GB1425602A - Directional control valves - Google Patents
Directional control valvesInfo
- Publication number
- GB1425602A GB1425602A GB1663273A GB1663273A GB1425602A GB 1425602 A GB1425602 A GB 1425602A GB 1663273 A GB1663273 A GB 1663273A GB 1663273 A GB1663273 A GB 1663273A GB 1425602 A GB1425602 A GB 1425602A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- piston
- spool
- chamber
- fluid
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
-
- 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
- F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
- F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation 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
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2559—Self-controlled branched flow systems
- Y10T137/2574—Bypass or relief controlled by main line fluid condition
- Y10T137/2605—Pressure responsive
- Y10T137/263—Plural sensors for single bypass or relief valve
-
- 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
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2559—Self-controlled branched flow systems
- Y10T137/2574—Bypass or relief controlled by main line fluid condition
- Y10T137/2605—Pressure responsive
- Y10T137/2635—Pilot valve operated
-
- 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
- Y10T137/87169—Supply and exhaust
- Y10T137/87177—With bypass
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Safety Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
1425602 Valves PARKER-HANNIFIN CORP 6 April 1973 [5 May 1972] 16632/73 Heading F2V A directional control valve for controlling two fluid motors has a pressure compensating piston 42 which, by by-passing any excess fluid, maintains a constant flow rate to the selected motor and in the event that both motors are selected for operation it provides for constant flow in the motor subject to the greater load. Fluid supply, via passage 43, is controlled by two spools 40, 41 the openings 59 in which are uncovered by the required amount to supply respective motors 50, 51 as the spools are displaced to the left or right from the neutral position shown and as fluid pressure operates secondary compensating pistons 60, 60 to uncover the orifices 61 in the spools 40, 41. At the same time check valves 62, 62 are unseated to permit pressure to be fed to the pressure compensating piston 42 via orifices 63 in the spool, passage 52 and restriction 53. Inlet pressure is fed to the chamber 57 at the other end of the pressure compensating piston via orifices 64 and 56 and the piston moves to a position to by-pass any excess flow so to maintain a constant pressure differential between the inlet pressure and that existing in the motor feed passage, i.e. to maintain a constant flow in accordance with the setting of the spool. If both motors are selected for operation the higher of the two pressures within the spool passages 68 will close the other check valve 62 to maintain the pressure in the chamber 54 of the pressure compensating piston at this higher level thus providing by-passing action in accordance with the flow to the more highly loaded motor and allowing the higher pressure to act on the secondary compressing piston 60 to control the flow to the corresponding motor. When both spools are in neutral, pressure in chamber 54 leaks away to exhaust via restrictions 53 and 58 and the piston 42 moves over to the right to provide maximum by-pass action, thus unloading the pump. Should pressure in chamber 54 becomes excessive under operating conditions valve 69 opens to provide an exhaust connection which causes piston 42 to provide an immediate relief action, restriction 53 preventing a build up of pressure in the chamber while valve 69 is open. In another embodiment, Fig. 3 (not shown), the fluid pressure for operating the pressure compensating piston (42<SP>1</SP>) is riot taken via the interconnecting passage 52 of Fig. 2 but via a check valve (78) in each spool giving access to the pressure in the axial bore of the spool upstream of the secondary compensating piston.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00250793A US3827453A (en) | 1972-05-05 | 1972-05-05 | Directional control valve |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1425602A true GB1425602A (en) | 1976-02-18 |
Family
ID=22949169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1663273A Expired GB1425602A (en) | 1972-05-05 | 1973-04-06 | Directional control valves |
Country Status (8)
Country | Link |
---|---|
US (1) | US3827453A (en) |
JP (1) | JPS4954925A (en) |
AU (1) | AU5441773A (en) |
CA (1) | CA980656A (en) |
DE (1) | DE2320679A1 (en) |
FR (1) | FR2183825A1 (en) |
GB (1) | GB1425602A (en) |
IT (1) | IT987094B (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3902401A (en) * | 1968-03-13 | 1975-09-02 | Caterpillar Tractor Co | Hydraulic flow amplifier valve |
US3965921A (en) * | 1972-06-08 | 1976-06-29 | Abex Corporation | Controlled opening pressure compensated flow control valve |
US4062374A (en) * | 1974-05-08 | 1977-12-13 | Sperry Rand Limited | Hydraulic valves and hydraulic systems |
US4129987A (en) * | 1977-10-17 | 1978-12-19 | Gresen Manufacturing Company | Hydraulic control system |
DE3044144A1 (en) * | 1980-11-24 | 1982-09-09 | Linde Ag, 6200 Wiesbaden | HYDROSTATIC DRIVE SYSTEM WITH ONE ADJUSTABLE PUMP AND SEVERAL CONSUMERS |
EP0082617A1 (en) * | 1981-12-07 | 1983-06-29 | Fluid Controls, Inc. | Flow regulating valve |
US5067389A (en) * | 1990-08-30 | 1991-11-26 | Caterpillar Inc. | Load check and pressure compensating valve |
FR2689575B1 (en) * | 1992-04-06 | 1994-07-08 | Rexroth Sigma | HYDRAULIC DISTRIBUTOR WITH PRESSURE COMPENSATION AND A MAXIMUM PRESSURE SELECTION FOR DRIVING A PUMP AND MULTIPLE HYDRAULIC CONTROL INCLUDING SUCH DISTRIBUTORS. |
DE4234037C2 (en) * | 1992-10-09 | 2001-03-22 | Mannesmann Rexroth Ag | Valve arrangement, in particular for mobile work equipment |
DE4446144A1 (en) * | 1994-12-23 | 1996-06-27 | Bosch Gmbh Robert | Hydraulic control in monoblock design from at least two interlinked electromagnetically actuated proportional directional control valve elements |
US5699665A (en) * | 1996-04-10 | 1997-12-23 | Commercial Intertech Corp. | Control system with induced load isolation and relief |
US6431957B1 (en) | 2000-01-25 | 2002-08-13 | Parker-Hannifin Corporation | Directional flow control valve with recirculation for chemical-mechanical polishing slurries |
US8726646B2 (en) * | 2008-03-10 | 2014-05-20 | Parker-Hannifin Corporation | Hydraulic system having multiple actuators and an associated control method |
RU2012135657A (en) * | 2010-01-22 | 2014-02-27 | Кеафьюжин 2200, Инк. | HYDRAULIC DEVICE WITH WELL-VALVE AND METHOD FOR ITS USE |
GB2494902B (en) * | 2011-09-23 | 2019-03-13 | Parker Hannifin Mfg Uk Limited | A valve with integrated pressure compensator |
JP6338428B2 (en) * | 2014-04-11 | 2018-06-06 | Kyb株式会社 | Valve structure |
CN104235107A (en) * | 2014-09-18 | 2014-12-24 | 芜湖高昌液压机电技术有限公司 | Shear-type lifting machine bypass reversing valve unloading loop |
US10323762B2 (en) * | 2016-04-21 | 2019-06-18 | Parker-Hannifin Corporation | Three-way pressure control and flow regulator valve |
CN111734698B (en) * | 2020-07-03 | 2022-04-08 | 中国矿业大学 | Shunt motor speed change synchronization system capable of resisting time-varying large unbalance load and working method |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US26338A (en) * | 1859-12-06 | Improvement in harvesters | ||
US3008488A (en) * | 1959-11-16 | 1961-11-14 | New York Air Brake Co | Control valve |
US3145734A (en) * | 1961-10-06 | 1964-08-25 | Borg Warner | Pressure compensated flow control valve |
US3411416A (en) * | 1965-01-29 | 1968-11-19 | Eton Yale & Towne Inc | Adjustable, metered, directional flow control arrangement |
CH444601A (en) * | 1966-12-13 | 1967-09-30 | Beringer Hydraulik Gmbh | Control device for hydraulically operated equipment |
US3602104A (en) * | 1969-07-08 | 1971-08-31 | Eaton Yale & Towne | Pressure-compensated flow control |
US3631890A (en) * | 1970-04-06 | 1972-01-04 | Borg Warner | Flow extending bypass valve |
US3718159A (en) * | 1971-01-20 | 1973-02-27 | Hydraulic Industries | Control valve |
-
1972
- 1972-05-05 US US00250793A patent/US3827453A/en not_active Expired - Lifetime
-
1973
- 1973-04-06 GB GB1663273A patent/GB1425602A/en not_active Expired
- 1973-04-12 AU AU54417/73A patent/AU5441773A/en not_active Expired
- 1973-04-17 CA CA169,482A patent/CA980656A/en not_active Expired
- 1973-04-24 DE DE2320679A patent/DE2320679A1/en active Pending
- 1973-05-02 IT IT23603/73A patent/IT987094B/en active
- 1973-05-04 JP JP48050171A patent/JPS4954925A/ja active Pending
- 1973-05-04 FR FR7316202A patent/FR2183825A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
AU5441773A (en) | 1974-10-17 |
JPS4954925A (en) | 1974-05-28 |
DE2320679A1 (en) | 1973-11-22 |
CA980656A (en) | 1975-12-30 |
IT987094B (en) | 1975-02-20 |
FR2183825A1 (en) | 1973-12-21 |
US3827453A (en) | 1974-08-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |