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Title:
CHECK VALVE FOR HYDRAULIC CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
Japanese Patent JP3954910
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To solve a conventional problem of incapability of inserting a check valve wholly through a main circuit when it is inserted in a perpendicular direction to the main circuit in the case two hydraulic continuously variable transmissions are disposed side-to-side on a single oil passage plate.
SOLUTION: In this check valve 35, a sleeve 36 is slidably engaged in the direction of a main oil passage with a valve hole 32h, and a seat member 37 is engaged with the valve hole 32. A coil spring 38 to energize the sleeve is provided to disconnect the main oil passage from a charge circuit 32c when the sleeve is in an abutment state with the seat member. When the sleeve is in a separated state from the seat member, the main oil passage is communicated with the charge circuit. Outer diameter of a seating part of the seat member to be seated on a step part 36f between the valve hole and the main circuit is set to be smaller than outer diameter of the sleeve. The sleeve is formed with a step to have a small diameter part 36b and a large diameter part 36b, and the outer diameter of the seat member is similar to or smaller than the outer diameter part of the sleeve.


Inventors:
野崎 豪朗
望月 安久
笹原 謙悟
Application Number:
JP2002000181349
Publication Date:
August 08, 2007
Filing Date:
June 21, 2002
Export Citation:
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Assignee:
ヤンマー株式会社
International Classes:
F16K15/02; F16H39/10; F16H61/40; (IPC1-7): F16H61/40; F16H39/10; //F16K15/02
Domestic Patent References:
JP2001116108A
JP10002436A
JP5094587U
JP4056987U
JP2001099340A
Attorney, Agent or Firm:
矢野 寿一郎