Title:
BRAKE CONTROL DEVICE FOR HYDRAULIC MOTOR
Document Type and Number:
Japanese Patent JP3104058
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress the increase of a brake release pressure after a brake is released through extremely simple constitution.
SOLUTION: A control device comprises a break release pressure feed oil passage 40 to interconnect a drive pressure feed oil passage 36 to a hydraulic motor 2 and an oil chamber 28 to release a brake through an inlet orifice 42; a pilot valve 44 to normally close a part, situated downstream from the inlet orifice 42 through the force of a spring; a return oil passage connected to a spot situated downstream from the pilot valve 44 and connected to a tank T; and a delay orifice 44c formed at the pilot valve 44. A pressure reduction orifice 44d is formed at the pilot valve 44, the pressure reduction orifice 44d is positioned in such a manner to fully open a return oil passage 52 in the full stroke position of the pilot valve 44.
Inventors:
Toyoura Nobukai
Youichi Kondo
Koh Onda
Youichi Kondo
Koh Onda
Application Number:
JP32533195A
Publication Date:
October 30, 2000
Filing Date:
December 14, 1995
Export Citation:
Assignee:
New Caterpillar Mitsubishi Corporation
International Classes:
F16D57/06; F16D55/36; F16D65/14; (IPC1-7): F16D55/36; F16D65/14
Domestic Patent References:
| JP5016231A | ||||
| JP7190008A |
Attorney, Agent or Firm:
Naozumi Ono