US1859830A - Hydraulic lifting jack - Google Patents
Hydraulic lifting jack Download PDFInfo
- Publication number
- US1859830A US1859830A US417541A US41754129A US1859830A US 1859830 A US1859830 A US 1859830A US 417541 A US417541 A US 417541A US 41754129 A US41754129 A US 41754129A US 1859830 A US1859830 A US 1859830A
- Authority
- US
- United States
- Prior art keywords
- jack
- lazy
- cylinder
- hydraulic
- lifting jack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/22—Lazy-tongs mechanisms
Definitions
- the object of the invention is to provide an improved hydraulic lifting jack, comprising a double lazy-tongs mechanism which is operated by means of a hydraulic cylinder.
- the hydraulic cylinder is interposed between the members of the upper lazy tongs mechanism, the head of the jack carr in one part of the hydraulic cylinder, pre era bly the cylinder proper, and the middle pivot of the double tongs mechanism carrying the piston of the hydraulic cylinder.
- one hydraulic lifting jack is fixed to the under side of each of the two longitudinal main beams of the chassis of the motor car or other vehicle, preferably in the transverse middle plane of gravity of the car.
- the two jacks may be operated by means of a single pump which may be driven either from the motor of the motor car by means of a suitable clutch, or may also be a hand operated pump.
- the passage of the liquid, preferably oil, supplied by the common pump to the two lifting jacks, may be controlled by means of a single control valve in such a manner that either the one or the other side of the car is lifted or lowered as required.
- Fig. 1 is an end elevation of the improved lifting jack, some parts being shown in section,
- Fig. 2 is a front elevation, some parts heing shown in section,
- Fig. 3 is a top view of the jack
- Fig. 4 is a front view of the control valve
- Fig. 5 is a sectional elevation of the control valve
- Fig. 6 is a top view of the valve, partly section.
- the liftingframe of the chassis preferably to the under slde of a longitudinal beam of the chassis v in the transverse centre of gravity plane of the car. It will be understood that the two acks are used one on each side of the car.
- a cylinder head 3 to which are pivoted the upper links 2 of the double lazy-tongs mechanism.
- Within the cylinder 3 is adapted to slide a telescopic piston 4, 5.
- the lower end of the piston 5 is fixed within a tubular casing 6 which is pivoted at 7 to the middle links of the double lazy-tongs mechanism.
- the corner pivots of the double lazy-tongs mechanism are provided with springs 8 which tend to keep the mechanism in its closed position.
- the support or foot Q'of the jack is U-shaped in order to receive in the closedposition of the mechanism the casing 6 and the cylinder 3.
- the head of the cylinder 3 is provided with a socket or union 10 to which the pressureliquid supply conduit may be attached,
- the supply of the pressure liquid, preferably oil, supplied by a pump, to the one or other of the twohydraulie cylinders, is controlled by a control valve shown in Figs. i and 5.
- This control valve is provided with an inlet socket 11 and a return socket 12 which are connected to the supply pressure pump (not shown).
- 13 and 14 are sockets for connection of pipes leading to the two hydraulic cylinders of the lifting jacks.
- a double-cone valve 15 controls ports 16 andl7 communicating respectively with the sockets 13 and 14.
- a further valve 18 serves for controlling, that is, opening or closing the port which communicates with the return socket 12.
- the valve should preferably be arranged near the drivers seat.
- a hydraulic jack for lifting motor cars comprising in combination: a double lazytongs mechanism, a hydraulic cylinder and piston interposed between thetop and the middle joint of the said double lazy-tongs mechanism, a tubular casing fixed to the middle joint of the lazy-tongs mechanism and adapted to receive the hydraulic piston and cylinder in the collapsed condition of the jack, and a U-shaped support adapted to receive the said: casing in the collapsed condition of the 3:10
- a hydraulic jack for lifting motor cars comprising in combination a double lazytongs mechanism, a head hinged to the top joint of the lazy-tongs mechanism, and adapted to be fixed to a frame portion of the car; a hydraulic cylinder fixed to the top joint of the lazy-tongs mechanism; a telescopic piston adapted to slide in said cylinder, a tubular casin fixed at its lower end to the lower end of 51c telescopic piston and fixed to the middle joint of the lazy-tongs mechanism, said tubular casing being adapt ed to receivethe telescopic piston and the hydraulic cylinder in the collapsed condition of the jack; a support carrying the lower joint of the lazy-tongs mechanism so shaped as to receive in the collapsed condition of the jack the said tubular casing; and springs acting upon the lateral joints of the lazytongs mechanism for collapsing the jack.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Actuator (AREA)
Description
May 24, 1932.
V R. KUMMEL HYDRAULIC LIFTING JACK 2 Sheets-Sheet 1 Filed Dec. 30, 1929 May 24, 1932.
HYDRAuLIcfLIFTme .mcx
Filed Dec. 30, 1929 KUMMEL' 4 1,859,830
2 Sheets-Sheel; 2
Patented May 24, 1932 I UNITED STATES [PATENT OFFICE r EUGEN am, or
mmumc mrrme .mcx
Application filed December 30, 1929, Serial 1V0. 417,541, and in Switzefland December 24, 1928.
The object of the invention is to provide an improved hydraulic lifting jack, comprising a double lazy-tongs mechanism which is operated by means of a hydraulic cylinder. In the preferred construction the hydraulic cylinder is interposed between the members of the upper lazy tongs mechanism, the head of the jack carr in one part of the hydraulic cylinder, pre era bly the cylinder proper, and the middle pivot of the double tongs mechanism carrying the piston of the hydraulic cylinder. In practice, one hydraulic lifting jack is fixed to the under side of each of the two longitudinal main beams of the chassis of the motor car or other vehicle, preferably in the transverse middle plane of gravity of the car. The two jacks may be operated by means of a single pump which may be driven either from the motor of the motor car by means of a suitable clutch, or may also be a hand operated pump. The passage of the liquid, preferably oil, supplied by the common pump to the two lifting jacks, may be controlled by means of a single control valve in such a manner that either the one or the other side of the car is lifted or lowered as required.
The drawings show by way of example one construction embodying the features of the invention. i
Fig. 1 is an end elevation of the improved lifting jack, some parts being shown in section,
Fig. 2 is a front elevation, some parts heing shown in section,
Fig. 3 is a top view of the jack,
Fig. 4 is a front view of the control valve,
Fig. 5 is a sectional elevation of the control valve, and
Fig. 6 is a top view of the valve, partly section.
Referring first to Figs. 1 to 3, the liftingframe of the chassis, preferably to the under slde of a longitudinal beam of the chassis v in the transverse centre of gravity plane of the car. It will be understood that the two acks are used one on each side of the car. To the head 1 is hinged a cylinder head 3 to which are pivoted the upper links 2 of the double lazy-tongs mechanism. Within the cylinder 3 is adapted to slide a telescopic piston 4, 5. The lower end of the piston 5 is fixed within a tubular casing 6 which is pivoted at 7 to the middle links of the double lazy-tongs mechanism. The corner pivots of the double lazy-tongs mechanism are provided with springs 8 which tend to keep the mechanism in its closed position. The support or foot Q'of the jack is U-shaped in order to receive in the closedposition of the mechanism the casing 6 and the cylinder 3. The head of the cylinder 3 is provided with a socket or union 10 to which the pressureliquid supply conduit may be attached,
The supply of the pressure liquid, preferably oil, supplied by a pump, to the one or other of the twohydraulie cylinders, is controlled by a control valve shown in Figs. i and 5. This control valve is provided with an inlet socket 11 and a return socket 12 which are connected to the supply pressure pump (not shown). 13 and 14 are sockets for connection of pipes leading to the two hydraulic cylinders of the lifting jacks. A double-cone valve 15 controls ports 16 andl7 communicating respectively with the sockets 13 and 14. A further valve 18 serves for controlling, that is, opening or closing the port which communicates with the return socket 12. The valve should preferably be arranged near the drivers seat. It will be, understood that by operating the valve 15 oil may be admitted either to the one or to the other lifting jack whilst by operating the valve 18, oil may be caused to return to the supply valve whereupon the lazy-tongs mechanism will be collapsed by the springs 8. By the employment of a hydraulic cylinder for operating a lazy-tongs mechanism very considerable power may be produced and even very high ears may be lifted easily. In their collapsed condit-ion, the lifting 'jacks take up very little space and they may therefore be permanently fixed to the car.
' As the hydraulic cylinder is, in the collapsed condition of the jack, entirely enclosed within the tubular casing 6, access of dust and foreign matter into the cylinder and piston is entirely. avoided. In the open position of the lazy-tongs mechanism, the piston forms an effective guide for the links.
I claim:
1. A hydraulic jack for lifting motor cars, comprising in combination: a double lazytongs mechanism, a hydraulic cylinder and piston interposed between thetop and the middle joint of the said double lazy-tongs mechanism, a tubular casing fixed to the middle joint of the lazy-tongs mechanism and adapted to receive the hydraulic piston and cylinder in the collapsed condition of the jack, and a U-shaped support adapted to receive the said: casing in the collapsed condition of the 3:10
2. A hydraulic jack for lifting motor cars comprising in combination a double lazytongs mechanism, a head hinged to the top joint of the lazy-tongs mechanism, and adapted to be fixed to a frame portion of the car; a hydraulic cylinder fixed to the top joint of the lazy-tongs mechanism; a telescopic piston adapted to slide in said cylinder, a tubular casin fixed at its lower end to the lower end of 51c telescopic piston and fixed to the middle joint of the lazy-tongs mechanism, said tubular casing being adapt ed to receivethe telescopic piston and the hydraulic cylinder in the collapsed condition of the jack; a support carrying the lower joint of the lazy-tongs mechanism so shaped as to receive in the collapsed condition of the jack the said tubular casing; and springs acting upon the lateral joints of the lazytongs mechanism for collapsing the jack.
Signed atZurich, Switzerland, this 16th day of December, 1929.
REINHOLD K'UMMEL.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1859830X | 1928-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1859830A true US1859830A (en) | 1932-05-24 |
Family
ID=4566555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US417541A Expired - Lifetime US1859830A (en) | 1928-12-24 | 1929-12-30 | Hydraulic lifting jack |
Country Status (1)
Country | Link |
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US (1) | US1859830A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2503347A (en) * | 1945-09-12 | 1950-04-11 | Miller Products | Hydraulic jack |
US2625443A (en) * | 1949-09-27 | 1953-01-13 | Sensenbaugh Andrew | Elevating scaffold |
US2639051A (en) * | 1948-04-16 | 1953-05-19 | Julian B Thomas | Pallet stack unloader |
US2747692A (en) * | 1952-09-29 | 1956-05-29 | Tracy S Holmes | Foot actuated, ground engaging brake for hand trucks and the like |
US2972392A (en) * | 1957-02-08 | 1961-02-21 | Lockheed Aircraft Corp | Aircraft maintenance platform |
US3003746A (en) * | 1957-01-23 | 1961-10-10 | William W Gridley | Load lifting apparatus |
US3701226A (en) * | 1971-01-20 | 1972-10-31 | Cooper Ind Inc | Adjustable positionable structural device |
US3795289A (en) * | 1971-01-08 | 1974-03-05 | C Laforest | Lifting device |
US4194723A (en) * | 1978-04-14 | 1980-03-25 | Jlg Industries, Inc. | Scissors linkage workman's platform |
FR2644766A1 (en) * | 1989-03-24 | 1990-09-28 | Fabrication Accessoires Automo | Double scissor jack, particularly for raising a motor vehicle |
US6792840B2 (en) * | 2002-02-08 | 2004-09-21 | Atlas Die Llc | Folding plunger assembly for blanking system |
US20160039646A1 (en) * | 2014-08-07 | 2016-02-11 | Ryan W. Knapp | Low Profile Drop Table |
US9961989B2 (en) | 2016-03-07 | 2018-05-08 | Marc Stefan Witt | Radial scissor lift table and method |
-
1929
- 1929-12-30 US US417541A patent/US1859830A/en not_active Expired - Lifetime
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2503347A (en) * | 1945-09-12 | 1950-04-11 | Miller Products | Hydraulic jack |
US2639051A (en) * | 1948-04-16 | 1953-05-19 | Julian B Thomas | Pallet stack unloader |
US2625443A (en) * | 1949-09-27 | 1953-01-13 | Sensenbaugh Andrew | Elevating scaffold |
US2747692A (en) * | 1952-09-29 | 1956-05-29 | Tracy S Holmes | Foot actuated, ground engaging brake for hand trucks and the like |
US3003746A (en) * | 1957-01-23 | 1961-10-10 | William W Gridley | Load lifting apparatus |
US2972392A (en) * | 1957-02-08 | 1961-02-21 | Lockheed Aircraft Corp | Aircraft maintenance platform |
US3795289A (en) * | 1971-01-08 | 1974-03-05 | C Laforest | Lifting device |
US3701226A (en) * | 1971-01-20 | 1972-10-31 | Cooper Ind Inc | Adjustable positionable structural device |
US4194723A (en) * | 1978-04-14 | 1980-03-25 | Jlg Industries, Inc. | Scissors linkage workman's platform |
FR2644766A1 (en) * | 1989-03-24 | 1990-09-28 | Fabrication Accessoires Automo | Double scissor jack, particularly for raising a motor vehicle |
US6792840B2 (en) * | 2002-02-08 | 2004-09-21 | Atlas Die Llc | Folding plunger assembly for blanking system |
US20160039646A1 (en) * | 2014-08-07 | 2016-02-11 | Ryan W. Knapp | Low Profile Drop Table |
US10730727B2 (en) * | 2014-08-07 | 2020-08-04 | Bbm Railway Equipment, Llc | Low profile drop table |
US9961989B2 (en) | 2016-03-07 | 2018-05-08 | Marc Stefan Witt | Radial scissor lift table and method |
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