| 摘要 |
1,114,825. Hydropneumatic dampers; pistons. BOFORS A.B. 4 Nov., 1965 [4 Nov., 1964], No. 46826/65. Headings F2S and F2T. [Also in Division E2] A hydro-pneumatic damper comprises a piston 11 and cylinder 10 assembly, the pistonrod 8 being connected to the piston 11 by a ball 9 and socket joint. A bore 21 is provided in the piston communicating with the socket-defining surface of the joint such that hydraulic fluid from the cylinder lubricates thejoint. An O- ring 24 and anti-extrusion ring 27 assembly is provided in a, groove 23 of the piston to cooperate with the ball 9, the O-ring 24 being urged. against the ball 9 by hydraulic fluid working in one or more bores 22 communicating with the groove A further bore 25 communicates, with an annular space 26 formed in the periphery of the piston 11. |
