Spring devices – Vehicle – Mechanical spring and nonresilient retarder
Patent
1988-07-12
1990-10-23
Kashnikow, Andres
Spring devices
Vehicle
Mechanical spring and nonresilient retarder
267 6412, 267 6415, 188284, 188288, 188300, 18832219, 280276, F10F 500, F16F 148
Patent
active
049646257
ABSTRACT:
A hydraulic damper has an oil lock mechanism for preventing bottoming when the hydraulic damper is fully compressed. The hydraulic damper also includes an outer tube, an inner tube, a cylinder movable with the inner tube, a piston rod movable with the outer tube, a piston fixed to a distal end of the piston rod, and a coil spring disposed in the inner tube. The oil lock mechanism comprises an oil lock piece mounted on an upper end of the cylinder, and an oil lock tube disposed concentrically between the cylinder and the inner tube and having a larger-diameter portion which can be spaced from the oil lock piece when the hydraulic damper is extended and a smaller-diameter portion which can be held in sliding contact with the oil lock piece when the hydraulic damper is compressed.
REFERENCES:
patent: 1234311 (1917-07-01), Duncay
patent: 2819893 (1958-01-01), Edwards
patent: 4345748 (1982-08-01), Wossner et al.
patent: 4367882 (1983-01-01), Alexander et al.
patent: 4424980 (1984-01-01), Tsukamoto et al.
patent: 4561669 (1985-12-01), Simons
Kabushiki Kaisha Showa Seisakusho
Kashnikow Andres
Potosnak Richard
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