FI881400A - HYDRAULIC DIFFERENTIAL VALVE FOR FOIL CONTROL AV ELEKTRISK KRETSBRYTARE. - Google Patents
HYDRAULIC DIFFERENTIAL VALVE FOR FOIL CONTROL AV ELEKTRISK KRETSBRYTARE. Download PDFInfo
- Publication number
- FI881400A FI881400A FI881400A FI881400A FI881400A FI 881400 A FI881400 A FI 881400A FI 881400 A FI881400 A FI 881400A FI 881400 A FI881400 A FI 881400A FI 881400 A FI881400 A FI 881400A
- Authority
- FI
- Finland
- Prior art keywords
- cylinder
- kretsbrytare
- elektrisk
- piston
- differential valve
- Prior art date
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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
- H01H33/34—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Control Of Fluid Gearings (AREA)
- Retarders (AREA)
- Reciprocating Pumps (AREA)
- Lift Valve (AREA)
- Fluid-Driven Valves (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Vehicle Body Suspensions (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Percussive Tools And Related Accessories (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
Jack in which the annular chamber 14 of the cylinder 4 is always subjected to the high pressure of an accumulator 18. The piston 6 of the jack is free of any sealing lining in regard to the inner surface 38 of the cylinder and this piston mechanically actuates a valve 42 which sealingly closes off a seat 44 surrounding the feed/purge orifice 28 of the cylinder, at the bottom end of travel of the piston 6. The invention allows the cylinder 4 to be made in the form of a casting whose inner cylindrical surface 38 requires no accurate machining such as grinding or honing. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8704134A FR2613122B1 (en) | 1987-03-25 | 1987-03-25 | DIFFERENTIAL HYDRAULIC CYLINDER FOR THE CONTROL OF ELECTRIC CIRCUIT BREAKERS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FI881400A0 FI881400A0 (en) | 1988-03-24 |
| FI881400A true FI881400A (en) | 1988-09-26 |
Family
ID=9349407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI881400A FI881400A (en) | 1987-03-25 | 1988-03-24 | HYDRAULIC DIFFERENTIAL VALVE FOR FOIL CONTROL AV ELEKTRISK KRETSBRYTARE. |
Country Status (17)
| Country | Link |
|---|---|
| EP (1) | EP0284482B1 (en) |
| JP (1) | JP2593909B2 (en) |
| KR (1) | KR920006522B1 (en) |
| CN (1) | CN1008652B (en) |
| AT (1) | ATE71471T1 (en) |
| AU (1) | AU599217B2 (en) |
| BR (1) | BR8801365A (en) |
| CA (1) | CA1319728C (en) |
| DE (1) | DE3867514D1 (en) |
| ES (1) | ES2028314T3 (en) |
| FI (1) | FI881400A (en) |
| FR (1) | FR2613122B1 (en) |
| HU (1) | HU204328B (en) |
| IN (1) | IN170378B (en) |
| SU (1) | SU1644724A3 (en) |
| YU (1) | YU47464B (en) |
| ZA (1) | ZA881688B (en) |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1070266B (en) * | 1958-06-04 | |||
| FR1312751A (en) * | 1961-01-24 | 1962-12-21 | Coq Nv | Improvements made to electrical switches with pneumatic current break |
| US3155009A (en) * | 1961-08-03 | 1964-11-03 | Gen Dynamics Corp | High energy actuator apparatus |
| FR1378068A (en) * | 1963-07-24 | 1964-11-13 | Merlin Gerin | Improvement in hydraulic control devices, in particular for electrical switches |
| DE1282131B (en) * | 1965-01-29 | 1968-11-07 | Siemens Ag | Electric switch |
| FR2317532A1 (en) * | 1975-07-07 | 1977-02-04 | Gratzmuller Jean Louis | HYDRAULIC CYLINDER WITH BUILT-IN SHOCK ABSORBER WITH DAMPER CHAMBER SUPPLY |
| US4166937A (en) * | 1978-05-18 | 1979-09-04 | General Electric Company | Hydraulically-activated operating system for an electric circuit breaker |
| JPS5598464U (en) * | 1978-12-27 | 1980-07-09 | ||
| JPS5693227A (en) * | 1979-12-27 | 1981-07-28 | Hitachi Ltd | Hydraulic driving unit |
| JPS56153627A (en) * | 1980-04-28 | 1981-11-27 | Meidensha Electric Mfg Co Ltd | Oil pressure operating device |
| JPS59109044U (en) * | 1983-01-12 | 1984-07-23 | 株式会社東芝 | Hydraulic pressure operating device for breaker |
| JPS61161627A (en) * | 1985-01-08 | 1986-07-22 | 三菱電機株式会社 | Hydraulic type operator |
| JPH0795416B2 (en) * | 1986-02-26 | 1995-10-11 | 株式会社東芝 | Hydraulic operating device |
| US4785712A (en) * | 1986-05-27 | 1988-11-22 | Mitsubishi Denki Kabushiki Kaisha | Hydraulic operating apparatus for electric circuit breaker |
-
1987
- 1987-03-25 FR FR8704134A patent/FR2613122B1/en not_active Expired
-
1988
- 1988-03-09 ZA ZA881688A patent/ZA881688B/en unknown
- 1988-03-10 IN IN156/MAS/88A patent/IN170378B/en unknown
- 1988-03-11 DE DE8888400574T patent/DE3867514D1/en not_active Expired - Lifetime
- 1988-03-11 EP EP88400574A patent/EP0284482B1/en not_active Expired - Lifetime
- 1988-03-11 AT AT88400574T patent/ATE71471T1/en not_active IP Right Cessation
- 1988-03-11 ES ES198888400574T patent/ES2028314T3/en not_active Expired - Lifetime
- 1988-03-17 HU HU881316A patent/HU204328B/en not_active IP Right Cessation
- 1988-03-18 YU YU55288A patent/YU47464B/en unknown
- 1988-03-23 CA CA000562240A patent/CA1319728C/en not_active Expired - Lifetime
- 1988-03-23 AU AU13515/88A patent/AU599217B2/en not_active Ceased
- 1988-03-24 FI FI881400A patent/FI881400A/en not_active Application Discontinuation
- 1988-03-24 BR BR888801365A patent/BR8801365A/en not_active IP Right Cessation
- 1988-03-24 KR KR1019880003173A patent/KR920006522B1/en not_active IP Right Cessation
- 1988-03-24 SU SU4355424A patent/SU1644724A3/en active
- 1988-03-25 CN CN88101589A patent/CN1008652B/en not_active Expired
- 1988-03-25 JP JP63073066A patent/JP2593909B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| AU1351588A (en) | 1988-09-29 |
| ES2028314T3 (en) | 1992-07-01 |
| EP0284482B1 (en) | 1992-01-08 |
| JP2593909B2 (en) | 1997-03-26 |
| CA1319728C (en) | 1993-06-29 |
| ZA881688B (en) | 1988-09-06 |
| YU55288A (en) | 1990-04-30 |
| ATE71471T1 (en) | 1992-01-15 |
| FR2613122B1 (en) | 1989-06-23 |
| CN88101589A (en) | 1988-10-12 |
| FR2613122A1 (en) | 1988-09-30 |
| AU599217B2 (en) | 1990-07-12 |
| HUT48331A (en) | 1989-05-29 |
| YU47464B (en) | 1995-10-03 |
| SU1644724A3 (en) | 1991-04-23 |
| KR920006522B1 (en) | 1992-08-07 |
| CN1008652B (en) | 1990-07-04 |
| BR8801365A (en) | 1988-11-01 |
| EP0284482A1 (en) | 1988-09-28 |
| FI881400A0 (en) | 1988-03-24 |
| JPS63254623A (en) | 1988-10-21 |
| HU204328B (en) | 1991-12-30 |
| IN170378B (en) | 1992-03-21 |
| KR880011481A (en) | 1988-10-28 |
| DE3867514D1 (en) | 1992-02-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD | Application lapsed |
Owner name: GRATZMULLER, CLAUDE ALAIN |