Hydro-pneumatic damping device

Details Hydro-pneumatic damping device Hydro-pneumatic damping device

1980-01-25

1981-09-08

Bernstein, Hiram

Brakes

Internal-resistance motion retarder

Using diverse fluids

188315, F16F 906

Patent

active

042879701

ABSTRACT:
A hydro-pneumatic damping device particularly for spring legs of automotive vehicles comprises an inner cylinder, an outer container, a central cavity within the inner cylinder, an annular cavity between the inner cylinder and the outer container, a piston rod with a piston unit, venting passage means between the central cavity and the annular cavity extending across a cylinder closing unit and check valve means associated to said venting passage means. The check valve means comprise an annular check valve member in frictional sliding engagement with the piston rod for axial movement with the piston rod toward a sealing position during inward movement of the piston rod and toward an opening position during outward movement of the piston rod, first and second abutment means being provided for defining said sealing position and said opening position of said annular check valve member respectively.

REFERENCES:
patent: 3365191 (1968-01-01), Ellis et al.
patent: 3519109 (1970-07-01), Whisler
patent: 3520384 (1970-07-01), Nicholls
patent: 3661236 (1972-05-01), Wossner
patent: 3804216 (1974-04-01), Katsumori et al.
patent: 4132395 (1979-01-01), Fox
patent: 4189033 (1980-02-01), Katsumori

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