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Patent Searching and Data


Title:
FLOW DIVISION VALVE
Document Type and Number:
Japanese Patent JPS5824661
Kind Code:
A
Abstract:
PURPOSE:To stabilize a spool for opening and closing the preferential flow outlet port of a flow division valve of preferential line type in particular, which divides a pressurized fluid into two directions, by providing a check valve in the spool having a measuring orifice. CONSTITUTION:Oil discharged from a hydraulic pump P is divided by a flow division valve D to a steering control valve B coupled to a steering gear A, and to a working machine control valve C coupled to a working machine E. The flow division valve D includes a spool 12 fitted in the hole 1 of the valve casing 11 and urged by a spring 13. The spool 12 is provided with a preferential flow measuring orifice 19 located around the spool and always connected to an inlet port 15. A check valve 21 for preventing the backward flow from a preferential flow outlet port 17 to the orifice 19 is provided in the spool 12. The spool 12 is moved against the spring 13 depending on the pressure differences between the inlet port 17 and the preferential flow outlet port 17 to reduce the open area of the port 17 by a land 24.

Inventors:
SAKURAI YOSHITSUGU
Application Number:
JP11986382A
Publication Date:
February 14, 1983
Filing Date:
July 12, 1982
Export Citation:
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Assignee:
NIPPON SPINDLE MFG CO LTD
International Classes:
F15B13/06; F15B13/02; (IPC1-7): F15B13/04; F16K11/07
Domestic Patent References:
JPS5122489U1976-02-19
JPS5029247A1975-03-25
JPS5029248A1975-03-25
JPS566564U1981-01-21
JPS5638083U1981-04-10
Attorney, Agent or Firm:
Takayuki Masayuki