US1457009A - Lifting apparatus - Google Patents

Description

May 29, 1923.

A E STARIK LIFTING APPARATUS Filed Dewlis, 1921 INVENTOR /7/0/0f /a// ATTORNEY Patented May 29, 1923. i

N l T" Lil: i T

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v lAnonrn E. sTAnIK, or LAKEWOOD, oHIo.

LIirrINGr` APPARATUS.

Application led December 15, 1921.

To-aZZ whom t may con-cern.'

Be it known that I, ADoLrH kE. STARIK, a citizen of the United States, and resident of Lakewood, county of Cuyahoga, and StateV of Ohio, have invented a new and'useful Improvement in Lifting which thel following is a specification.

My invention relates to lifting mechanisms generally and to toggle-joint lifting mechanisms particularly.

The predominating objects of my invention are; large lifting range, ease of lifting a load, variation of speed and power for lifting, ease `of adhesion and adaptability of the shoes to the fioor or ground, large bearing area upon the Hoor or ground, ease of movement of the shoes on the floor or ground, compactness of the apparatus `when notl lin, use, adaptability to hold the apparatus in adjusted position without the screw, mitigation of slippageof the lifted object, efficiency of'o eration, and durability of the apparatus. ther'o'bjects and advantages will become apparent during the Aperusal of the specification.

I attain these objects by the mechanism shown in the accompanying drawings which show my invention, as one embodiment, in a vehicle lifting jack, and in which drawings, F ig. 1 is a gene-ral side view of a lifting jack and indicating in dotted lines the highest and lowest positions of thel head; Fig. 2 is a side end view ofv Fig. 1'; Fig. 3 is a section on line 3 3 of Fig. 1; Fig. 4 is a tion on line 4 4 of Flig. 1;Y and Fig. 5 is a jsierspective view of a modiedflock bar.'

imilarreference characters refer to simiparts throughout the views. The vehicle lifting jack, selected ltov illustrate the present' invention and shown in the drawings, consists rincipally of the head A, the legs B and E,fthe swivel nutsv F the lock bar J. Y

The head A may be of any suitable material and, in the present instance, is formed with the anged portion "10 adapted to engagethe vehicle axle 11, and with two ears 12 and 13 which are provided withholes the purpose of which will appear hereinafter.

The legs Band C are duplicates andmay be made ofv any suitable material. Eachy of these legs is formed, at the to ,with a pair of ears 14 which stracldle 'the ears 12- and 13 and which have holes through which vlthe i pivot pins 16' and 17 Apparatus, of

Vexcept that one has other a left hand thread and may b e made Sec- the shoes D andr and thescrew H, and" seria; No. 522,489.

pass.` Thesepins also pass through the aforesaid holes in the ears 12 and-13, so that this portion of ythe structure forms a head.y

`Along the middle portion, each leg has the pivoty joint for the legson `the side members 18 andj19, and the aperture 20, Y

and the notches 21 and 22 in the side mem-` bers 18 and 19. c

At the bottom, each leg is providedV with a pair of vears`23 .which have holes for the purpose hereinafter set forth.`

The shoes D and E are duplicates and may be'made of any body 24 of each shoe has the downwardly projecting ears 25 andthe upwardly pro-A jecting ears 26, all of which' ears arefprovided with holes for the purpose hereinafter appearing.V v

The `pivot pins 27V pass-through theholes inthe ears 23 and 26 and thereby form a the legs.

The pins 28 have sprocket .teet vf Y The chain 30, either ordinary-sprocket link chain preferably lwith solid central web 31, or of a designsimilar to a track-laying tractor chain, orv other chain which, preferably, provides a large bearing surface of thev floor' or ground, is disposed over the rollers 29. l

"The swivel nuts F. and Gareduplicaltes a right hand andthe of any suitablematerial. The body32 of` these nuts has a threaded opening for the screw H and is adapted to enter the aperture 20, and has the trunnions 33 and 34 which are radapted to journal in the notches 21 and v22. l The screw H', made of suitable material, has a rightand left 'hand thread, preferablysquare threads, andl lalso has the crank 35 wherewith the screw is rotated; 'v It is noted here that the screw H and the nuts vF and@ form lone unit which may readily be Vdetached vfrom thel apparatus by lifting lthe'sa'me out of thefnotches.

' The lock bar J, 'made of suitable material,` hasthe body 36, thebent downportions 3T, and the hooks 3S.' The portions 37 and 38 being adapted to engage vthe legs B and C on the outside where they. .can indlodging'or holding place on the wallsof the notches pass through the ears 25jand y i carryy the rollers29 which may or'maynot suitable material.` Thel and where they can slide up and down as the legs are manipulated.

Then preferred, or when it is desired to provide al more positive lock for the legs, the bar J may be made as shown in Fig. 5 where the body 39 has the round and inclined bent down ends 40 which lit into the not- ches 21 and 22.

The operation of the apparatus shown and described is as follows:

lVhen it is desired to fold this apparatus, lift the screw with the nuts out of the notches in the legs, then close the legs and let the lock bar slide down on the legs or insert the round ends i0 in the lower notches whereby the apparatus is locked in compact forni for storage which is a desirable feature particularly in connection with vehicles which carry lifting jacks.

-When it is desired to raise an object with this apparatus, place the apparatus without the screw under the object, then manually close the legs until the head touches the object at which point the lock bar has slidden down on the legs and holds .them in this particular position (if the round end bar is used, the round ends are inserted into the nearest notches which need not necessarily be in notches exactly opposite each other since the lock bar may be placed-in an inclined position) then adjust the nuts on the screw so that they will enter the lowermost notches which permit the crank on the screw to rotate without striking the ground, then rotate the screw by means of the crank, whereupon the head will move upward and raise the object.

lVhen it is desired to change the speed or the power required while raising this object, the screw and nuts may be changed from one pair of notches to another during the operation since the lock bar holds the legs in any position and the screw can be removed without disturbing the legs and placed lin another pair of notches, either upward or downward, whereby the speed and the power required will be changed.

lVhen it is desired to lower an object which has been raised with this apparatus, place the screw in a convenient pair of notches, then rotate the screw suiiiciently so that it will temporarily hold the legs in position, then slide the lock bar upward (or remove the round ended one) to release the loclr, then rotate the screw to lower the head and consequently the object.

lt is noted that the chain on the shoes piovides not only a large bearing surface for the ground. but also mitigates friction between the shoe and the Iground when the apparatus is in operation, thereby conserving power in raising or lowering an object as well as preventingthe shoes from digging into the ground which is a very desirable feature particularly in vehicles.

'it is further noted that this apparatus has two shoes, spaced apart, whereby the object, particularly a vehicle, is prevented from moving longitudinally after it is raised, unlilre the one shoe jack which does not prevent, but rather increases, the possibility of such longitudinal movement. lf, for any reason, the vehicle did have a tendency to so move, a peg or nail or other object may be inserted between the chain links and abutting on the edge of the legs or elsewhere whereby the movement of the chain is prevented.

The apparatus shown and described cai'- ries out the objects herein set forth and is susceptible to modifications as to struct-ure and application. Therefore, without limiting myself to the precise construction shown and described,

l. An apparatus of the character described, comprising ahead, a pair of legs pivoted on said head, a shoe pivoted on the lower end of each of said legs and provided` with movable ground engaging means, and means for moving said legs on said pivot.

2. An apparatus of the character described, coniprising a. head, a pair of legs pivoted on said head, a shoe pivoted on the lower endo-f each of said legs and each shoe provided with a traclr laying chain, and means for moving saidy legs on said pivot.

3. An apparatus of the character ydescribed, comprising a head, a pair of legs pivoted on said head and each leg provided with a series of notches, a ground engaging means on the lower end of each of said legs,`

a swivel nut mounted in each of said legs and each nut adapted to journal in said notches, and a screw adapted to engage said nuts to move said legs about said pivot.

et. An apparatus Vof the character described, comprising a head, a pair of legs pivoted on said head and eachV leg provided with a series of notches, a ground engaging means on the lower end'of each of said legs, and a screw provided with a pair of nuts each of which is adapted to journal inv said notches.

5. An apparatus of the character described composed of two units, one of said units comprising a head, a pair ofv legs pivoted on said head and each leg provided' with a series of notches, a ground engaging means on the lower end of each of said legs,

and the other ofsaid units comprising a' screw provided with a pair of nuts each o't which is adapted to journal in said notches and said pair of nuts adapt-edy to engage any set of said notches. L' 6. An apparatus of the character described, comprising a head, a pair of legs pivoted on said head, a shoe pivoted on the lower end of each of said legs and each shoe provided with a tracklaying chain, means for moving said legs on their said pivots,

anda lock bar adapted to hold said legs in adjusted position.

An apparatus of the character described, comprising a head, a pair of legs: i pivoted on said head, a shoe pivoted on the lower end of each of said legs and each..

shoe provided with a track laying chain, a swivel nut mounted in each of said legs, a

screw adapted to engage said nuts and move said legs on their said pivots, and a lock bar adapted to hold said legs inl adjusted position.

8. An apparatus of the character described, comprising a head, a pair orlegs pivoted on said head, a shoe pivotedv onthe lower end of each of said legs and each shoe provided with a track laying chain, a removable screw and nut means adapted to engage said legs and move the same on their.

said'pivots, and a lock bar adapted to hold said legs in adjusted position.

9. An apparatus y of the character dee scribed, comprising a head, a pair of legs pivoted on said head, a shoe pivoted on ther lower end of each ofsaid legs and each shoe provided with a tracklaying chain, a removj able and locally adjustable screw. and nut means for movingsaid legs on their said pivoted onv vsaid head and provided' with notches, a shoe'pivoted on the lower end of each `Vof said legs and each shoe provided witha tracklaying chain, a pair of swivel nuts and each nut adapted to journal vin any ofv said notches, a screw through said nuts, and. a lock bar adapted to engage' said legs at different locations to hold` thesame inl adjusted position.

`^LiDoLPH STARIK."

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