US1745053A

US1745053A - Portable stack lifter

Info

Publication number: US1745053A
Application number: US209933A
Authority: US
Inventors: Robert T Romine
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-08-01
Filing date: 1927-08-01
Publication date: 1930-01-28
Anticipated expiration: 1947-01-28

Description

Jan. 28, 1930.v R. TROMINE.

PORTABLE 'STACK LINER 2 Sheets-Sheet '2 o L-v-'ugoi A Wj,

I xttafneys Patented Jan; v2`8, 1930 UNITED' STATES ROBERT T. ROMINE, OF vMUNT CLEMENS, MICHIGAN PORTABLE STACK LIFTER Application filed August This invention relates to aportable stack lifter or crane capable of being propelled through relati-vely low doorways orf4 where restricted overhead room is provided. This stack lifter is particularly adapted to be carried into or out of a freight car and is constructed to lift heavy loads from the Hoor of the car onto a truck platform or other conveying medium, or vice versa.

An object of the invention is to provide a stack lifter of the foregoing character capable of having its height increased to cnable it to handle loads of" abnormal size.

Another object of the invention is to proported upon the lift truck platform.

Other objects of this invention will ap` pear in the following description and ap'- pended claims, reference being had to the accompanying drawings forming a part of'thls specification wherein like reference characters designate 'corresponding parts in the several views. l

In the drawings: Fig. l is a side elevation ofthe stack lifter or crane embodying my invention with the v parts in their relative normal positions.

Fig. 2 is an end elevation of the construction shown in Figl 1.

Fig. 3 is a view similar to Fig. l showing position.

Fig. 4 is an end elevation of the stack lifter of Fig. 3. A

' Fig. 5 is a section takenalong the'line 5, 5

of Fig. 3.

Before explaining in detail the present invention, and the method 4or mode of operation embodied therein, it is to be understood that the'invention is,not limited in its application to the details, of construction `and arrangement of parts illustrated in the accompanying drawings, since the invention is eapable of otherl embodiments and of being vpracticed or carried out in various ways. Also it is to' be understood that the phrasevide the stack lifter supporting leg structure with means to be engaged by a lift truck platform for increasing the height of the stackthe stack lifter in its elevated oradjusted 1', 19'27'. serial 209,933.

oiogy employed herein is for the purpose of description and not of limitation, and itis not intended to limit the invention beyond the terms of the several claims hereto appended or the requirements ofthe prior art. -The portable stack lifter or crane embodying my invention is shown as a whole at =V and comprises a substantially arch-shaped frame having four spaced side supports or legs, such as apair of front legs A and a similar pair of rear legs A?. Each 'leg or' support is preferably identical in construction, comprising a pair of front and rear parallel structural steel angle bars 10 and 11 respectively.

' The top frame of the stack lifter comprises al pair of end transverse angle bars 12 and a pair of longitudinal side angles 13. To provide an intermediate floor -or supporting frame'located below the top` frame, transverse channel bars 14 at the front and rear i ends of the stack lifter and longitudinal channels 15 at opposite sides of the frame work, are provided. The vertical leg members l0 and 11 and the

members

12, 13, 14, and 15 are rigidly connected together by means of gussetl plates 16and.17 provided on opposite sides andends, respectively, at the top of the frame 4work ofthe stack lifter. l Hou'sedwithin the frame work at the 'upper end is the hoisting mechanism, including reduction gearing, lifting drums and an'electricpmotor, all of these'last-mentioiied parts being shown and described in my co-pending application Serial No. 133,374,1iled September 3, 1926. The

stack lifter is provided with a pair of lifting S5 bars or members B which support at opposite ends sheaves or pulley wheels C." Gables D pass about the sheaves Cv and are adapted to be wound upon' the winding drumsE. In order to lift and lower the'bars-C, the electric 99 motor M is operated and servesto wind or release the cables D thi-ou h the medium of the hoisting mechanism a ove referred to. A control lever G is provided for .the purpose of supplying or'cutting oil"` the electric cur- "w rent for.operating themotor.

Each angle 11 is providedwith a brackets 18 and a guide member 19' preferably lin the formpf an angle and having vertically alined t guide holes through which extends the verti'- 10" cal stem 21, ofa lifting dog 20, this stem be- Ling provided with a plurality of holes or apertures 21. A removable pin 22 carried by each bracket is adapted to enter any one of the apertures 211 to maintain the lifting dogs 20 in adjusted position.

The lower ends of the side supports or legs A and A1 are preferably provided with extensions F comprising a pair of relatively

large channel members

23 and 24 the overlapping flanges of which are preferably secured together by means of rivets. The leg extensions or channels are connected together in pairs by means of a metal bar or connecting member 25 provided with pairs of holes or a ertures at opposite ends. These bar and eg extensions are releasably secured in vertically adusted position to the legs A and A1 b meansof pins 34 insertable through any i of t e pairs of holes 1()a and 11a. A foot or ed caster wheels 27 and 28 are provided.

Each front caster'wheel 2,7 is supported by means of a bracket 29 carried by the front leg extension F and each rear caster wheel 28 is mounted upon a'pivoted arm 30 connected with the lower end of the rear leg extension F. The caster wheel 27 is normally urged downwardly into contact with the ground by means of a coil spring 27. The caster wheel 28 is maintained normally in contact with the ground by means of a spring 28a surrounding a rod or stem 31 carried by the forward end of the pivoted arm 30 and slidably connected with the member 25 at its upper end through the medium of a bracket 32.

From the foregoing it will be seen that the slidable leg extensions F together with the interconnecting bar 25, support the, spring pressedcaster wheels of the stack lifter.

The lower ends of the

vertical angles

10 and 11 of the forward and rear leg members are provided with a vseries of holes or apertures 10aL and 11V". I y

When it is desirable to increase the height of the stack lifter, it is merely necessary to.

move an industrial truck T having an elevating or lift platform L into position between the spaced legs of the stack lifter as shown in Fig. 2.' The lifting dogs 20 are then brought into engagement withthe top of the lift 'platform and held in adjusted position by means of the pins 22. The ins 34 carried by the inembers 25 are release and the platform L elevated to move the legs A and A1 of thestack lifter upwardly relatively to the leg extensions'F until the height of.

the stack lifter has been reached, whereupon the pins 34 are replaced and maintain the parts in their adjusted positions. The diain readiness for use. The reverse of this opso` eration is employed to decrease the height of.

the stack lifter. j

In Figs. l and 2 I have shown the stack lifter in its normal position offse with the legs. and extensions telescopin sg. that the lower ends of the legs A and 1 engage the web or base portion of the plates 24. In Figs. 3 and 4 I have shown the stack lifter in an elevated or extended position the lower ends of the legs A and A1 being shown by the dotted lines 100.

The present stack lifter is particularly adapted to be carried into and out of a freight car on the lift platform L of thetruck T. Owing to the fact'that the freight car doorways have a certain maximum overhead clearance the normal height of the stack lifter is determined by the height of the car doorway. This invention however permits the stack lifter to be carried thru such doorways and the height of the stack lifter to be increased within the car so as to increase the heightvof the crane bay beneath the hoistingmechanism thely permitting loads or packs of abnormal height to be lifted from the car floor.

What I claim is:

1. A ortable stack lifter comprising an arched rame having legs spaced to permit the introduction therebetween of a lift truck platform, hoisting mechanism carried at the4 top of the frame, telesco icextensions carried by the lower ends o said le s for permitting the height ofthe stack ifterto be varied, caster wheels mounted on said eX'- tensions, and adjustable lifting dogs carried by said'legs and adapted to overlie said truck platform.

2. Ina portablecrane, an. arched frame having depending pairs of vertical legs, each leg comprising a ,main section and a teleloo scopic section one located within-.the area of Y the other, a'bar rigidly connecting each pairof telescopicleg sections .at a side of `the frame,.a caster wheel structure supported by the bar and telescopic sections,l and means 'carried by the 'main legsections ada ted to cooperate with a lifting device to ena le the frame to be lifted vertically and to permit adj ustm'ent ofsaid telescopic sections.

a pair of legs, a wheel carrying support piv- 3. In a portable crane, v an arched frame having spaced pairs of legs, a bar connecting a pair of legs and slidable vertically thereon,

legextensions carried by said bar and slidable vertically therewith, and a pairof wheel carrying supports carried by said bar.

4. In a portable crane, an arched frame having spaced pairs of legs, a bar connecting a pair of legs and slidable vertically thereon, leg extensions carried by the bar, and a spring mounted wheel carrying support connected'pto a leg 'extension and yieldable vertically relatively to said bar. 1

5. In a portable crane an arched frame having spaced pairs of legs, a bar connecting oted to a leg beneath said bar, and a spring between said support and bar to resist swinging movement of the support relatively to the bar.

6. In a portable crane, an arched frame having depending pairs of legs s paced to provide a crane bay, a bar connectlng each'pair v lof legs ,and slidable vertically relatlvely thereto, le extensions connected to said bar,

and sli'da le vertically therewith, devices I carried by saidlegs above the bar and leg eX- tensions and adjustable into position to cooperate with a lifting means-to enable the frame to be lifted or lowered vertically thereby to permit adjustment of saidleg exten- In testimony whereof Iv alx my signature.

ROBERT T. 'ROMINE