US2620737A

US2620737A - All purpose hydraulic jack

Info

Publication number: US2620737A
Authority: US
Inventors: Roy G Miller
Original assignee: Individual
Current assignee: Individual
Priority date: 1947-09-11
Filing date: 1947-09-11
Publication date: 1952-12-09
Anticipated expiration: 1969-12-09

Description

Dec. 9, 1952 2,620,737

ALL PURPOSE HYDRAULIC JACK Filed Sept. 11, 1947 2 SHEETSSHEET 1 6-1 INVETOR.

F? a G. M2! [er ATTDRN EYS Dec. 9, 1952 R. a. MILLER ALL PURPOSE HYDRAULIC JACK 2 SHEETSSHEET 2 Filed Sept. 11, 1947 Z 3 3 A k Q E 9 4 1 4 5 a 3 0 5 2 5 a m I 1O z 5 y 2 6 1 H 1 N 3 w m5 JELWIII IIIIFH 2 H 2 3 1/ 1 m 9 4 M H W,- 3 3 2 H ||||||1||l||l|| 1 8 H a H 2 3 3 4 W 2 1+ m I m a H 1 a w H INVENTOR. Po G. Miller ATTD RN EYE Patented Dec. 9, 1952 UNITED STATES PATENT OFFICE ALL PURPOSE HYDRAULIC JACK Roy G. Miller, Tacoma, Wash.

Application September 11, 1947, Serial No. 773,401

4 Claims. 1

This invention relates to'a hydraulic jack.

It is an object of the present invention to provide a hydraulic jack adapted for use about vehicles wherein the extending parts are mounted on the fluid supply chamber and the pump parts are located within the fluid supply chamber and surrounded at all times by the fluid and wherein the operating crank extended to the side of the fluid supply chamber can be angled or adjusted to render the handle more available for operation at any position.

This application is a continuation in part of my copending application on a body jack, filed June 12, 1946, under Serial No. 676,147 and issued on February 14, 1950, to Letters Patent No. 2,497,836.

It is another object of the present invention to provide a hydraulic jack which can be converted to a jack more adapted for operating on the body parts by the simple attachment of the body engaging parts with the jack and with the extensible part thereof which is adapted to work the body engaging parts. I

Other objects of the present invention are to provide an all purpose hydraulic jack which is of simple construction, inexpensive to manufacture and eflicient in operation.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which:

Fig. 1 is a side elevational view of my all purpose jack with bodyengaging parts connected therewith.

Fig. 2 is a side elevational view with the body engaging parts contracted.

Fig. 3 is an enlarged cross-sectional view taken through the tank and the extensible parts.

Fig. 4 is a transverse cross-sectional view taken through'the pump support within the fluid supply tank, taken on line 4-4 of Fig. 3.

Fig. 5 is a transverse cross-sectional view taken through the retaining device between the pump piston and its valve sleeve or cylinder and as viewed on line 5-5 of Fig. 3.

Fig. 6 is a fragmentary end elevational view or the jack looking upon the handle and illustrating the same adjusted to a. position removed from the vertical.

Referring now to the figures, I0 represents a fluid supply tank of a box-like nature and having a flat bottom for resting upon the ground. Extending upwardly from the top of the box is a cylinder or sleeve I I out of which may be adjusted a plunger 12 having a tight fit with the interior of the sleeve l l and having a piston on its bottom end as indicated at l3 and a cup-shaped washer 14 adapted to prevent leakage of oil past the piston I3 of the plunger. This washer is retained in place on the plunger by a plate l5 and a nut [6 extended upon a threaded projection I! on the end of the plunger I3. Beneath the plunger i2 is a chamber l8 into which fluid under pressure is extended to lift the plunger l2.

Extending from one end of the supply chamber or tank I0 is a sleeve 2| having on its outer end a long sleeve 22 with a bottom 23 therein. The bottom 23 is secured as by welding 24 to the supporting sleeve 2|. The outer end of the sleeve 22 is threaded as indicated at 25 to receive a cap 26 through which a piston rod 21 is extended.

The sleeve 22 has openings 26' therein through which the oil or fluid can enter the same. The oil within the tank is kept always at a high level and above the sleeve 22 even though the oil may be extended to the chamber I8 and the plunger 12 removed to its high location. Workable within the sleeve 22 is a secondary sleeve or pump cylinder 21' having a projection 28 on one end and a pilot projection 29 extending therefrom and through a hole in the bottom 23 of the sleeve 22. About the projection 28 is a spring 3| for returning the sleeve 21 to a position toward the opposite end of the sleeve 22 upon the release of the pump handle 32 connected with rod 21 as indicated at 33. When the pump cylinder. 21 has been returned openings 34 therein will be aligned with openings 23' in the sleeve 22 whereby oil will be permitted to enter the pump cylinder 21'.

On the cylinder 21' is a groove 35 adapted to be engaged by balls 36 pressed outwardly and radially of an opening 31 within piston 38 and secured to the rod 21. This retaining arrangement will cause the cylinder 21 to be pressed forwardly at the beginning of the handle stroke whereby to unseat the oil openings 26' and 34 respectively in the sleeve 22 and cylinder 21' and which upon reaching the end of the stroke and after the spring 3| has been compressed, will permit the piston 38 to be released so that oil within the cylinder2l' will be forced upwardly through an opening 39 and passage 4|, past check valve 42 to the chamber I8 whereby to cause the plunger l2 to rise. The pumping operation is continued until the plunger l2 has been extended to the desired position. Thereafter when it is desired to lower the plunger, a hand and spring pressed valve 43 is pulled to dump the oil into the tank Ill. The tank 10 is fllled to a plug opening 44. The piston 38 is supplied with a wiper 45.

In order that the handle 32 can be turned to a, more convenient operating position, bracket 48 on which the lower end of the handle 32 is pivoted is formed on a circular plate 49 which is held by flanged cleats 51 secured over closure plate 52 and upon the end of the tank by fastening screws 53. The closure plate 52 has a packing device 54 through which the piston rod 21A slides. Accordingly plate 49 can turn to any position as shown in dot and dash lines in Fig. 6 whereby it can be more convenient to operate the same.

Into the upper end of the plunger l2 there is threaded a head 56 having a point 57 therein adapted to engage a body part to be lifted.

Upon the top of the tank there are provided projections 58 having openings 59 therein and adapted to receive respectively hook ends 6| of body engaging parts 62 extending upwardly along the sides of the cylinder I l and connected to the head 56 by links 63 whereby the parts 62 will be expanded outwardly as the head 56 is moved upwardly and so that the parts may assume a position as shown in Fig. 1. The point 57 of the head has at opposite sides of the same grooves 64 in which the ends of the links 63 will be slid downwardly as the head 56 is raised. The construction and operation of the body engaging parts are described in detail in my Letters Patent referred to hereinbefore. The parts 62 will be returned to their positions as shown in Fig. 2 by tension spring 66 as the plunger 12 and its head 56 are lowered. The

parts

62 and 56 can be readily removed when they are not desired. Accordingly there has been provided a jack which can have body engaging parts attached to it to convert the jack into a body jack serving to separate parts as the jack plunger is lifted.

While various changes may be made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention.

I claim:

1. A hydraulic pump comprising, in combination, a fluid reservoir, a sleeve mounted therein, an outlet in the sleeve projecting externally of the reservoir, a pump cylinder mounted slidably within the sleeve, 3, piston mounted slidably within the cylinder, an outlet in the cylinder arranged to register with the sleeve outlet when the cylinder is in its forward position, and an inlet in the sleeve and an inlet in the cylinder, the said inlets being arranged to register when the. cylinder is in its rearward position whereby to admit fluid from the reservoir into the cylinder, the sleeve being moved forwardly by the initial forward movement of the piston whereby to align the outlets and misalign the inlets.

2. A hydraulic pump comprisinug, in combination, a fluid reservoir, a sleeve mounted therein, an outlet in the sleeve projecting externally of the reservoir, a pump cylinder mounted slidably within the sleeve, a piston mounted slidably within the cylinder, an outlet in the cylinder arranged to register with the sleeve outlet when the cylinder is in its forward position, an inlet in the sleeve and an inlet in the cylinder, the said inlets being arranged to register when the cylinder is in its rearward position whereby to admit 4 fluid from the reservoir into the cylinder, the sleeve being moved forwardly by the initial forward movement of the piston whereby to align the outlets and misalign the inlets, and inlet means in the reservoir for returning the pumped fluid to the latter.

3. A hydraulic pump comprising, in combination, a fluid reservoir, a sleeve mounted therein, an outlet in the sleeve projecting externally of the reservoir, a pump cylinder mounted slidably within the sleeve, a, piston mounted slidably within the cylinder, an outlet in the cylinder arranged to register with the sleeve outlet when the cylinder is in its forward position, an inlet in the sleeve and an inlet in the cylinder, the said inlets being arranged to register when the cylinder is in its rearward position whereby to admit fluid from the reservoir into the cylinder, retainer means releasably interengaging the cylinder and piston whereby to move the cylinder forwardly upon initial forward movement of the piston, and resilient means between the sleeve and cylinder for urging the latter toward its rearward position.

4. A hydraulic pump comprising, in combination, a fluid reservoir, a sleeve mounted therein,

an outlet in the sleeve projecting externally of.

the reservoir, a pump cylinder mounted slidably within the sleeve, a piston mounted slidably within the cylinder, an outlet in the cylinder arranged to register with the sleeve outlet when the cylinder is in its forward position, an inlet in the sleeve and an inlet in the cylinder, the said inlets being arranged to register when the cylinder is in its rearward position whereby to admit fluid from the reservoir into the cylinder, the sleeve being moved forwardly by the initial forward movement of the piston whereby to align the outlets and misalign the inlets, rod means connecting the piston and extending outwardly of the reservoir, a plate mounted externally of the reservoir for rotation about the rod means, and a lever mounted pivotally upon the plate and connected to the piston rod, whereby to afford reciprocation of the piston in any angular position of the lever.

ROY G. MILLER.

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

UNITED STATES PATENTS Number