| 摘要 |
<p>699,949. Hydraulic dampers. GENERAL MOTORS CORPORATION. May 28, 1952 [June 29, 1951], No. 13485/52. Class 108 (iii] The valve mechanism between the reservoir and one of the working chambers of an hydraulic damper comprises three spring-loaded valves 55, 62, 66, liquid flow in one direction being established by the movement of all three valves as a unit, and in the other direction by three successively and differentially restricted flows, firstly through an orifice 57 in the valve 55, secondly by opening by the valve 66 of an orifice 65 in the valve 62, and thirdly by movement of the valve 62 relative to the valve 55 in which it is supported. The orifice 57 is constantly open, and, as shown, is provided by a notch formed in a liner 56. This liner may, however, be dispensed with. The orifice 57 is then formed by a notch cut in the seating of the valve 55. Movement of the valves as a unit in the upward direction is resisted by resilient fingers 76a integral with a ring 76. The damper piston (Fig. 1, not shown) is formed with inner and outer concentric series of ports controlled by two respective valves at opposite ends of the piston. At least one of the valves may have a constantly open orifice. Specification 661,479 is referred to.</p> |
