US1521764A - Lifting jack - Google Patents

Description

Jan. '6. 1925. 1,521,764

w. if. GRAVER l 4LITIm'r JACK Filed. Sept. 5. 1922 Lz A Patented Jan. 6, 192s.

UNITED STATES wWILLIAM I'. GRAVEBCHICAGQ ILLINOIS.'

mme' nox.

Application tiled September 5, 1922. Serial No. 586,240.

To all' whom it mag/ concerm YBe it known that I, WILLIAMv F. GRAVER,

citizen of the United States, residingt at Chicago, in the county of Cook and ate of Illinois, have invented a certain new and useful Improvement in Lifting Jacks, of

which the following is a full, clear, concise, and exact description. i

low pedestal open at its top to permit the rack supporting body of the ack to project upwardly therethrough and also at one side sufficiently to permit of the sidewise insertion of the lower part of the rack supporting body. This pedestal has formations therein for supporting the rack supporting body at selected heights with sufficient space above each formation to receive the lateral extensions that4 are commonly found upon the bottoms of such rack supporting bodies.

In the preferred embodiment of the invention the supporting formations are in the nature of ledges located one above another. In order that there may be no lateral displacement of the jack after it is adjusted upon its pedestal the ledges or other supporting formations are u wardly extended at the open side of the pe estal. The invention will be more fully explained by reference to the accompanying drawing in which Fi 1 is a side view of a lifting jack withct e preferred form of pedestal lof my invention shown in section; Fig. 2 is a front view of the lifting jack with its pedestal shown partially in elevation and partially in section; Fig. 3 is a Sectional view on line 3 3 of Fig. 1; and Fig. 4 is a perspective View of the pedestal.

Like parts are indicated by similar charn acters of reference throughout the differen j may be moved by means of a lever 3 operating through any suitable form of gearing such as that indicated at 4. The supporting body is laterally extended at its bottom, as

5 indicated at 5.

The hollow pedestal 6 illustrated is open at its top to permit the rack supporting body to project upwardly therethrough. It is also open at one side to permit of the sidewise insertion of the lower part of the rack supporting body. The supporting formations for the rack supportingy body are desirably in the nature of ledges 7, 8 Iand 9 1,521,764, PAT EN1 orales.

that are integrallyvcast or otherwise disposed upon and within the pedestal. The bottom l0 of the pedestal may also be em-v ployed to support the rack supporting body in its first stage of lifting adjustment. The

ledges are upwardly projected lat the open side of the pedestal, as indicated at 11, and the pedestal bottom has upward projections 1 2 Ialso at the open side of the pedestal. The projections 11 or 12 serve to prevent the rack supporting body of the jack from moving laterally out of the pedestal except when the bottom of the rack supporting body of the jack is lifted to be in register wit-h the spaces above those projections and through which spaces the base ofthe rack supporting body is passed to the selected level of llfting adjustment desired for the rack supporting body. l

The top of the pedestal is desir-ably inwardly extended (as indicated at 13) suffi'- ciently to enable it also to support the jack, in extreme cases.

rlyhe device of my invention is of particular service in connection with lifting jacks that are employed in conjunction with automobiles, the hollow pedestal enabling the i ularly described the preferred embodiment of my invention I do not wish to be limited to the precise details of construction shown as changes may readily be made without departing from the spirit of my invention, but having thus described my invention I claim as 'new and desire to secure by Letters Patent the following:- v

1. The combination with a lifting Vjack whose rack-supporting body is laterally extended at its bottom; of a hollow pedestal openv at its top to permit the rack supporting body to project upwardly therethrough and also -at one side sufficiently to permit n of the sidewise insertion of the lower part of the rack sup orting body into the interior of the pedestal, the pedestal having ledges therein for supporting said body at selected heights Iandllocated one above another, with sufficient space above each to receive the extended bottoni of the rack supporting body, said ledges having upwardly extending projections at the open side of the pedestal to retain the rack sup porting body.

2. rThe combination with a liftmg jack whose rack supporting body is laterall eX tended at its bottom; of ya hollow pe estal open at its top to permit the rack supporting body to project upwardly therethrough, and also at one side sufliciently to permit of the sidewise insertion of the lower part of the rack supporting body into the interior of the pedestal, the pedestal having a ledge therein with suliicient space above and below it to receive the extended bottom of the rack supportinfr body, said ledge being upwardly projectedJ at the open side of the pedestal to reta-in the rack supporting body.

3. The combination with a lifting jack whose rack supporting body is laterall extended at its bottom; of a hollow pe estal open at its top to permit the rack supporting body to project upwardly therethrough and also at one side /su-ciently to permit ont the sidewise insertion of the lower, part of the rack supporting bod into the interior of the pedestal, the pe estal having supporting formations therein for supporting said body at selected heights located one above another, with suiiicient space Iabove each to receive the extended bottom of the rack supporting body, said formations having upwardly extending projections at the open side of the pedestal to retain the rack supporting body.

ln witness whereof, l hereunto subscribe my name this 31st day of August A. D.,

WILLIAM F. GRAVEB.

Images