Spring devices – Vehicle – Compound
Patent
1989-12-04
1991-10-22
Halvosa, George E. A.
Spring devices
Vehicle
Compound
188299, 267 34, 267 35, 267 6416, 267 6421, 267 6426, 267152, 267220, 267DIG1, 280697, 280710, 280712, 280714, B60G 1132
Patent
active
050588680
ABSTRACT:
A shock absorber for automobile vehicle suspension comprises a cylinder containing a hydraulic fluid, a piston defining a first chamber and a second chamber in the cylinder, and a rod which extends through the second chamber and is connected to the piston. A hydraulic fluid reservoir is able to communicate with the first chamber via a restriction during a rapid compression movement. A control valve is capable of opening a fluid passage between the first and second chambers. The control valve is subject on one hand to the pressure of hydraulic fluid in the first chamber tending to open the valve and, on the other hand, to the actions tending to close the valve, of a return spring and of substantially constant pressure of a fluid contained in a reference chamber, one wall of which is movable with the control valve. An external compensation casing, integral with the rod, grips the shock absorber in sealed manner, and the compensation casing is connected by a pipe to an external source of variable pressure.
REFERENCES:
patent: 1198643 (1916-09-01), Liebau
patent: 3145985 (1964-08-01), DeCarbon
patent: 3178167 (1965-04-01), Menar
patent: 4054277 (1977-10-01), Sirven
patent: 4478396 (1984-10-01), Kawaura
patent: 4688774 (1987-08-01), Warmuth, II
patent: 4720085 (1988-01-01), Shinbori et al.
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