GB951528A - Improvements in fluid pressure control valves - Google Patents
Improvements in fluid pressure control valvesInfo
- Publication number
- GB951528A GB951528A GB29755/62A GB2975562A GB951528A GB 951528 A GB951528 A GB 951528A GB 29755/62 A GB29755/62 A GB 29755/62A GB 2975562 A GB2975562 A GB 2975562A GB 951528 A GB951528 A GB 951528A
- Authority
- GB
- United Kingdom
- Prior art keywords
- passage
- valve
- spring
- open
- pressure
- 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 title abstract 5
- 244000145845 chattering Species 0.000 abstract 1
- 230000000994 depressogenic effect Effects 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 239000011800 void material Substances 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
- 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
-
- 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
-
- 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
-
- 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
- Y10T137/87233—Biased exhaust valve
- Y10T137/87241—Biased closed
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
951,528. Valves. HYDRAULIC UNIT SPECIALTIES CO. Aug. 2, 1962 [May 2, 1962], No. 29755/62. Heading F2V. [Also in Division G3] A fluid pressure control valve has a body 5, Fig. 1, with a valve element 12, Figs. 1 and 3, movable therein to each of a pair of positions to communicate in the body either of a pair of service passages 13, 14 with a fluid supply passage 18, 23, 24 and to communicate the other service passage with a return passage 29, 22, a void control passage 34 for directly connecting the return and supply passages and a check valve 37 to open the passage 34 when the return passage pressure exceeds that of the supply passage. In the preferred embodiment, two elements 12 are slidably mounted in body sections 8, 9 assembled in stacked relationship with further sections 6, 7 so that fluid can flow from passage 18 to a passage 20 by way of an open centre passage 21 extending through all of the sections when the elements 12 are in their neutral positions. When one of the spools is moved to an operating position, it blocks the passage 21 and directs fluid from a feeder passage 23 to one of the service passages 13, 14, the other service passage being simultaneously connected through a branched passage 30 with the return passage 29. A valve 47 has a forwardly facing surface 96 which causes it to open against a spring when the pressure in the passage 20 is greater than that in the passage 20 and an adjustably spring- loaded pilot valve 97 that is depressed by a plunger 101 to open a vent 100 when the pressure in passage 29 exceeds a predetermined value. The opening of the vent 100 permits the valve 47 to open and partial obstruction of the intersection of bores 94, 99 by the plunger prevents chattering. A restricted orifice may be used in place of the valve 47. The check valve 37 may be gravity or spring-loaded and in a modification consists of a hollow spring-loaded single beat lift valve providing a seat for a separately spring-loaded single beat lift to replacing a pressure relief valve 36 in the embodiment shown. Specification 950,131 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US191868A US3194265A (en) | 1962-05-02 | 1962-05-02 | Hydraulic control valve with void control means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB951528A true GB951528A (en) | 1964-03-04 |
Family
ID=22707226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29755/62A Expired GB951528A (en) | 1962-05-02 | 1962-08-02 | Improvements in fluid pressure control valves |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3194265A (en) |
| GB (1) | GB951528A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3299902A (en) * | 1963-10-11 | 1967-01-24 | Commercial Shearing | Fluid control valves |
| US3299903A (en) * | 1964-03-26 | 1967-01-24 | Parker Hannifin Corp | Fluid system and valve assembly therefor |
| US3282286A (en) * | 1964-07-17 | 1966-11-01 | New York Air Brake Co | Distributing valve |
| GB1120203A (en) * | 1965-03-03 | 1968-07-17 | Dowty Hydraulic Units Ltd | Fluid-control slide valves |
| US3390700A (en) * | 1965-04-26 | 1968-07-02 | Commercial Shearing | Control valves |
| US3402736A (en) * | 1966-08-18 | 1968-09-24 | Webster Electric Co Inc | Fluid control valves |
| US3465788A (en) * | 1967-09-01 | 1969-09-09 | Koehring Co | Hydraulic control valve with void prevention means |
| DE2152830C3 (en) * | 1971-10-22 | 1974-04-25 | Heilmeier & Weinlein, Fabrik Fuer Oel-Hydraulik, 8000 Muenchen | Control valve in longitudinal slide design for hydraulic motors |
| US4430927A (en) * | 1980-06-19 | 1984-02-14 | Rubery Owen (Hydraulics) Limited | Hydraulic valves |
| JPH0645109Y2 (en) * | 1988-11-30 | 1994-11-16 | 株式会社小松製作所 | Abnormal pressure prevention and vacuum prevention valve |
| JP3491770B2 (en) * | 1994-03-15 | 2004-01-26 | 株式会社小松製作所 | Directional control valve |
| DE10325296A1 (en) * | 2003-06-04 | 2004-12-23 | Bosch Rexroth Ag | Hydraulic control arrangement |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB725288A (en) * | 1953-01-16 | 1955-03-02 | Int Harvester Great Britain | Improvements in or relating to hydraulic control valves |
| US2924240A (en) * | 1954-08-26 | 1960-02-09 | Sundstrand Corp | Multiple unit valve |
| US2873762A (en) * | 1955-06-27 | 1959-02-17 | Hydraulic Unit Specialities Co | Control valve for fluid pressure operated mechanisms |
| BE549561A (en) * | 1955-10-13 | 1900-01-01 | ||
| US2949097A (en) * | 1957-12-11 | 1960-08-16 | New York Air Brake Co | Five position control valve having power float position |
| US2954051A (en) * | 1958-10-27 | 1960-09-27 | Cessna Aircraft Co | Control valve for multiple valve banks |
| US2954052A (en) * | 1959-02-19 | 1960-09-27 | Cessna Aircraft Co | Pressure fluid control system and valve |
-
1962
- 1962-05-02 US US191868A patent/US3194265A/en not_active Expired - Lifetime
- 1962-08-02 GB GB29755/62A patent/GB951528A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3194265A (en) | 1965-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3304953A (en) | Fluid power system and valve mechanisms therefor | |
| US4401009A (en) | Closed center programmed valve system with load sense | |
| US4145958A (en) | Fluid control system with automatically actuated motor port lock-out valves | |
| US3191626A (en) | Valve | |
| GB951528A (en) | Improvements in fluid pressure control valves | |
| GB1182641A (en) | Pilot Operated Control Valve Mechanism | |
| US4088151A (en) | Cylinder locking apparatus | |
| US3662783A (en) | Spool valve assembly | |
| CA1198963A (en) | Valves | |
| US3064426A (en) | Hydraulic systems | |
| GB1599196A (en) | Control apparatus for an hydraulic working implement | |
| US3596566A (en) | Hydraulic valve | |
| US3212523A (en) | Fluid system and relief valve assembly therefor | |
| US4007666A (en) | Servoactuator | |
| GB1096285A (en) | Improved control valve for fluid-actuated mechanism | |
| GB1021544A (en) | Improved variable pitch propeller control system | |
| US3502109A (en) | Quick response pilot operated valve | |
| US3227179A (en) | Cartridge valves | |
| GB742596A (en) | Improvements in and relating to fluid control valve devices | |
| US3319653A (en) | Flow control valves | |
| US3331447A (en) | Control system for raising and lowering tractor implements | |
| GB905608A (en) | Pressure fluid control system | |
| GB959622A (en) | Hydraulic system | |
| US4276811A (en) | Closed center programmed valve system with load sense | |
| US3283779A (en) | Cartridge valves |