US3707886A

US3707886A - Arrangement at hydraulic lifting jacks

Info

Publication number: US3707886A
Application number: US00218562A
Authority: US
Inventors: K Flodin
Original assignee: DOMKRAFT NIKE AB
Current assignee: DOMKRAFT NIKE AB
Priority date: 1972-01-17
Filing date: 1972-01-17
Publication date: 1973-01-02
Anticipated expiration: 1990-01-02

Abstract

A manually operable hydraulic jack having a horizontally extending jack body including a pump which is disposed near one end of the jack, a manually operable pumping lever for actuating said pump, said lever being adjustable in length, one end of said lever being connected to said pump by being mounted on an arm which is pivotable about a horizontal axis, said lever being adapted to permit movement between an operating position and an out-of-the-way position, so that in an out-of-the-way position, said second end of said lever extends substantially parallel to said jack body.

Description

United States Patent 1 Flodin 154] ARRANGEMENT AT HYDRAULIC LIFTING JACKS [75] Inventor: 4 Karl Borje Yngve Flodin, Eskilstuna,

Sweden [73] Assignee: Domkraft AB Nike, Eskilstuna,

Sweden [22] Filed: Jan. 17, 1972 [21] Appl. No.1 218,562

Related US. Application Data [63] Continuation of Ser. No. 9,921, Feb. 9, 1970, abandoned.

[52] US. Cl ..74/547, 60/52 HA, 74/525 [51] Int. Cl. ..G05g 1/04 [58] Field of Search ..74/544, 543, 524, 525, 523, 74/547, 546; 60/52 HA, 52 l-[B [56] References Cited UNITED STATES PATENTS Hjermstad ..74/524 UX 1 Jan.2, 1973 Ashton et a1. ..74/525 Belinkin ..60/52 HA Primary Examiner-Milton Kaufman Attorney-Sommers & Young ABSTRACT A manually operable hydraulic jack having a horizontally extending jack body including a pump which is disposed near one end of the jack, a manually operable pumping lever for actuating said pump, said lever being adjustable in length, one end of said lever being connected to said pump by being mounted on an arm which is pivotable about a horizontal axis, said lever being adapted to permit movement between an operating position and an out-of-the-way position, so that in an out-of-the-way position, said second end of said lever extends substantially parallel to said jack body.

5 Claims, 4 Drawing Figures PATENTEUJANZ 1w 3.101.886

sum: or 2 FIG.1

PATENTED 2 sum 2 or '2 FIG.2

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ARRANGEMENT AT HYDRAULIC LIFTING JACKS This application is a continuation of application Ser. No. 9,921, filed Feb. 9, I970, abandoned.

The invention has as its object to produce a pump lever which permanently can be attached to the jack and by simple measures be adjusted to the jack length, and which can be set into a transport position substantially in parallel with the jack in order to facilitate the handling, packing and transport and to save space. This object is achieved in that according to the invention the pump lever is adapted telescopically to be retracted to at least the same length as the jack and rotatably mounted in a pump arm which is included in the pump mechanism and pivotal about a horizontal shaft, said pump arm having two defined locking positions, so that the pump lever by turning can be set into any of said locking positions without being removed from the pump arm.

The invention is described in greater detail in the following with reference to the accompanying drawings showing an embodiment of the invention.

FIG. 1 shows a side view of a jack with a pump lever according to the invention, shown in the figure both in transport and in pumping position,

FIG. 2 shows a section through one end portion of the pump lever,

FIG. 3 shows a section along the line III-III in FIG. 2, and

FIG. 4 shows a section through a detail in FIG. 1.

Referring to FIG. 1, a so-called garage jack of a type known per se and provided with wheels is designated by l. The jack comprises a pump arm 2 adapted to pivot about a shaft 3 within a sector of approx. 80 from the horizontal plane. The pump arm 2 is provided with an axial bore 4 in which the pump lever 5 according to the invention is arranged.

The pump lever comprises an inner portion 6 which preferably is made of solid steel or another suitable material and secured in said bore 4 in pump arm 2 by means of a bayonet catch. Said catch comprises a locking pin 7 mounted in the pump lever through a bore 17 extending through the pump arm 2, and two defined locking positions, preferably offset relative one another by 180, against which the lever is pressed by a spring 8. On said inner portion 6 is mounted movably an outer portion 9 in the form of a tube which at one end is provided with a handle 10 of plastics or rubber. The outer portion 9, in order to limit its movement on the inner portion 6, is provided at the handle end with two impressions 11 located preferably diametrically (FIGS. 2 and 3) for co-operation with the end surface 12 of the inner portion, and at its other end is provided with an internal groove 12 having a conical inlet 14 and a radial surface 15 forming a stop for a resilient ring 16 arranged in a groove in the inner portion 6 (FIG. 1). The extension of the outer portion 9 thus, is stopped when the resilient ring 16 engages with groove 13 in the outer portion, the retraction of the inner portion and outer portion 9 being stopped when the impressions 1 1 get into contact with the end surface 12 of the inner portion.

When a jack is to be used, the pump lever of which is in transport position, the pump lever is shifted from transport position into pumping position by pressing the inner portion 6 of the lever into the bottom of the bore 4 in the ump arm whereafter the Bump lever is turned throng ha f a revolution. Now t e outer portion 9 can be extended until the locking ring 16 engages with groove 13 and locks the pump lever in said extended position.

What I claim is:

l. A manually operable hydraulic jack having a horizontally extending jack body including:

a. a pump,

b. said pump being disposed near one end of said jack,

c. a manually operable pumping lever for actuating said pump,

d. said pumping lever:

1. being adjustable in length to at least the same length as said jack,

2. one end of said lever being connected to said pump by being mounted on an arm which is pivotable about a horizontal axis,

3. said lever being adapted to permit movement between an operating position and an out-ofthe-way position, so that in an out-of-the-way position, said second end of said lever extends substantially parallel to said jack body.

- 2. A jack according to claim 1 wherein said pumping lever is angularly bent adjacent said pump.

3. A jack according to claim 1 wherein said pumping lever is rotatable about the longitudinal axis of said one end of said lever with respect to said arm and being lockable in two angularly opposed positions.

4. A manually operable hydraulic jack according to claim 1 wherein the pumping lever is made up of two separate portions, including; an inner-portion, comprising a bent part of said lever, and an outer portion, comprising a tube movable between two positions axially of said inner .portion,said inner and outer portions being provided with means for limiting the movement of said outer portion between said two positions and for releasably locking said outer portion to said inner portion at least in that position in which said pumping lever is extended.

5. A manually operable hydraulic jack according to claim 4 wherein the inner portion of the pumping lever is mounted in a bore in the arm by means of a bayonet catch having two 180 angularly displaced locking positions and a spring means is mounted between the bottom of the bore and said inner portion, said spring means acting upon said inner portion so as to retain said pumping lever in said locking positions.

Claims

1. A manually operable hydraulic jack having a horizontally extending jack body including: a. a pump, b. said pump being disposed near one end of said jack, c. a manually operable pumping lever for actuating said pump, d. said pumping lever: 1. being adjustable in length to at least the same length as said jack, 2. one end of said lever being connected to said pump by being mounted on an arm which is pivotable about a horizontal axis, 3. said lever being adapted to permit movement between an operating position and an out-of-the-way position, so that in an out-of-the-way position, said second end of said lever extends substantially parallel to said jack body.

2. A jack according to claim 1 wherein said pumping lever is angularly bent adjacent said pump.

3. A jack according to claim 1 wherein said pumping lever is rotatable about the longitudinal axis of said one end of said lever with respect to said arm and being lockable in two 180* angularly opposed positions.

3. said lever being adapted to permit movement between an operating position and an out-of-the-way position, so that in an out-of-the-way position, said second end of said lever extends substantially parallel to said jack body.

4. A manually operable hydraulic jack according to claim 1 wherein the pumping lever is made up of two separate portions, including; an inner portion, comprising a bent part of said lever, and an outer portion, comprising a tube movable between two positions axially of said inner portion, said inner and outer portions being provided with means for limiting the movement of said outer portion between said two positions and for releasably locking said outer portion to said inner portion at least in that position in which said pumping lever is extended.

5. A manually operable hydraulic jack according to claim 4 wherein the inner portion of the pumping lever is mounted in a bore in the arm by means of a bayonet catch having two 180* angularly displaced locking positions and a spring means is mounted between the bottom of the bore and said inner portion, said spring means acting upon said inner portion so as to retain said pumping lever in said locking positions.