GB824634A - Improvements in or relating to hydraulic jacks - Google Patents
Improvements in or relating to hydraulic jacksInfo
- Publication number
- GB824634A GB824634A GB21542/58A GB2154258A GB824634A GB 824634 A GB824634 A GB 824634A GB 21542/58 A GB21542/58 A GB 21542/58A GB 2154258 A GB2154258 A GB 2154258A GB 824634 A GB824634 A GB 824634A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- jack
- pump
- pressure
- chamber
- 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
- 239000007788 liquid Substances 0.000 abstract 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/58—Devices for setting props or chocks
- E21D15/585—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
- E21D15/586—Devices for setting props or chocks by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important the props being pre-loaded
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/31552—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line
- F15B2211/31558—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line having a single output member
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/321—Directional control characterised by the type of actuation mechanically
- F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting output members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Reciprocating Pumps (AREA)
Abstract
824,634. Hydraulic jacks. SOC. INDUSTRIELLE POUR LA FABRICATION DES CINTREUSES MINGORIS.I.C. July 4, 1958 [July 18, 1957], No. 21542/58. Class 69 (2). [Also in Group XXX] An hydraulic jack 15 is actuated by liquid supplied by a hand pump 5 having a differential piston operating in chambers 8, 9 connected by passages 10, 11 to chambers 18, 17 of the jack. Passages 10, 11 are connected by by-passes 24, 25 to a valve chamber 14 leading to a reservoir 1. A valve member 13 is positionable to block either by-pass and to open the other to exhaust so that operation of the pump actuates the jack piston in either direction. At the end of a working (extension) stroke the jack piston uncovers a safety valve 29 to limit the pressure in line 11, a collar 27 on the piston forming a definite stop. During a return stroke the pressure of liquid is limited by the safety valve 29, and hence the pressure in chamber 8 is always limited to this value. Since this is the only pump chamber from which liquid can leak to the exterior, sealing of the pump piston can be readily effected.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR824634X | 1957-07-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB824634A true GB824634A (en) | 1959-12-02 |
Family
ID=9281908
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB21542/58A Expired GB824634A (en) | 1957-07-18 | 1958-07-04 | Improvements in or relating to hydraulic jacks |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB824634A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103288005A (en) * | 2013-05-02 | 2013-09-11 | 韶关学院 | Manual rapid portable extra-high-pressure hydraulic jack |
CN105110231A (en) * | 2015-09-17 | 2015-12-02 | 京东方科技集团股份有限公司 | Hydraulic lifting jack |
-
1958
- 1958-07-04 GB GB21542/58A patent/GB824634A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103288005A (en) * | 2013-05-02 | 2013-09-11 | 韶关学院 | Manual rapid portable extra-high-pressure hydraulic jack |
CN105110231A (en) * | 2015-09-17 | 2015-12-02 | 京东方科技集团股份有限公司 | Hydraulic lifting jack |
CN105110231B (en) * | 2015-09-17 | 2017-08-29 | 京东方科技集团股份有限公司 | A kind of hydraulic jack |
US9926177B2 (en) | 2015-09-17 | 2018-03-27 | Boe Technology Group Co., Ltd. | Hydraulic jack |
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