US1853155A - Suspension jack - Google Patents

Description

April 12, 1932. Hl VAN DYKEN SUSPENSION JACK Filed Oct. 7. '1929 Patented Apr. 1,2., 1932.@

PATENT oFFIciE. g

EARRYVAN DYKEN, OFITWO HARBOR/S, MINNESOTA SUSPENSION y JACK 1 application med october 7, 1929. serial No. 393,062.

My inventionrelates to jacks and more j especially to suspension'jacks in which the operating parts are below the level of the supporting member. In the assembling and repairingof heavy vehicles such as railway locomotives and the like, it is often necessary to remove and replace heavy members from the lower'parts Vof. the machine, and the limited space prolvided VisV usually insufficient for ordinary types of levers or jacks toassist in these operations. Vhile such work is often done while the machine or engine is over a pit this Y 4situation only aggravates rather than eases ""the situation. My present invention has been devised and `improved to overcome the diicultiesy met under these circumstances and to provide a jack of the suspension type which i. .can be used in connection with a pit or oor opening,and in which the operating parts are below the suspension members,kand providing for lifting of heavy objects from av substantially fiat surface. It is an object of my invention to provide a plane surface.

Another object of myinvention is to provide a jack wherein the operating parts are below the level of the supporting members. y Another object of my invention is to provide a jack adapted to be used in connection with va pit or floor opening.

Further objects and advantages will appear and be brought out more fully in the *following specification, referencebeing had to the accompanying drawings in which- Figure 1 is a side view of a jack embodying my invention;

Figure 2 is an end view of the same; and Figure 3 is a sectional view taken along the lines 3--3 of Figure 1.`

Referring more particularly to the drawings I show a jack comprising a body portion 10, having side plates 11 lwhich are secured "together in spacedv relation by a number of space'bolts 12 and 13. At the top of side plates 11 are bearing plates 14, which are shown as angle iron members and made in- .tegral with sides l1 or suitably secured there- 507"to as by bolts 15. Bearing plates 14 provida jack adapted for the lifting of objects fromy I f the elevating member in any desired position.

ing` outwardly projecting portions, make possible the suspension of the jack in an aperture 16, in a pit plank 17, which plank may be suspended across a pit or other, floor opening suitable for the ydesired use.' An elevating member 18 is'disposed between plates 11 and, as may be' seen from Figure 3is shown as a hollow member andis provided'with a rack 19 disposed along one'side and integrally se-Kl cured thereto. A top plate 20 is secured to the top of elevating member 18, and has an' extended portion 21l for insertion into the hollowportion'of member 18, and is secured in place by lock bolt 22.v The pinion 23 mounted on a shaft 24 is suitably secured between plates 1l, and is 'Xed to shaft 24 and adapted to rotate lwith it. Pinion'23 isv so mounted as to engage the teeth of rack f 19, so that the rotation of pinion 23 will raise or lower rack 19 and with it top plate 20,' and elevating member 18.` Shaft 24 is .provided with la squared portion 25,' to which an operating crank or lever may be attached as desired.V A dog 26 is mounted .on a shaft 27, andarranged to engage rack 19 and hold Anarm` 28"@is secured to shaft'27, and has a knoby or handle 29 at its ou'tere'nd.y Bolts y 13are each provided with afguide roller 30 adapted to guide the elevating member 18 and reducethe friction of its movement.

In operation the pit plank 17 is placed across thepit and with the jack suspended inthe aperture 16 by the supporting `members y14. lVith the elevating member 18 in its lowest position, top plate 20 will rest on bearingV plate 14, and the'locomotive binder' or other parts to be elevated placed on top plate 20. Shaft 24 can then be rotated and, with the cooperation of 'dog.26, elevating' member 18 can'be raised to and held at'any position, as will be clear to anyone familiar with this type of device. To lower the object, member 18 must be first elevated slightly by-operation -of shaft y24, and the dog26 released from rack 19k after which the member 18 can be lowered by the weight of it and its superimposedl load. v

From the foregoing it will be apparent ythat this ack is adapted for all purposes in' which it is desired to lift an object from a plane surface such as a floor, which has a pit or other opening, across which a plank supporting the jack can be placed. The body of the jack and the operating parts are all below the supporting members, and with suicient space provided below the supporting members 14, the jack can be easily andl readily operated as illustrated.

Having described my invention it will" be understood that changes and modilications in the design and construction of the illustrated device may be lnade Without departing from the true scope of lthe invention as set forth in the appended claims;

I claim: A

l. A jack comprising, incombi'nati'ombody' members, supporting members securedy thereto, an elevating member, andy actuating means therefor, said2 supportingmembers being located'adjacei'it the top of said body.

2'. A jack comprising,` in combination, a body"7 portion having separated side members, supporting members connected to said side members adjacent the upper portion thereof, an elevating member disposed'V betweenv said side members, and actuating means for said elevatingmember engaging said side' members and'said elevating member.

3. jackk comprising, in combination, spa'ced supporting members, a body portionV secured to and supported by said supporting members and disposed therebelow, an elevating! member in saidA body portion,.mea'ns for actuati'ngand locking said elevatingmember, anda plurality of roller guides for said ele- Vati`r lme'mber. n

4'. jack comprising, in combination, a plurality' ofy spaced' supporting members, a

ody portion securedtliereto and ,disposed Atlierevbelow,jsaid' body portion' having separatedv side" members', ,v an elevating member" having a rack in said body portion, actuating andlockingV meansy engageable with said rack,

and guide members for said ele'vatir'igv member'.

5. A jack comprising, in combination, a plurality of spaced supportingmembers having a substantially flat upper portion and a do'vvnwardly extending portion, a body portion secured to said downwardly extendingk securedy to the top of said elevating member,

portions of the supporting members, an elongated elevating member disposed within said body portion,A a rack extending along and secured toy said elevating" member, a top plate means for actuating and locking said elevating members, and means for guidingv said elevatin member 6. jack comprising, in combination, supporting lmembers having` a substantially fiat supporting portion and a downwardly extending portion, a body portion having spacedside members secured to' the downwardly extending portions of said supporting members, said side members extending below said supporting members, an elevating member disposed between said side members, guide bearings therefor, a rack extending along and secured to said elevating member, actuating means for said` rack and elevating member comprising, aA pinion carried b said side members, locking means comprising a dog adapted' to enga "e said rack, an operating handle' for said 0g, and a top plate secured to saidfelevatingmembemsaid top plate being adapted to lie substantially in the lane of saidsupporting members when the e evating member is in its retracted position.

Signed at;y Two` Harbors, Minnesota, this 26th day of September, -1929. v v

HARRY VAN'y DYKEN

Images