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US 4,190,239 AGranted
Shock absorber assembly and installation
AssigneeWalter Sticht
InventorGerhard Schwankhart
Life of this patent
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Abstract
A pneumatic shock absorber comprises a cylinder and a piston defining a pressure chamber in the cylinder. The shock absorber has an inlet passage and an outlet passage which communicate with the pressure chamber. The inlet passage is permanently connected to an external compressed air source. A check valve is incorporated in the inlet passage. An adjustable relief valve is incorporated in the outlet passage.
Claims7
A pneumatic shock absorber comprising
- (a) a source of compressed air,
- (b) a cylinder having two ends,
- (c) a piston mounted reciprocably in the cylinder for assuming different axial positions therein, the piston defining
- (1) a pressure chamber in the cylinder adjacent one of the cylinder ends,
- (d) inlet passage means communicating with the pressure chamber,
- (e) conduit means premanently connecting the compressed air source to the inlet passage means for delivering compressed air to the pressure chamber for reciprocation of the piston,
- (f) a check valve in the inlet passage means and responsive to an air pressure in the pressure chamber exceeding the pressure of the compressed air for preventing the escape of compressed air from the pressure chamber,
- (g) an outlet passage means connected to the atmosphere and communicating with the pressure chamber in any of the axial positions of the piston, and
- (h) an adjustable relief valve in the outlet passage and responsive to a pressure in the pressure chamber to which the relief valve is adjusted for venting the said pressure to the atmosphere.
6 more elements
Dependencies are inferred from the claim text.