US2516483A

US2516483A - Centering lift jack

Info

Publication number: US2516483A
Application number: US669877A
Authority: US
Inventors: Grant N Parker
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-05-15
Filing date: 1946-05-15
Publication date: 1950-07-25
Anticipated expiration: 1967-07-25

Description

July 25, 1950 i w, PARKER I 2,516,483

CPNTERING LIFT JACK Filed My 15, 1946 INVENTOR. ZZ/a Zzer Parker ATTD RN EYS Patented July 25, 1950 CENTERING LIFT JACK Walter Parker, Geneseo, N. Y.'; Grant N dlarker administrator of said Walter Parker, deceased Application May 15, 1946, Serial No. 669,877

1 Claim. 1

The invention relates to a lift jack and mor especially to a centering lift jack fo automobiles or the like.

The primary object of the invention is the provision of a jack of this character, wherein the lift member thereof can be clamped automatically to the part to be lifted by the said jack, so as to prevent the tilting of the latter when the part has been lifted or while lifting th same.

Another object of the invention is the provision of a jack of this character, wherein the clamp for the part is of novel construction and unique in the assembly, whereby it automatically moves to a clamping position when a, load is imposed thereon, and on the freeing of such load the clamp automatically releases itself therefrom.

A further object of the invention is the provision .of a jack of this character, which is simple in construction, thoroughly reliable and efficient in operation, strong, durable, readily and easily operated for the lifting of a load, it being automatically clamped to such load during the lifting operation, and centers the lifting member to the said load, thus eliminating the tilting of the jack, and inexpensive to manufacture.

With these and other objects in view the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing, which discloses the preferred embodiment of the invention and pointed out in the claim hereunto appended.

In the accompanying drawing:

Figure l is an elevation of a jack constructed in accordance with the invention and in initial position for lifting.

Figure 2 is a fragmentary view similar to Figure 1 showing the jack in lifting position.

Figure 3 is a View similar to Figure 2 showing the jack clamped to the axle housing of a motor vehicle.

Figure 4 is a fragmentary side view of the clamp of the jack.

Similar reference characters indicate corresponding parts throughout the several views in the drawing.

Referring to the drawing in detail, the jack constitutin the present invention, comprises a stand base or foundation plate it] from which rises centrally thereof a cylindrical post or column II, it being reinforced by bracing ribs 12, which are joined with the base or plate Ill and such post or column.

Working within the post or column ii is the usual sectionally telescopically interfitted extensible and retractible lift member l3, having a swiveled saddling head or rest M, which is of crescent shape. The lift member I 3 is raised and lowered by a train of driving gears l5, one being in threaded connection therewith and embraces the said member, and has rotatable-bearing fitting with the upper end of the post or column I l, as best seen in Figure 1 of the drawing. The other gear l51of the train is adapted for separable connection to an operating handle bar or the like, not shown, the gears I5 being partially confined in a guard frame l6, which is built to the post or column I I.

The lift member Il3 at the uppermost or outer section IT is manually adjusted to lengthen or shorten such member for increasing or decreasing its lifting range.

The saddling head or rest head M at the terminal horns l-8 thereof has connected by pivots l9 thereto opposed opening and closing clamping jaws 20, both being outwardly bowed and vertically swing to opening and closing relation to each other, and when these are closed they embrace a part, which in Figures 1 and 2 of the drawing is illustrative of an automobile spring denoted in part at 2|, for the centering thereof and the clamping of the jack thereto when such part is lifted thereby.

These jaws '20 are urged by springs 22 to open position, which springs are connected to the pivoted areas of the jaws and to the saddling head or rest [4, these pivotal areas 23 being in the path of the load to be lifted when the jaws are in normal open position, so that an automatic closing action by contact of the load will take place on the lifting thereof, for the clamping of the jaws about the said load while being lifted and in a raised position.

In Figure 3 of the drawing the clamping jaws 20 are shown in clamping engagement about an axle housing 24, and if desirable each jaw can be constructed of a group of sections or segments as denoted at 25, these being independent of one another, and thus the jaw conforming to the contour of the part to be clamped.

What is claimed is:

A lift jack of the kind described, comprising a lift member, a rest head swiveled thereto, a pair of clamping jaws pivoted to said head and carried thereby in opposed relationship to each other, each of said clamping jaws comprising a plurality of separate segments arranged in side-by-side relationship whereby the gripping engagement of the jaws with the load will clampingly conform to the irregularities in the configuration of the load, the engagement of the jaws with the load causing a closing thereof about the load under the lifting action of the lift member, and spring-operated opening means for automatically opening said jaws from about said load upon lowering of the lift member, said spring-operated means comprising a plurality of springson each of saidiaws, there being one rspring for each segment-of said jaw, said springs extending between said rest head and said segments of said jaws, and being under tension when said jaws are clamped around said load.

WALTER PARKER. 15

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 687,620 Goodwin Nov. 26, 1901 1,901,332 Pryor Mar. 14, 1933 2,054,211 White Sept. 15, 1936 10 2,063,060 Sheets Dec; 8, 1936 FOREIGN PATENTS Number Country Date 491,324 Great Britain 1 Aug. 31, 1938 713,530 France Aug. 17, 1931