JPS57116909A - Fluid equipment - Google Patents
Fluid equipmentInfo
- Publication number
- JPS57116909A JPS57116909A JP17331581A JP17331581A JPS57116909A JP S57116909 A JPS57116909 A JP S57116909A JP 17331581 A JP17331581 A JP 17331581A JP 17331581 A JP17331581 A JP 17331581A JP S57116909 A JPS57116909 A JP S57116909A
- Authority
- JP
- Japan
- Prior art keywords
- discharging
- pump
- control valve
- port
- rate
- 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.)
- Pending
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To decrease power loss and improve responsibility of the pump in such a way that in a contrivance to control discharging rate from a discharging rate variable pump by means of a pressure control valve, discharging rate and discharging pressure in the pump is made controllable without need of inutile leak flow rate.
CONSTITUTION: A discharging rate variable pump 1 is controlled with its discharging rate in such a way that a swash plate 2, etc. is displaced by means of a cylinder 4. While discharging fluid by the pump 1 is fed through a flow direction control valve 10 to an actuator 50, it is constituted so that it may be circulated through a triple port type pressure control valve 30, etc. back to a reservoir 7a. Said valve 10 provides a flow rate adjusting variable orifice 19 so as to be connected to a fluid return circuit 300 and to control a pressure control valve 30 by the differential pressure in the front and in the rear of said orifice. And a cylinder 4 to be connected to a secondary port 25 of said valve 30 is made to be able to be changed over and connected either to a main flow circuit 8 which has been connected to a primary port 24 or to a reservoir line which has been connected to a port 26.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17331581A JPS57116909A (en) | 1981-10-28 | 1981-10-28 | Fluid equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17331581A JPS57116909A (en) | 1981-10-28 | 1981-10-28 | Fluid equipment |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12588674A Division JPS5151682A (en) | 1974-10-29 | 1974-10-29 | RYUTAISOCHI |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57116909A true JPS57116909A (en) | 1982-07-21 |
Family
ID=15958157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17331581A Pending JPS57116909A (en) | 1981-10-28 | 1981-10-28 | Fluid equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57116909A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995005544A1 (en) * | 1993-08-12 | 1995-02-23 | Komatsu Ltd. | Capacity control device for variable capacity hydraulic pump |
WO2006067892A1 (en) * | 2004-12-21 | 2006-06-29 | Yanmar Co., Ltd. | Hydraulic circuit |
-
1981
- 1981-10-28 JP JP17331581A patent/JPS57116909A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995005544A1 (en) * | 1993-08-12 | 1995-02-23 | Komatsu Ltd. | Capacity control device for variable capacity hydraulic pump |
GB2294558A (en) * | 1993-08-12 | 1996-05-01 | Komatsu Mfg Co Ltd | Capacity control device for variable capacity hydraulic pump |
GB2294558B (en) * | 1993-08-12 | 1997-07-23 | Komatsu Mfg Co Ltd | Displacement control system for variable displacement type hydraulic pump |
US5673557A (en) * | 1993-08-12 | 1997-10-07 | Komatsu Ltd. | Displacement control system for variable displacement type hydraulic pump |
WO2006067892A1 (en) * | 2004-12-21 | 2006-06-29 | Yanmar Co., Ltd. | Hydraulic circuit |
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