Brakes – Internal-resistance motion retarder – Controlled by an operator remote from retarder
Patent
1990-05-29
1991-07-02
Halvosa, George E. A.
Brakes
Internal-resistance motion retarder
Controlled by an operator remote from retarder
188314, 188319, 18832215, 251122, 280714, F16F 946
Patent
active
050279270
ABSTRACT:
A variable rate shock absorber comprising a tubular working cylinder (10) destined to be mounted on a suspended part of a vehicle, a piston rod assembly (24) slidably received in the working cylinder (10) and having an end (34) destined to be mounted on a fixed part of a vehicle, the piston rod assembly (24) having at its free end a piston member (48) cooperating with the working cylinder (10) to divide the interior thereof into an upper (44) and a lower working chamber (56), a valve mechanism in the piston member (48) to permit controlled two-way flow between the upper and lower working chambers an electro-magnetic valve mechanism (62) disposed between the upper working chamber (44) and a reservoir (18) and selectively actuatable to allow fluid flow therebetween, the valve mechanism (62) comprising a first member (80, 114) slidably mounted with respect to a second member (72, 116) between a closed position and an open position, characterized in that the first member (80, 114) is movable into at least one partially open position, the position defined by at least one stepped valve surface (94, 100, 126) formed on one member (80, 116).
REFERENCES:
patent: 1929973 (1933-10-01), Haley
patent: 2007051 (1935-07-01), Hirvonen
patent: 2485349 (1949-10-01), Bass
patent: 3039566 (1962-06-01), Rumsey
patent: 4682675 (1987-07-01), Eddy, Jr.
patent: 4696379 (1987-09-01), Yamamoto et al.
patent: 4726453 (1988-02-01), Obstfelder et al.
Bendix Espana S.A.
Decker Ken C.
Halvosa George E. A.
Palguta Larry J.
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