Hydropneumatischer Stossdaempfer

摘要

451,901. Hydraulic shock-absorbers. SOC. D'INVENTIONS AERONAUTIQUES ET MECANIQUES S.I.A.M., 1, Route des Alpes, Fribourg, Switzerland. Nov. 27, 1935, No. 32906. Convention date, Dec. 22, 1934. [Class 108 (iii)] A double-acting hydraulic shock-absorber comprises two chambers C<1>, C<2> of variable volume arranged so that when the moving member of the shock-absorber is displaced in one direction the shock-absorbing effect is produced in one chamber while the other chamber is filled with liquid through a large passage or passages communicating for example with a reservoir R common to both chambers, the manner in which each chamber functions being reversed on displacement of the moving member of the shock-absorber in the other direction, each of the chambers having two sets of openings formed in a fixed part thereof, one constantly-open, small set for throttling the flow of liquid and another valved set for allowing passage of liquid freely in the direction to ensure rapid filling of the respective chamber. As shown in Fig. 1, on compression of the shock-absorber, liquid is forced by the piston 1 through an adjustable, restricted aperture 6 into a conduit 5a and up through the hollow piston-rod 5 into the reservoir R the upper portion o f which is filled with compressed air. At the same time liquid passes freely through openings 9 into the chamber C<2>. On expansion of the shockabsorber liquid is forced from the chamber C<2> through restricted apertures 8 in the partition 4, the openings 9 being closed by valves 9, while liquid enters the chamber C<1> freely through openings 7. Grooves 10 in the rod 5 also permit a restricted flow of liquid for both directions of operation of the shockabsorber. In another construction, Fig. 2, the chambers are formed between partitions 14, 14a fixed in a cylinder 11 communicating freely with the reservoir R, and pistons 12, 12 connected by a rod 13 which may have grooves 18, 18. The partitions have restricting orifices 17, 17 and large orifices 15, 15 controlled by valves 16, 16.