US2000503A

US2000503A - Vehicle jack

Info

Publication number: US2000503A
Application number: US732313A
Authority: US
Inventors: Tom C White
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-06-25
Filing date: 1934-06-25
Publication date: 1935-05-07
Anticipated expiration: 1952-05-07

Description

'May 7,1935. Q W TE 2,000,503

VEHICLE JACK Filed June 25, 1934 2 Sheets-Sheet l May 7, 1935. i w n- 2,000,503

r VEHICLE JACK Fil ed June 25, 1954 2 sheets-Sheet 2 Stun/MA;

Patented May 7, 1935' i K UNITED STATES PATENT OFFICE-1 VEHICLE JACK Tom C. White, Billings, Mont. ApplicationJune 25, 1934, Serial No. 732.313

' 12 Claims. (01154-133) This invention relates to lifting jacks, and, tical plate In is bent or curved upwardly from more particularly, to elevating jacks for vehicles its midpoint, so that the ends H and I2 are arwherein the jack head or elevating platform is cuately disposed and the head is substantially self-centering. I concave. Thehead I is mounted or affixed on 5 An object of the invention is to provide'ajack the jack elevating rod by a screw, rack bar, or 5 head which will center itself under the vehicle hydraulic plunger, in a slightly off-center'posiaxle without the necessity of the operator crawltion. The forward portion l3 of the elliptical ing beneath the car to place the head in position. plate Ill is of considerably greater radius than A still further object of the invention is to conthe rear portion H. In forming the head the struct a self-centering jack-head which will befront end [2 is bent or pressed outwardly at the 10 come operative even though the head strikes the portion 13 to form an offset nose or cam surface axle at an angle and one which will insure the l5 on the upper side of the plate. Aside from centering of the axle directly over the elevating mounting the plate l0 off center, the larger forrod and also prevent the car from falling off the ward end I2 is bent upward to a greater height 15 jack-head. J from the horizontal plane of the elevating rod 15 In the drawings Fig. 1 is illustrative of a conthan is the rearward end II. N ventional screw type jack provided with the novel Referring t axle, While self -centering head, a A denotes an automobile spring hanger, or other Fig. 2 is an enlarged side elevation of the head portion of the running gear of an automobile,

supporting the vehicle axle. against which the jack-head is contacted. When 20 Fig. 3 is a vertical cross-section of the head the rounded nose l5, or any other forward p illustrated in Fig. 2. tion of the head l0, strikes the axle A, it will Fig. 4 is a similar head mounted on a rack turn or swivel on the screw 4 and swing the lower bar type of jack. end ll of the head thereunder. Fig. 5 illustrates the self-centering head in Fig. 2 is a view of the axle B after being cen- 25 combination with a hydraulic jack. tered over the head Ill (in reverse position from Fig. 6 is a top plan view of the self-centering Fig. 1). It should be borne in mind that it is head. not necessary for the forward edge of the cam The present invention is rimarily a jack-head face 15 to strike directly on the axle, but any or elevator platform applicable to all types of portion of the nose may contact therewith and 30 vehicle lifting jacks, whether they be operated by the jack-head will immediately and automatian elevating screw, a rack bar, or a hydraulic cally turn and center itself. Thereupon, conpump mechanism. In Fig. 1 the invention is tinued operation of the elevating mechanism will shown asappliedto aconventional screw type jack lift the car.

which comprises a removable ground-engaging Fig. 4 illustrates the'self-centering head swiv- 35 platform I in which is bracketed the enlarged elled on a non-rotating lifting rod by means of base 2. Integrally formed with the base 2 is holcollar 20 and set screw 2| which rides in an low column 3 in which is telescoped screw 4. annular groove 22 formed in the upper end of Suitable pinions 5 and 6 are mounted interiorly of the rack bar 23.

4 casing 1 in the upper portion of the column 3, Fig. 5 is directed to the attachment of the 40 with the screw 4 threaded through the center of self-centering head In to a hydraulic type jack. pinion 5. The pinion 6 is rotated by a detach- The head is afiixed to vertical adjusting screw 25 able shaft 8 which terminates in an extension carried by piston 26 which is elevated through handle. the medium of fluid in cylinder 21, the fluid being Rigidly afiixed to the upper end of the screw compressed by pump 28. The primary adjust- 45 4 is the self-centering jack-head or elevator platment to secure the approximate height being form I0. made by elevating the screw 25, the jack is then Referring to the several views, and particularly merely pushed under the car by its extended to the top plan shown in Fig. 6, it will be seen handle. After becoming centered, as before dethat the head I 0 consists essentially of an elliptiscribed, the pump 28 is operated to elevate piston 50 cally shaped plate having all of its surface edges 26 and lift the vehicle. rounded, so that no portion of the head presents It will be understood by those skilled in the a sharp edge. art that the jackheads or platforms illustrated Referring to Figs. 2 and 3, it will be observed, in the drawings and defined in the appended in side elevation and in vertical section, the ellipclaims may be constructed separately and at- 55 tached to any type of conventional vehicle jack.

What I claim is:

1. A self-centering, lifting head for jackscomprising an upwardly curved, elliptically shaped plate, one end of the curved plate rising to a greater height than the other end of the said plate.

2. A lifting head for jacks comprising an upwardly curved, elliptically shaped plate having all of its surface edges rounded, the upward curve of one end of said plate being of less height than the other end thereof.

3. A lifting head for jacks comprising an upwardly curved, elliptically shaped plate, the surface edges of said plate being rounded and in which the curvature and height of one end of. said plate is greater than the curvature and height of the opposite end of said plate.-

4. In a vehicle jack, an elevating rod, a rotatable, axle-engaging head, said head consisting of an arcuately shaped, elliptical plate supported slightly off center on the upper end of said rod, and a rounded offset section formed on one portion: of said arcuate. plate and. adapted to contact with the axle of a vehicle and. rotate said head to engaging position,v

5'. In anelevating device, a vertically movable rod, an elliptical head eccentricall-y affixed to said rod, said elliptical head being. arcuately bent to present itsends in elevated position above the horizontal plane of the midsection: of said head, one of said ends being bent to a higher elevation than the other of said ends, and a pressedeout portion forming a camface onthe underside of said higher elevated end. 7

6. In a vehicle jack, an. elevating rod, a concave plate mounted for rotation onor with said rod, said plate being of substantially elliptical shape, the end of the elliptical plate having the greater radius rising to a greater height above the end of said rod than does the end of the plate having the smaller radius.

7. An axle-engaging head for vehicle jacks comprising a rounded edged and ended plate, the end portions of the plate being bent upwardly with one of the said upwardly bent ends rising to a greater elevation than the other of said ends, and an outwardly extending nose portion on the outer surface of the end portion having the greater height.

8. In a vehicle jack, an elevating rod, a selflocating lifting head attached thereto, said head comprising a low vehicle engaging portion and an upwardly extending vehicle contacting portion.

9. Irrvehicle jacks, a self-centering head therefor,.said.head including a platform section adapted to support the weight of a vehicle thereon, and an. upstanding section adapted to contact and be arrested by the portion of the vehicle to be lifted prior to the actual lifting thereof.

10. In: a self-centering and self-arrestinghaad for vehicle jack-s, a weight supporting platform integrally formed in one portion of said head, and an upwardly extending offset portion. in-

tegrally formed. in another portion of said. head.

1.1 A vehicle jack including a lifting rod, 8. self-centering head attached to the upper end thereof, said, head having a vehicle supporting portion substantially in the plane of the upper terminus of said lifting. rod and head centering portion in. a plane above the upper terminus of said rod.

12.]A. vehicle jack including a lifting rod, a self-1ocating lifting head attached to the upper end thereof, said head comprising a base plate adaptedi'tc engage a portion of a vehicle, the central portion: and one end. of. said plate being in a substantially lower horizontal plane than the opposite end of said. plate.

TOM C. WHITE.