US2438415A - Lifting device - Google Patents

Description

March 23, 1948. J, M, J mBO'UD 2,438,415 IrgIF-TING DEVICE Filed March 1, 1944 j 2 sheets-sheet 2 INVENTOR JA col/Es /l/l. J. /WBOUD .jdmmg fXgMuLm/w Patented Mar. 23, 1948 LIFTING DEVICE Jacques M. J. Riboud, Mount Washington, Md.,

assigner to Specialty Equipment and Machinery Corp., New York, N. Y., a corporation of Maryland Application March 1, 1944, Serial No. 524,835

1 Claim. 1

My invention relates to a lifting or elevating device, and while I will describe same in connection with a particular use, i. e., a limber for use with a field gun, my invention may .be used equally well for many other purposes, and is to be limited only .by the scope of the appended claim.

The average field gun mount usually comprises a wheeled support for the gun, and a trail, the trail being hooked onto the limber during travelling movement. The weight of the gun may often be quite substantial, and poses a problem not only in lifting same and securing it to the limber, but also in unhooking same from the limber and dropping it to the ground when it is desired to locate the gun in firing position.

The main object of my invention, therefore, is the provision of a device for lifting objects from the ground and locking same in elevated position.

Another object of my invention is the provision of a lifting device for use with a moving vehicle, which device is actuated by movement of the Vehicle.

Another object of my invention is the provision of a lifting device comprising a shaft, and an angulated lever, one arm of which is secured to the object to be lifted and the other arm is connected to the lifting force, said lever being pivotally mounted on the shaft.

Another object of my invention is the provision of a lifting device which comprises a support and a shaft thereon, a lever pivoted on the shaft, and having a movable connection between the shaft and lever, movement of which connection actuates the lever to raise or lower objects engaged thereby.

Another object of my invention is the provision of a lifting device which comprises a support and a shaft, a lever pivoted on the shaft and having a movable connection between the shaft and the lever, movement of the connection altering the leverage ratio between the lever and the shaft.

Another object of my invention is the provision of a lifting device of a shaft pivoted on a support and a lever pivoted on the shaft, and means on lthe shaft whereby the leverage ratio between the lever and the shaft may be readily altered.

Another object of my invention is the provision of a lifting device which comprises a wheeled mount, a shaft thereon, a collar secured to a moving vehicle, and a lever for securement to the object to be lifted and to the moving vehicle, the leverl being angulated and pivotally mounted on the shaft, and secured to the collar.

Still another object of my invention is the .pro-

2 vision of a lifting device which comprises a shaft, a lever pivoted thereonto, and sliding means to actuate the lever whereby to raise objects secured to the lever.

Still another object of my inventionV is the provision of a lifting device which may be quickly actuated to raise or lower objects towhich it may be secured.

Other and further objects of my invention will be obvious from the following description of an illustrative embodiment of my invention, and still others specifically referred to hereinbelow.

In the drawings annexed hereto and forming a part hereof:

Figures 1, 2, 3, 4 are side elevational views showing various stages in the lifting of a field gun using the device of my invention.

Fig. 5 is a side elevational view of one form of device constructed according to and embodying my invention;

Fig. ,6 is a top plan view thereof; and

Fig. 7 is a detail of the locking mechanism, partly in section.

Reference number I0 indicates a eld gun having a .body I2 mounted on wheels I4, I4 at the front, and flat-bottomed, ground-gripping jack legs I6, I6 at the rear. These rear legs I6, I6 must,Y of course, be raised above the ground before the gun I0 may be shifted readily, on its wheels I4, I4, from one side to another. A suitable eye-piece or ring I8 is provided at the rear of chassis I2, mounted on a rigid extensionbracket assembly 20, whereby the gun may be engaged by the lifting and travelling mechanism. It is to be noted that bracket 20 and engaging ring I8 are spaced outwardly from, and in line, with chassis I2. Thus, lifting and moving forces applied to chassis I2 at ring I8 are directly transmitted to the rear end of the chassis through.

the bracket arms I8.

My lifting device comprises a metal shaft 3U mounted on a pair of wheels 32, 32 and braced'` by angulated rods or brackets 34, 36. The wheels: 32, 32 maybe mounted on a conventional aXle, if desired, although I have shown wheels 32,1 mounted onto stub shaftings 38 to which .brackets If desired, shaft 30 andi brackets 34, 36 may be formed, as by casting or otherwise, as one piece. Shaft 30, at the front:l end thereof and on one side, is provided with a: rack comprising a plurality of forwardly extend-l ing teeth 4I), 40, and a slidable concentric collar 42 is provided about shaft 30, having an internal*` catch 44 which is normally spring-46 urged intoengagement with teeth 40 to lock collar 42i 34, 36 are secured.

3 against rearward movement against the biasing of teeth 40.

The rear end 50 of shaft 30 is split, and angulated lever 60 is pivotally secured Within the split end of a link rod l0, the frontl end of |which is" Thus, as collar' JBZ'i's" connected to collar 42. shifted back and forth along shaft till,4 leverf!) is pivoted about pin B2 tdraise `or gl'ovver;reachVN -15fquickly and..

A hollow sleeve Iil!) is mounted within colla 42, and is screw engaged with a'socket l92 at 93. Coil spring 46 is held sleeve B bearing against catch 44. by counter-clockwise rotation thereof, bearing sleeve 9!) outwardly, catchV 44 ,is lifted out of engagement with teeth `B,jthereby permitting [col lar 42 to be shifted freely backend fiorita along shaft 30. A bail or ring @Il is connected to* he fr ont of collar yi2 so that theco'lla-r may ate tached toalorrygaslli. c Y

Figs. 2 and 3 shdw gun vHl -at rest on the ground. In Fig; 3 'my' lifting VdeviceV is shown backed `up in proximity to the rearofchassis lf2, and shaft 3b pivoted about the wheel aXle o1* stub shafts to permit `hook 'A66v to be threaded through'ring le. .shaft '3u' isi their breng-nt into norize'gitai position and` ring fsendoked onto the Ymotive power', as lorryL. VIt may not beat all necessary to liftrshaft `lill, as in Fig. 3, for sleeve er collar 42 may be brought as near the rear end of shaft 39 as is possible ytio -tlhe-re'by swing reach 154 down as low as may 'be necessary 'SoeketuQZ is then rotated Clockwise to force catch M onto spring-urged engagement With teeth 210;

As lorry L moves forward, in th'eldir the arrow, collar i2 Vis" slid forwardly allori haft 39, catch 44 ridi-fig over tli argledfaces -ofteth 40 carrying link l!) Aalongwitllv it exerting a; forward pull on Yreah 68 of levei vS.""'Lever so is.` pivoted about ein e2 and causes reacnsll to rise and lift the 'rear end ofchassis igeiong with it; Afsuitablestop, as 98, is provided at the end of shafts@ Qtolim'it movement of echar e2, and. the biasing .of Vteeth 4B and' catch *de prevents-theV return movement .of colla` 42 until the socket v92 isreleased; Figs'. 3, 2, tl"`ar1d 1 show successive Vst'agkes inY theoperation .of my device.

As collarASZ 'is' shi-ftedalon'g 'shaft v313',- the distance abetween'hok BBan'd the center bf rotation of shaft 30 is'joha'ngecl, and itheleverage ratio of my device-asia' lever vis thereby altered,

since shaft v30 pivotsj about" stubs.l 38;' for any particular purpose, it is"easyto'de termine the optimum leverage .ratio merely [by'shifting collar 42 back and forth. My xdevice 'may there- 1 fore be manually .operated 4as 'al leveiiliaving changeable leverage ratiorfor any .desireidpurposes. In Figs. 3 and'i, il have illustrated also the manner in .which'niyidevic'e may' bemanually operated to lift an object'as Chassisllll In Fig. 3 shaft 30 is pivoted' upwardly on'its'sup- As socket 92 is unscrewed.

'on of 4" the shaft down thereupon causes a lifting of the chassis, as shown in Fig. 4.

When it is desired to drop the rear of chassis I2 onto the ground for firing the gun, the lorry 5 is stopped. Ring 80 maybe disengaged completely from the lift. Socket wrench 92 may be .actuated to .draw catchglll out of engagement with teetlfi 4D, and lever (ilwill pivot about its axis at 6'2 to permit chassis l2 to drop to the 10 .,ground. In the alternative, as is possible with 2,438,415 ff e f .glm to drop to the ground while still engaged to the lift, and thelift is still engaged to the lorry. j VAotljithe ra ing and lowering operations are i lyaccomplished. My device can 'be 'fabricated-.and'assembled'easily and quickly and its operation is exceedingly simple. I- have'withinynew and improved lifting fdcvice, vmarie possible the V.formation of a combination which in and of itself is new and extremely useful, that is, a combination comprising Han `object to be VliftedV partially foff the ground and restedV on Wheel supportsga lifting ldevic'ejvengageable With kthe object Yto, be lifted, anda moving or tractoring device which is engageable with Vthe lifting device, in |which combination forward movement ofthe moving device actiiates Y the lifting vdevice to raise the engaged en-d of the object to be lifted. As movementrof the tractoririg device ceases, the lifting device is locked i-n operative position to continue to support the lifted objectfoif the grourld.'v When key wrench 492 is released, the liftirigjdevice permits the lifted object to dropto the ground'. Key wrench 92 `iiiay be actuated from a remote posi'- tion, as froir the drivers seat on lorryfLLtlie tractoringdevice, to permit thelifted objectjto be 'dropped down tothe ground pr other" resting place: Y 40 VIlIavi-n-g now described myY invention, hwliat claim and desire to secure by Letters'latent, is: A lifting device comprising a shaft 'and ,an obtusel'y angulated lever having two arms and piv'otailly secured to Ythe end of the shaft at the point of ang'ulation'of the lever, a collar on the shaft and slidable therealoiig, a 'link conmeeting the collar and'leventhe shafthaving` a rack, and the collar'havi'ng means therewithin normally engaging theY rack permitting l free movement of the collar in the Vdirection.along the'shaft away from the point of angul'ation .of Vthe'lever.4 j' n LJACGHJELS M. J. RIBOUD.

RnraRsNoEs .CITED UNITED STATES'PATNTYS *i Number Name c VDate 531,503 Brolgh ----v----- 13-.2.5.1394 576,46@ nene-2,- l139i "194,576 Williams o Juiy i1, i905 c 1,023,G24 McBride A lli'prgfllllZ c5 V1,349,198 Gould k Auggie, i920 2,162,448 `Sutton JunelB, 1939 2,259,023 Y, Y Y

smacks' wiegen r'riy device, catch 92 is released to 4permit thek

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