GB1078834A - Improvements in ram cylinders - Google Patents
Improvements in ram cylindersInfo
- Publication number
- GB1078834A GB1078834A GB3195365A GB3195365A GB1078834A GB 1078834 A GB1078834 A GB 1078834A GB 3195365 A GB3195365 A GB 3195365A GB 3195365 A GB3195365 A GB 3195365A GB 1078834 A GB1078834 A GB 1078834A
- Authority
- GB
- United Kingdom
- Prior art keywords
- seal
- pressure
- chamber
- piston
- face
- 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
- 239000012530 fluid Substances 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/08—Shifting conveyors or other transport devices from one location at the working face to another
- E21F13/086—Armoured conveyors shifting devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
-
- 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
- F15B15/17—Characterised by the construction of the motor unit of the straight-cylinder type of differential-piston type
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Sealing Devices (AREA)
- Fluid-Damping Devices (AREA)
- Actuator (AREA)
Abstract
1,078,834. Fluid pressure jacks. KLOCKNER-WERKE A.G. July 27, 1965 [July 28, 1964], No. 31953/65. Heading B8J. [Also in Division F1] A double acting ram unit comprises a pressurizable expanding seal 8 mounted in the body of a piston with an annular face 2a and a full face 2b. A piston rod 3 includes a pressure supply duct 1 communicating with the interior of the seal 8 and a by-pass duct 9 with a non- return valve 10 communicating with the interior of the seal 8 and with the chamber on the side of the annular face 2a. When pressure is applied to the annular face 2a through a pipe (not shown) the valve 10 is closed and isolates the interior of the seal 8 so that pressure can be transmitted through the clearance between the seal 8 and the inside of the cylinder, the pressures in the chambers on both sides of the piston becoming the same with consequent extension of the ram. Admission of pressure through the duct 1 seals the seal 8 against the inside of the cylinder insolating the chamber of the full face 2b from the chamber of the annular face 2a so that the ram is retracted, pressure medium trapped in the full face piston chamber escaping through an exhaust (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK53583A DE1288545B (en) | 1964-07-28 | 1964-07-28 | Back cylinder with a piston that can be acted upon by a working medium on both sides |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1078834A true GB1078834A (en) | 1967-08-09 |
Family
ID=7226775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3195365A Expired GB1078834A (en) | 1964-07-28 | 1965-07-27 | Improvements in ram cylinders |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE667424A (en) |
DE (1) | DE1288545B (en) |
GB (1) | GB1078834A (en) |
NL (1) | NL6509389A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113217502A (en) * | 2021-06-01 | 2021-08-06 | 中国矿业大学(北京) | Piston rod pressure maintaining pushing device of pseudo-triaxial pressure maintaining loading device |
CN113680425A (en) * | 2021-09-14 | 2021-11-23 | 洛阳大华智能科技有限公司 | Hydraulic locking type cone crusher and locking method |
CN114215821A (en) * | 2021-12-30 | 2022-03-22 | 徐州徐工液压件有限公司 | Hydraulic cylinder with built-in oil circuit supporting legs |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE918204C (en) * | 1952-04-30 | 1954-09-20 | Fritz Bothe | Back device, especially for laying face conveyors |
DE1864707U (en) * | 1962-01-26 | 1963-01-03 | Glueck Auf Guenther Klerner Ma | CHANGEABLE, DOUBLE-ACTING, HYDRAULIC ADVANCING CYLINDER UNIT, IN PARTICULAR FOR EQUIPMENT CONVEYORS IN MINING. |
-
1964
- 1964-07-28 DE DEK53583A patent/DE1288545B/en active Pending
-
1965
- 1965-07-20 NL NL6509389A patent/NL6509389A/xx unknown
- 1965-07-26 BE BE667424D patent/BE667424A/xx unknown
- 1965-07-27 GB GB3195365A patent/GB1078834A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113217502A (en) * | 2021-06-01 | 2021-08-06 | 中国矿业大学(北京) | Piston rod pressure maintaining pushing device of pseudo-triaxial pressure maintaining loading device |
CN113217502B (en) * | 2021-06-01 | 2022-03-22 | 中国矿业大学(北京) | Piston rod pressure maintaining pushing device of pseudo-triaxial pressure maintaining loading device |
CN113680425A (en) * | 2021-09-14 | 2021-11-23 | 洛阳大华智能科技有限公司 | Hydraulic locking type cone crusher and locking method |
CN113680425B (en) * | 2021-09-14 | 2023-01-20 | 洛阳大华智能科技有限公司 | Hydraulic locking type cone crusher and locking method |
CN114215821A (en) * | 2021-12-30 | 2022-03-22 | 徐州徐工液压件有限公司 | Hydraulic cylinder with built-in oil circuit supporting legs |
Also Published As
Publication number | Publication date |
---|---|
DE1288545B (en) | 1969-02-06 |
NL6509389A (en) | 1966-01-31 |
BE667424A (en) | 1965-11-16 |
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