B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
B62D 5/09 (2006.01) F15B 13/14 (2006.01) F16F 9/512 (2006.01)
Patent
CA 2284435
A damper valve for a hydraulic power steering device is disposed in a hydraulic oil circuit connecting an oil passage changing-over valve in a gear box and left and right oil chambers of a power cylinder. It is provided with a piston valve which is opened by through-flow of hydraulic oil returned back to the oil passage changing-over valve from either one of the left and right chambers of the power cylinder, and a check valve which is disposed in a valve body of the piston valve and which allows only hydraulic ail supplied from the oil passage changing-over valve to either one of the left and right chambers of the power cylinder to flow through the check valve. The piston valve is structured such that a throttle oil passage is formed by through flow of the returned hydraulic oil having an oil pressure of a predetermined value or less, and a fully opened oil passage is formed by through flow of the returned hydraulic oil having an oil pressure of more than the predetermined value. Oil passages for the returned-back hydraulic oil are formed in the valve body of the piston valve.
Aiko Satoshi
Hamano Satoshi
Serizawa Akihiko
Macrae & Co.
Showa Corporation
LandOfFree
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