GB2001516A - Control valve - Google Patents
Control valveInfo
- Publication number
- GB2001516A GB2001516A GB7830245A GB7830245A GB2001516A GB 2001516 A GB2001516 A GB 2001516A GB 7830245 A GB7830245 A GB 7830245A GB 7830245 A GB7830245 A GB 7830245A GB 2001516 A GB2001516 A GB 2001516A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- passage
- change
- pilot chamber
- cylinder
- 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.)
- Granted
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
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Abstract
A control valve for controlling the operation of a hydraulic cylinder comprises a check valve 5 disposed between a change-over valve 2 and a cylinder A, a passage 34, 35 for introducing the cylinder holding pressure into the pilot chamber 33 of said check valve 5, and a passage connecting and disconnecting means 26 whereby when the change-over valve 2 is in a neutral or elevating position, the cylinder holding pressure is introduced into said pilot chamber 33 through said passage 34, 35, and when the change-over valve 2 is in a descending position, said passage 34, 35 is shut off and said pilot chamber 33 is connected to a tank. Thus, the tendency of hydraulic fluid to lead past the valve 2 in the neutral position is prevented. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8697977A JPS5422070A (en) | 1977-07-19 | 1977-07-19 | Control valve for machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2001516A true GB2001516A (en) | 1979-02-07 |
| GB2001516B GB2001516B (en) | 1982-02-10 |
Family
ID=13901980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7830245A Expired GB2001516B (en) | 1977-07-19 | 1978-07-18 | Control valve |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5422070A (en) |
| CA (1) | CA1120827A (en) |
| DE (1) | DE2831515C2 (en) |
| FR (1) | FR2398202A1 (en) |
| GB (1) | GB2001516B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5648982B2 (en) * | 1973-10-19 | 1981-11-19 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3035610A (en) * | 1959-09-10 | 1962-05-22 | Oliver Corp | Control valve for hydraulic actuator |
| JPS4825199U (en) * | 1971-07-31 | 1973-03-24 | ||
| DE2449599A1 (en) * | 1974-10-18 | 1976-04-29 | Bosch Gmbh Robert | Path valve for single-acting consumer - has relief channel connected to second path valve by spring loaded valve |
| US4088151A (en) * | 1976-05-26 | 1978-05-09 | Borg-Warner Corporation | Cylinder locking apparatus |
-
1977
- 1977-07-19 JP JP8697977A patent/JPS5422070A/en active Granted
-
1978
- 1978-07-17 CA CA000307479A patent/CA1120827A/en not_active Expired
- 1978-07-18 DE DE19782831515 patent/DE2831515C2/en not_active Expired
- 1978-07-18 GB GB7830245A patent/GB2001516B/en not_active Expired
- 1978-07-18 FR FR7821259A patent/FR2398202A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2398202A1 (en) | 1979-02-16 |
| JPS5422070A (en) | 1979-02-19 |
| JPS6257843B2 (en) | 1987-12-03 |
| FR2398202B1 (en) | 1983-12-16 |
| DE2831515A1 (en) | 1979-02-22 |
| DE2831515C2 (en) | 1986-11-06 |
| CA1120827A (en) | 1982-03-30 |
| GB2001516B (en) | 1982-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |