GB626806A - Improvements in or relating to pressure operated jack systems - Google Patents
Improvements in or relating to pressure operated jack systemsInfo
- Publication number
- GB626806A GB626806A GB1995047A GB1995047A GB626806A GB 626806 A GB626806 A GB 626806A GB 1995047 A GB1995047 A GB 1995047A GB 1995047 A GB1995047 A GB 1995047A GB 626806 A GB626806 A GB 626806A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- fluid
- cylinder
- relating
- pressure operated
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
626,806. Hydraulic jacks. ELECTROHYDRAULICS, Ltd., and HACKNEY, S. July 24, 1947, No. 19950. [Class 69 (ii)] A cylinder 1 encloses a main, floating piston 6 mounted on a hollow piston-rod 3 formed with a secondary piston 5, fluid acting on both pistons for extension and on the annular area of the piston 5 for retraction. Fluid is admitted to the cylinder through a connection 7 via ports 9, and forces the piston 5 outwards until it abuts a gland thereafter acting on the secondary piston. For retraction, fluid is admitted at 11. In a modification, the secondary piston comprises a washer on the end of the rod 3, and extension of the jack is obtained by admitting fluid through a port at the inner end of the cylinder. A locking-device may be incorporated as described in Specification 527,225.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1995047A GB626806A (en) | 1947-07-24 | 1947-07-24 | Improvements in or relating to pressure operated jack systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1995047A GB626806A (en) | 1947-07-24 | 1947-07-24 | Improvements in or relating to pressure operated jack systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB626806A true GB626806A (en) | 1949-07-21 |
Family
ID=10137832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1995047A Expired GB626806A (en) | 1947-07-24 | 1947-07-24 | Improvements in or relating to pressure operated jack systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB626806A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0495210A1 (en) * | 1990-12-21 | 1992-07-22 | Deere & Company | Hydraulic lift with weight transfer |
US5203250A (en) * | 1990-12-21 | 1993-04-20 | Deere & Company | Fluid cylinder mechanism |
CN105443490A (en) * | 2015-01-23 | 2016-03-30 | 徐州重型机械有限公司 | Hydraulic cylinder |
-
1947
- 1947-07-24 GB GB1995047A patent/GB626806A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0495210A1 (en) * | 1990-12-21 | 1992-07-22 | Deere & Company | Hydraulic lift with weight transfer |
US5203250A (en) * | 1990-12-21 | 1993-04-20 | Deere & Company | Fluid cylinder mechanism |
CN105443490A (en) * | 2015-01-23 | 2016-03-30 | 徐州重型机械有限公司 | Hydraulic cylinder |
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