs. 3-9, the disengagement holder is pivoted on the automatic release arm 25 and formed witha lower portion adapted to snap into one of two spaced

recesses

33 and 33 in the release arm. The upper portion of the disengagement holder 32 is formed as a loop which is located behind the slotted upper portion of the automatic releasearm 25 as long as the lower portion of the disengagement holder 32 is kept in the forward recess 33. When the lower portion of the disengagement holder is swung rearwardly into the rear recess 33 the looped upper portion of the disengagement holder is moved into position forwardly of and closing the slotted upper portion of release arm. 25 and so preventing the release arm from effectively engaging either the upper or lower release pins 29 or 30. This disengagement holder is a safety feature and need only be used while it is desired to prevent the take-up chain H) from being released.

The detachable frame [5 may be added to the pulling implement whenever it is desired to use such implement against an object, as in binding a load. The detachable frame is formed with brackets I5 adjacent its rear extremity having U-shaped openings arranged to serve as bearings for trunnions ll of the operating lever It. Caps |5 held in place by removable cotter keys close the upper portions of the trunnion hearing openings. Adjacent its forward extremity the frame I5 is formed with a chain guide bracket 15 of greater length than the distance between adjacent cross pins I8 and open at its top to permit the insertion of the take-up chain without removing the take-up chain I!) from the pulling implement. To thread the take-up chain 69 through the guide bracket l5, the take-up chain I 9 must be slack so that one link of the chain can be held in a vertical position (note Fig. 14), whereupon one cross-pin of the chain can be moved from front to rear through the bracket l5, the then vertical link passing between the sides of the guide bracket, after which the vertical link is permitted to fall into alinement with the remainder of the take-up chain. To disengage the take-up chain it is merely necessary to reverse such movement, swinging one link with its cross-pin into vertical position above the guide bracket l5, and then moving such raised cross-pin forwardly to release: the chain from the guide bracket.

T0 thread the take-up chain l9 into the pulling implement between upper and lower hooks l6 and I1, it is only necessary to hold the hooks apart. This is accomplished by manually separating the hooks l5 and I! until the top offset portion on the release arm 25 engages under the lower release pin 39. When in this position the release arm 25 will not become disengaged from release pin 30 until such release arm is manually swung rearwardly. While the chain hooks I6 and H are held in this open position, the take-up chain [9 is easily passed therebetween and pulled out any desired distance within the limits of its length. It will be noted that the central portions of the hooks are shaped to guide the chain. Accordingly, when the take-up chain is threaded into position and the automatic release arm 25 is again swung out of engagement with the lower release pin 30, the chain is snugly positioned and the pulling implement is ready for immediate use.

From the foregoing description it will be seen that my improved hoisting and pulling implement is made of very few, relatively inexpensive and rugged parts. It is sufficiently powerful to do the work of many heavy, cumbersome and expensive machines while its compactness and lightweight adapt it to ready transportation and a wide variety of uses.

Obviously the present invention is not restricted to the particular embodiments herein shown and described. It is not indispensable that all the features. of the invention be used conjointly, since they may be employed advantageously in various combinations and sub-combinations. Various changes and modifications may be made in the details of construction and design without departing from the spirit and scope of the invention as defined in the following claims.

I claim:

1. A pulling and hoisting implement, comprising a forked lever, a fulcrum device therefor, a take-up chain having laterally extending crosspins, upper and lower operating hooks pivoted on opposite sides of the lever fulcrum, springs pressing said hooks toward the chain, and release means pivotally mounted upon one of said hooks and actuated upon excess movement of the lever in either direction to hold either hook out of engagement with one cross-pin only as the lever is rocked.

2. A pulling and hoisting implement, comprising a forked lever, a fulcrum device therefor, a take-up chain having laterally extending crosspins, upper and lower operating hooks pivoted on opposite sides of the lever fulcrum, springs pressing said hooks toward the chain, and release means including a release arm pivotally mounted on one hook, a pair of spaced pins carried by the other hook in position to be contacted by said release arm, and a spring pressing said release arm into engagement with one or the other of said pins.

3. A. pulling and hoisting implement as recited in claim 2 provided with disengagement-preventing means comprising a member pivoted on said release arm and swingable to a position engaging said pins in advance of said release arm.

l. A pulling and hoisting implement, comprising a forked lever, a fulcrum device therefor, a take-up chain, operating hooks pivoted on opposite sides of the lever fulcrum, resilient means pressing said hooks toward the chain for engagement with a'portion'of a link thereof, and release and actuated upon excess movement of the lever in either direction to hold either hook out of engagement with one link, only as the lever is rocked.

5. A pulling and hoisting implement, comprising a forked lever, a fulcrum device therefor, a take-up chain, operating hooks pivoted on opposite sides of the lever fulcrum, means yieldingly pressing said hooks toward the chain, and release means including a release arm pivotally mounted on one hook, a pair of spaced pins carried by the other hook in'po'sition to be contacted by said release arm, and means yieldingly pressing said release arm into engagement with one or the other of said pins.

6. A pulling and hoisting implement, comprising a forked lever, a fulcrum device'thereforja take-up chain,'operating h0oks"piv0te'd on opposite sides of the lever fulcrum, means yieldingly pressing said hooks toward the chain, re

lease means including a release'arrn pivotally' mounted on one hook, a pair of spaced pins car- 8 ried by the other hook in position to be contacted by said release arm, means yieldingly pressing said release arm into engagement with one or the other of said pins, and disengagement preventing means comprising a member pivoted on said release arm and swingable to a position engaging said pins in advance of said release arm.

' LEO HAUBERT;

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Nidiver Mar. 14, 1944