Hydraulic damper

Details Hydraulic damper Hydraulic damper

1981-09-25

1984-01-31

Halvosa, George E. A.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

13754319, 18832214, 18832215, F16F 934

Patent

active

044284640

ABSTRACT:
A hydraulic damper includes coaxial inner and outer tubes, a piston working in the inner tube and partitioning the interior thereof into first and second liquid chambers, a piston rod secured to the piston and extending through the first liquid chamber to the outside of the damper through upper ends thereof, a rod guide supporting the upper ends of the inner and outer tubes and slidably guiding the piston rod, a base cap supporting the lower ends of the inner and outer tubes, a reservoir chamber defined between the inner and outer tubes and containing therein liquid and gas, and a bottom valve mechanism mounted on the lower end of the inner tube for controlling liquid flow between the second liquid chamber and the reservoir chamber. The bottom valve mechanism comprises a valve seat mounted on the lower end of the inner tube, a rigid valve body having an orifice passage, a spring biasing the valve body toward the valve seat, and an inverted U-shaped valve guide guiding the movement of the valve body toward and away from to the valve seat.

REFERENCES:
patent: 2320697 (1943-06-01), Binder
patent: 3763970 (1973-10-01), Anderson
patent: 4238009 (1980-12-01), Wossner et al.
patent: 4298102 (1981-11-01), Nishikawa et al.

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