| 摘要 |
<p>373,510. Hydraulic shock-absorbers- STEVENS, A. H., 5, Quality Court, Chancery Lane, London.-(Delco Products Corporation ; 329, East 1st Street, Dayton, Ohio, U.S.A.) Sept. 15, 1931, No. 25875. [Class 108 (iii).] In apparatus in which a double-ended piston 31, 32 is reciprocated by a lever 45, the compression chambers 50, 51, corresponding respectively to spring compression and spring rebound, are each provided with a pressure release valve to permit the flow of fluid into the opposite chamber, the spring compression valve providing a fixed orifice for small movements and an additional opening for larger movements, while the rebound valve provides successively different openings according to the rate of movement.. During spring compression, liquid flows from the chamber 51 through the passage 53 to the valve chamber 64, which communicates by the opening 71 with a passage 52 leading to the other compression chamber 50. For small movements, liquid flows through a groove. 70 in the fixed stem 67 while for larger movements, the valve 68, which slides on the stem 67, is forced off its seat against the resistance of the spring 69. The rebound valve 58 is forced on to its seat by a light spring, 61. For small rebound movements liquid flows from the passage 52 through the gap between the stem 60 of the valve and the passage ; while for larger movements the stem moves out of the passage 52 and the valve then abuts against the stronger spring 62, thus providing a larger opening but with increased resistance to further movement. The compression chambers are replenished with liquid from the central reservoir 25 through passages in the piston leading to one-way valves 37, 40. Wear pieces 43, 44 are held up to the operating lever 45 by springs 47.</p> |
