| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure shutoff device for a power steering device capable of being adjusted many times and also being adjusted by easily steering a steering wheel manually. SOLUTION: In a pressure shutoff device for a power steering device at stationary steering end position, a power steering device comprises at least one operating piston 2 axially slidable in a steering case 1. The operating piston defines two operating chambers 1, a shutoff valve 7 is provided in the operating piston 2, contact means 13 is provided in the steering case 1, the contact means 13 is slidable in axial direction, and each of the shutoff valves 7 is brought into contact with the contact means at an end position to be opened to shut off a pressure. The contact means 13 is fixed frictionally, using a spring 14 acting in radial direction, by a holding force exceeding an opening force of the shutoff valve 7.
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