US2332443A - Jack - Google Patents

Description

Oct. 19, 1943. RIL FORINGER 2,332,443

JACK

Filed April 18, 1941 2 Sheets-Sheet 1 INVENTOR.

RICHARD L.FORINGER BY mm, 9mm

FIGJ

A TTORNEYS.

Patented Oct. 19, 1943 f f N TE I I team- T flJAcK..-:, m.

' Iti chardL'Foringer;Syracusq'MYi a 1 I g Appneanbsnpnnis, 941, Serial No. 389,187

The invention relates to: as-jack -suitablezi-to. be

used'to raise a.-tank,-othencircular body or a body l having 1 inclined sides which; is. resting on the flcorsorupon narrow.cleatsgwhereupon the tank or the like may bepulledaway. The jack utilizes the inclined. sides of the circumference of the tank or the curve of thebod-yto liftthe same.- Asquare tank may rest on eleatsuhaving inclinedfaces, or other means-maybe. provided therefor. A jack may be provided at .each; end of atank to completelyliftthe same'fromthe floor so that it may -be pulled to anysdesired place. r a r It is an-object ofthe invention to construct ajack which is simple in constructionland con s'equently inexpensive to manufacture and yet is eifective to raise -heavy bodies.'

v Another .objectof the invention istozprovide spaced means which are pulled together. linear- 1y until they engage. the inclined surface of: the tank orother .body and raisethe latter, the spaced means being pulled together-by operating means having the double Junction of supporting :the spaced means-in their spaced relation and draw-;

ingthe spacedmeanslinearly and horizontally towards eachother toraise the body::so.' that a separate frame iseliminated; Another object of'the invention is to construct a jack of the type having a pair. of spaced means,

which are: drawn towards each 2 other to raise the body so that the-operating means is necessarily spacedgiromthe. supporting axis of the spaced means; andi having :a pair :of operating screws forming. the -operating means to offset thetendency of the spaced'means'to angularly spreadwhen the weight of the bodyis placed thereupon. I 1 i 1 7 Other objects-of the. invention willzbe more apparent from the followingdescription takenin connection with the accompanying:.:drawings;

illustrating ltwo embodimentsoithe invention-,in

, which: v

Figure 1 is a side elevational- .view. of oneiform of jack rin-position at the end of a tank" ready tohavethe spaced means drawntogether sothat the end -of 1the tank: can be araised. ofi of athe floonp Figure 2 is a viewshowing the end of the ;tank

Figure? is a plan -view of-.-the jack. I

Figulre i 'is -an end view of -the iack and the end of a tank raised thereby;

taken on line 6 6 Tandliproiectedziromrthat fieurez" r Y Figure? is-a-diagrammatid viewtcf theniack and the-end .ofi-a .tankishowingethei forces applied uponthejackbytheMeightof thentanksi.

Figure 8 iisi-a diagrammatic;viewzofzthe vtend means or irames 10,11 Leach ofwhich preferably. 7 has a pairof spaced tankiiengagingan'ollei'sfl2 which engage the; tank 'or wbodyf to; be raised:

Any suitable body; engaging. means-may zber pm-i vided in placeof the roller-s1gbillu'stratedsz-Roller: f

means, which ispreferablyacaster i3',:-is-..secured to-each frame lflgc-ll-rfso that;the .vvertical:iaxis of the caster. is between thettanka engaging rollers 12; Greatestistabilityisobtained'if .thegt'erti'ea-l' axis is midway between:theuouteraendgabf: the rollers. 1 Arline .lying in an imaginary planet-ex: tending through the vertical axes of theaca'sters i3 may -be-definEdas-the supporting .a-xis ofiithe jack Operating means is provfided:initthe screws 16' and :I! and tubular .nutclil8filsTlie. screwixalfi eis carried 'by :the frame-ll 0 51the1screvz: i l is i-carried by the frame-1 I, and:the-elongated'inutz.i 8: couples the two screws together. 1- The screwnit isxprd-z vided with a thread: in one zdirectinng; such: as; a left-hand thread,. and.-lthescrews! T. is. provided with 'anopposite or right-hand thread: Upomro'e tation of the tubular nut l 8," the. pair of; spaced means is drawntoward eachrother, whereupon the tank or.v body kengagingirollers I2; engagerithe circular .surface i-of :.thei tank,.;and upon: further Figure 5 is a plan view of--another f'ormwof jack h avinga pair;ofpperating screwsi-- L Figure 6- is a section of the 'ackmbFigurw-Ei;

movementtowardreach other, thetankl-islraised off: of the .floor. It -;.wil-l v be"olzaserved,:therefore; that the operating means not. only" serves. toidraw the spaced-wmeans towards or t-awaygfromi each other; but also: provides. the i'ramerv for supDQ-rte; ing the spaced means imspacedrelation,sotthat a separate nframe; may bei-dispensed: with,:-. It.. is for this reason.thatthe.op-eratingzmeans is spaced from 1 the supporting. axis; of the; spaced means and is .parallelxtherewith; I I,

- .An-y: suitableemeans may ibebutili ze'd to;.;rotate the tubular nut l8; ratchet means, however. is the preferred construction. The ratchet means includes a ratchet wheel 20 which is secured to the tubular nut I 8 in any suitable manner. A pawl 2| is carried upon a pivot 22 which is secured in the arms of a fork 23, the fork being freely mounted upon the tubular member 18 so that it may rotate thereupon. The pawl 23 is double ended so that one end thereof may engage the ratchet wheel 20 to rotate the tubular nut It in one direction to draw the spaced means together and raise the body to be lifted or moved, and then when it is desired to lower the same to the floor, the pawl is shifted so that its other end engages the ratchet wheel 20 in orderto roopposite direction which moves the spaced means away from each other.

Preferably the fork 23 has a handle 25 extending therefrom, which handle may be pivoted to the forkby means of a pivot pin 26. The pivot pin renders it easier to pull the tank in any direction when it is resting on a jack or 'J'acks.

With a single screw operating means as illustrated in Figures 1 through-4, which necessarily is parallel to but spacedfrom the supporting axis ofthe spaced means, as previously discussed, when the weight of the tank T or body is placed upon the spaced means, there isa tendency to separate the spaced means angularly away from each other, that is, to cook them relatively to the nut, such as the tubular nut l8. Thin may be obviated by making the nut relatively long so that it has a long engagement with the operating screw, or it may be obviated by Using a double operating screw, as illustrated in Figures through 8. In this construction the spaced means again includes a pair of spaced frames 3lland 3i which are provided with means for engaging the tank or body to be raised, which p eferably is a pair of spaced tank engaging rollers 32. Each frame carries as a part of the spaced means a roller means 33 which engages the floor. The roller means preferably are casters, and again stability is obtained if thevertical axis of each caster is midway between its respective tank engaging rollers 32. Here, again, a line lying in an imaginary plane extended throughthe vertical axes of the casters constitute the supporting axis.

The jack of Figures 5 through 8 is also provided with operating means which not only serves to draw together or separate the spaced means so that a tank may be raised from the floor or lowered to the floor, but also serves as the frame for supporting the spaced means in, spaced relation. This operating means, in the construction particularly illustrated, also constitutes screw means which is spaced from and parallel to the supporting axis of the jack. The operating means comprises a pair of parallel screws 34 and 35. Oneend of the screw 34 has a thread of one direction, such as a right-hand thread, and the other end'has a thread of the other kind, such ,as aleft-hand thread. The screw 35 similarly has a difierent kind of thread at each end thereof, and in addition thereto, corresponding or adjacent ends of the screws 34 and 35 are threads of opposite kind, that is,.if the left-hand end of the screw 34, as shown in Figure 5, has a right-hand thread, then the left-hand end of the'screw 35 carries a left-hand thread. In other words, the ends of each screw carryan opposite thread and adjacent ends of the pair of screws are. also opposite. One end of each screw is'threadedly retate the ratchet wheel and tubular nut IS in the ceived in the frame 30 and the other end of each screw is threadedly received in the frame 3|, so that each frame provides its own nut fo each screw.

Any suitable means is provided for rotating the screws, ratchet means, however, being preferred. The ratchet means includes a ratchet wheel 38 which is secured or keyed to the screw 35. A pawl 39 is carried upon a pin 49 which is in turn carriediby a fork 4|. The fork is freely mounted upon the screw 35 to oscillate thereupon. The pawl 39 is of the double ended type so that one end of the pawl may engage the ratchet wheel 38 for rotating the same and the screw 35 in one direction, or when it is desired to rotate the screw 35 in the opposite direction,

the other end of the pawl is brought into engagement with the ratchet Wheel. The spring 42 retains either end of the double pawl in contact with the ratchet wheel.

The ratchet wheel 38,. also preferably serves as a gear which meshes with a gear 45 secured or fixed'upon theope'rating'screw 34 in any suitable manner, such as by keying. The straps 46 retain the gear 45 in mesh with the gear or ratchet wheel 38 andprevent axial displacement thereof along the screw 34. 4

Since the gears 38 and .45 rotate in opposite directions, thereby rotating the screws 34 and 35 in opposite directions, the threads at correspond? ing ends of .the screws must be of opposite kind. The spaced operating screws 34 and 35 overcome the tendency of the spaced frames 30 and 3! to angularly separate from each other when the weight of thertank is placed thereupon. This angular displacement could similarly be rectified with a single screw by providing a relatively long bearing or nutsurface upon the respective frames 30 and 3|.

. In. both constructions of jack, roller or rollers 32 are essential where the jack is to be used first to raise a tank or other body off the floor and then rotate the sameon the jack rollers 32 for any purpose, such as Welding or riveting the tank plates; The jacks described herein are-well suited for this purpose since the tank or body is first raised off of the floor on the rollers, and is then supported thereonso that it can be rotated at wi1l,'as the work progresses, to bring the welding or' riveting 'pointto any desired or convenient level or position for the, workman.

The ends 48 of the operatingscrews, 34 and 35 may. be squared'to receive a wrench 49 for initial rapid movement offthe spaced frames towards or away from eachother. A wheel or preferably a caster53 may be providedbelow the ratchet mechanism, if desired, which improves the stability of the jack; Where such additional caster is used," it is not necessary. for the vertical axis of eachcaster 33tobe located between the ends of the rollers :32, but each may be shifted towards the end of the frame if desired.

This-invention is presented to fillla need for improvements in a jack. ,Variousxmodifications in structure, aswell as changes in mode of operation, assembly, and manner of use, may and often do occur to those skilled in the art, espe-, ciallyafter benefiting from the,teachings herein. Hence, it will be understood thatthis disclosure is illustrative of preferred means of embodying the invention in useful form by explaining-the construction, operation and advantages thereof.

.What is claimedis:

1. A jack comprisin a pair of spaced frames, means carried by each frame to engage the body to be raised, roller means carried by each spaced frame and engaging the floor, a pair of spaced screws parallel with and spaced from the sup porting axis of the frames and threadedly engaging the frames in spaced relation to support the same, said screw means also being operative to draw at least one of the frameshorizontally and linearly towards the other, ratchet means operatively connected with the screws, and a handle connected with the ratchet means to operate the same.

2. A jack comprising apair of spaced frames; means carried by each frame to engage the body to be raised; roller means carried by each spaced frame and engagingthe floor; a pair of spaced screws parallel with and spaced fromthe supporting axis of the frames and threadedly engaging the frames in spaced relation to support the same, said screw means also being operative, to draw at least one of the frames horizontally and linearly towards the other; operating means connected with the screws including a ratchet frame, a ratchet means, and a handle connected with the ratchet means to operate the same;

and a roller means carried by the ratchet frame. 3. A jack comprising a pair of spaced frames,

means carried by each frame to engage the body to be raised, roller means carried by each spaced frame and engaging the floor, a pair of spaced screws parallel with and spaced from the sup porting axis of the frames and each end of each screw threadedly engaging each frame in spaced relation to support the same, saidscrew means being operative to draw at least one of the frames horizontally towards the other, a gear operatively connected with each screw and meshing with eachother, a pawl operatively engaging one of the gears, and a handle connected with the pawl to oscillate the same and rotate the gears and screw means simultaneously.

4. A jack comprising a pair of spaced frames,

spaced rollermeans carried by each frame in alignment to engage the body to be raised, roller means engaging the floor and carried by each spaced frame, screw means parallel with and spaced from the supporting axis of the frames,

and supporting the frames in spaced relation, said'screw means being operative to draw at least one of the frames horizontally towards the other,

ratchet means operatively connected with the 1 screw means to rotate the same, means for manually operating the ratchet means, and additional selective means for operating the screw means,

independently of the ratchet means.

5'. A jack comprising a pair of spaced frames, spaced roller means carried by each frame in alignment to engage the body to be raised, roller means engaging the floor andcarried by each spaced frame, screw means parallel with and I spaced from the upporting axis of the frames,

and supporting the frames in spaced relation,

said screw means being operative to draw at least: one of the frames horizontally towards the other,

ratchet means mounted on the screw means between the spaced frames and operatively connected with the screw means to rotate the same, and means for manually operating the ratchet means. i

RICHARD L. FORINGERT

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