JPS57186677A - Counterbalance valve - Google Patents
Counterbalance valveInfo
- Publication number
- JPS57186677A JPS57186677A JP7179981A JP7179981A JPS57186677A JP S57186677 A JPS57186677 A JP S57186677A JP 7179981 A JP7179981 A JP 7179981A JP 7179981 A JP7179981 A JP 7179981A JP S57186677 A JPS57186677 A JP S57186677A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- pressure
- port
- check valve
- spool
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE:To prevent occurrence of cabitation and hinder the oil hydraulic system from hunting or reverse rotation by furnishing a check valve, by-pass, etc. at the end of a spool valve and by setting the spool valve counter-balanced. CONSTITUTION:Connection of the port 112A on the oil pressure source side with the pump will allow supply of pressure oil to the port 112A on the oil pressure source. As a result, a check valve 118A is opened and pressure oil is supplied to the port 113A on the actuator side through oil lines 117A, 116A. At the same time, the pressure oil in the port 112A on oil pressure source side is supplied also to the oil line 115A, and action of this pressure oil on the check valve 123A through oil lines 127A, 128A will permit the check valve 123A to open. This is further sent to the pilot chamber 120A through oil line 129A and shifts the spool 114 rightwise. Because the oil line 115A is in communication with a by-pass 125A through an orifice 130A, the pressure oil flows into the pilot chamber 120A also from the by-pass 125A, and the spool 114 shifts leftwise.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7179981A JPH0240912B2 (en) | 1981-05-13 | 1981-05-13 | KAUNTABARANSUBEN |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7179981A JPH0240912B2 (en) | 1981-05-13 | 1981-05-13 | KAUNTABARANSUBEN |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57186677A true JPS57186677A (en) | 1982-11-17 |
JPH0240912B2 JPH0240912B2 (en) | 1990-09-13 |
Family
ID=13470963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7179981A Expired - Lifetime JPH0240912B2 (en) | 1981-05-13 | 1981-05-13 | KAUNTABARANSUBEN |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0240912B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6154501U (en) * | 1984-09-13 | 1986-04-12 |
-
1981
- 1981-05-13 JP JP7179981A patent/JPH0240912B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6154501U (en) * | 1984-09-13 | 1986-04-12 | ||
JPH0329649Y2 (en) * | 1984-09-13 | 1991-06-24 |
Also Published As
Publication number | Publication date |
---|---|
JPH0240912B2 (en) | 1990-09-13 |
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