Patent ID: 7069723
Filing Date: 2006-07-04
Classification: F15B

Abstract:
1. An anti-reaction valve device comprising: a casing provided with a primary port and a secondary port and a valve passage through which the primary and secondary ports fluidically communicate with each other; a plunger slidably provided in the casing; a sheet member slidably provided in the casing, the sheet member being movable to contact with the plunger to close the valve passage and being movable away from the plunger to open the valve passage; a spring drive means configured to drive the plunger and the sheet member by exerting a spring force to the plunger and the sheet member in such a manner that, the plunger and the sheet member move away from each other a one-way valve means provided between the secondary port and an open and close control chamber, and configured to inhibit a flow of the hydraulic fluid from the secondary port to the open and close control chamber.