GB1231935A - - Google Patents
Info
- Publication number
- GB1231935A GB1231935A GB1231935DA GB1231935A GB 1231935 A GB1231935 A GB 1231935A GB 1231935D A GB1231935D A GB 1231935DA GB 1231935 A GB1231935 A GB 1231935A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spool
- ram
- valve
- energized
- flow
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/86582—Pilot-actuated
- Y10T137/86614—Electric
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Servomotors (AREA)
- Fluid-Driven Valves (AREA)
Abstract
1,231,935. 935. Hydraulic motor control circuits. ROBERT BOSCH G.m.b.H. April 23, 1969 [April 24, 1968], No.20722/69. Heading F1P. [Also in Division F2] The spool 19 of a reversing valve is urged to a neutral position by a double acting spring device 34, and is moved to provide the deserved flow and return connections to ram 17 by selectively connecting the ends of cylinder 27 to pressure fluid inlet 13 via orifice 43 and electromagnetically actuated pilot valves 45, 47. With both pilot valves open spool 19 is hydraulically free but is centralized by device 34 so locking ram 17. Energizing valve 45 closes the path between chamber 39 and outlet 14 so that pressure is applied to both chambers 37, 39 causing differential piston 36 to move spool 19 to the left. If now valve 47 is energized, a spool 19 is locked hydraulically and flow to ram 17 continues until valves 45, 47 are de-energized whereupon spool 19 is returned to its neutral position by device 34 and ram 17 is locked in its new position. To reverse the action of ram 17 valve 47 is energized so that fluid can only flow to chamber 37 thereby moving the spool to the right. According to a modification (not shown) the pilot valves are of single bent type. .
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1750358A DE1750358B2 (en) | 1968-04-24 | 1968-04-24 | Electro-hydraulic control device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1231935A true GB1231935A (en) | 1971-05-12 |
Family
ID=5691778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1231935D Expired GB1231935A (en) | 1968-04-24 | 1969-04-23 |
Country Status (4)
Country | Link |
---|---|
US (1) | US3556154A (en) |
DE (1) | DE1750358B2 (en) |
FR (1) | FR1597888A (en) |
GB (1) | GB1231935A (en) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3987702A (en) * | 1970-08-21 | 1976-10-26 | Messerschmitt-Bolkow-Blohm Gmbh | Method and device for electrohydraulic control of a hydraulic actuator |
DE2112813C3 (en) * | 1971-03-17 | 1981-04-30 | Robert Bosch Gmbh, 7000 Stuttgart | Electro-hydraulic control device |
JPS5630883Y2 (en) * | 1973-05-09 | 1981-07-23 | ||
DE2517205A1 (en) * | 1975-04-18 | 1976-10-28 | Danfoss As | HYDRAULIC CONTROL DEVICE |
DE2533829C2 (en) * | 1975-07-29 | 1985-01-10 | Robert Bosch Gmbh, 7000 Stuttgart | Electro-hydraulic control device |
JPS6048641B2 (en) * | 1976-06-11 | 1985-10-29 | 株式会社日立製作所 | fluid pressure servo valve |
US4220074A (en) * | 1977-05-25 | 1980-09-02 | Vapor Corporation | Switching valve |
US4303003A (en) * | 1977-05-25 | 1981-12-01 | Vapor Corporation | Switching valve |
DE2928005A1 (en) * | 1978-07-18 | 1980-02-14 | Diesel Kiki Co | REMOTE CONTROLLED PROPORTIONAL CONTROL DIRECTION SWITCHING CONTROL VALVE DEVICE |
US4199942A (en) * | 1978-09-28 | 1980-04-29 | Eaton Corporation | Load sensing control for hydraulic system |
IT1119444B (en) * | 1979-10-30 | 1986-03-10 | Fiat Ricerche | HYDRAULIC DISTRIBUTOR |
US4638720A (en) * | 1980-12-01 | 1987-01-27 | Deere & Company | Electro-hydraulic control system |
EP0054619A1 (en) * | 1980-12-22 | 1982-06-30 | GebràDer Sulzer Aktiengesellschaft | Actuator with differential piston |
US4804009A (en) * | 1982-06-08 | 1989-02-14 | Johnson Service Company | Pneumatic interface apparatus for control of process systems |
DE3246738C2 (en) * | 1982-09-28 | 1987-02-05 | Dr. H. Tiefenbach Gmbh & Co, 4300 Essen | Self-medium controlled hydraulic valve with adjustable flow cross-section |
US4566530A (en) * | 1983-05-11 | 1986-01-28 | United Aircraft Products, Inc. | Pressure operated shuttle valve |
US4770200A (en) * | 1985-10-28 | 1988-09-13 | Johnson Service Company | Pneumatic interface apparatus |
US5046397A (en) * | 1987-04-29 | 1991-09-10 | Vickers, Incorporated | Electrohydraulic and hydromechanical valve system for dual-piston stroke controller |
US4934143A (en) * | 1987-04-29 | 1990-06-19 | Vickers, Incorporated | Electrohydraulic fluid control system for variable displacement pump |
DE3817122A1 (en) * | 1988-05-19 | 1989-11-30 | Herion Werke Kg | SAFETY VALVE |
US5459405A (en) * | 1991-05-22 | 1995-10-17 | Wolff Controls Corp. | Method and apparatus for sensing proximity of an object using near-field effects |
US7775240B2 (en) * | 2006-02-07 | 2010-08-17 | Sturman Digital Systems, Llc | Spool valve |
US10202987B2 (en) * | 2013-07-19 | 2019-02-12 | Dresser, Llc | Valve assembly having dual functionality for directional control of a piston on a fluid actuated device |
US9546737B1 (en) * | 2015-09-09 | 2017-01-17 | James Wang | Solenoid valve |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2993510A (en) * | 1956-11-28 | 1961-07-25 | Int Basic Economy Corp | Fluid control valve |
US2898936A (en) * | 1957-04-17 | 1959-08-11 | Int Basic Economy Corp | Pilot actuated fluid control valve |
US2916051A (en) * | 1958-03-12 | 1959-12-08 | Elizabeth H Taylor | Fluid pressure operated valve |
US3129645A (en) * | 1962-05-02 | 1964-04-21 | Double A Prod Co | Electrically modulated fluid valve |
US3434390A (en) * | 1966-04-25 | 1969-03-25 | Bosch Arma Corp | Valve control apparatus |
-
1968
- 1968-04-24 DE DE1750358A patent/DE1750358B2/en active Granted
- 1968-12-17 FR FR1597888D patent/FR1597888A/fr not_active Expired
-
1969
- 1969-01-30 US US3556154D patent/US3556154A/en not_active Expired - Lifetime
- 1969-04-23 GB GB1231935D patent/GB1231935A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3556154A (en) | 1971-01-19 |
DE1750358B2 (en) | 1974-09-19 |
FR1597888A (en) | 1970-06-29 |
DE1750358C3 (en) | 1975-04-30 |
DE1750358A1 (en) | 1971-02-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |