| 摘要 |
861,162. Hydraulic shock absorbers. DE KONING, A. A., and DE KONING, K. K. K. Feb. 21, 1957 [Feb. 24, 1956], No. 5939/57. Class 108(3). A piston 3 (Fig. 2) and piston rod 6 are rigid with a piston valve member 5 which operates in conjunction with ports 10 in the cylinder wall leading to an annular reserve chamber C. The chamber C is also connected with the cylinder by means of a spring loaded valve 11. The piston valve 5 is provided with open ports 14 between its opposite faces. A valve 13 permits flow through the piston 3 on inward movement of the piston rod 6, only. In a modification (Fig. 1, not shown), the piston 3 is omitted and there is a conventional base-valve assembly between the cylinder and the chamber C. In a modification of the latter construction the valve 11 is mounted in the piston valve 5. In another modification of the construction of Fig. 2 (Fig. 5, now shown), the positions of the piston 3 and piston valve 5 on the piston rod 6 are interchanged and there is a base valve assembly as in the construction of Fig. 1. In the latter construction, the piston 3 is by-passed by passages disposed in the wall of the cylinder. In Fig. 5 the piston 3 is formed with a diametrically opposed pair of peripheral recesses 25 which are staggered both radially and axially with respect to a pair of similar recesses 17. The recesses 25 are each connected by ports 36 controlled by one way valve 37 with the cylinder space a above the piston 3 and by ports 14 with the cylinder space below the piston. The recesses 17 are connected by ports 24 with the outlet side of a valve 18 which is spring loaded against the outlet of a passage 23 leading to the space a. The arrangement is such that in operation, when the piston is moving either inwards or outwards away from the normal position relative to the cylinder, there is no damping action. When the piston is moving either inwards or outwards back to the normal position there is a damping action. |
