Dichtung fuer eine Kolbenstange

摘要

1,090,600. Hydropneumatic shock absorbers. M KATZ-. Dec. 31, 1964 [March 11, 1964], No. 52996/64-. Heading F2S. In a hydro pneumatic telescopic damper of the direct-acting or lever type comprising a piston 11 movable in a liquid filled tube 10 communicating; by means of a foot valve- 28, with an annular-compensating chamber 33 the piston 11 consists of three similar-elements 111, 1111, 11111, two of which 111, 1111 are orientated in the same direction and one 11111in the opposite direction, all of the elements having through bores and a concave face upon which bear valves 251; 2511, 25111 made up of one or more resilient-washers. The opposite faces of the valves 251, 2511, 25111 bear against insert, members. 261, 2611, 26111 with apertures-271, 2711, 27111 on their cylindrical parts which, serve as guides and form, liquid passages of variable cross-section. The profiles of the apertures 271, 2711, 27111 may be-shaped to give the desired damping characteristics. A piston-rod 12, carrying a protective tube 38, passes through a plug 17, which closes the upper ends of the tube 10 and an outer tube 15, and through a fluid-tight packing 19, the compensat. ing chamber 33 accommodating a piece of corru gated heat-conducting sheet metal 36. The foot valve comprises a resilient washer 28, an insert member 29 with apertures 30, and a weak spring 32 all being fitted to a base closure member 18 by a screw 31. In. a modification, Fig. 7, (not shown), the piston comprises-only one element having concave end faces-each associated with a resilient washer, and the foot valve includes a laterally movableinertia type valvewhich, when the damperis fitted to a vehicle, hardens the suspension during e.g. braking and cornering. In a further, modification a damper, adapted to be located, horizontally in a vehicle suspension system, Fig. 8, (not shown), has an inertia mass (42) in the foot valve the mass being movable axially of the damper to obturate a port (46).