Fluid suspension unit, particularly for heavy motor vehicles

Details Fluid suspension unit, particularly for heavy motor vehicles Fluid suspension unit, particularly for heavy motor vehicles

1987-11-18

1990-04-10

Halvosa, George E. A.

Spring devices

Vehicle

Comprising compressible fluid

188269, 188284, 267 6415, 267 6425, F16F 500

Patent

active

049153641

ABSTRACT:
A fluid suspension unit, particularly for heavy motor vehicles, comprising an outer cylinder and an inner cylinder slidably mounted within the outer cylinder, the outer and inner cylinders defining therein a chamber of variable volume containing hydraulic fluid and compressed gas. A diaphragm divides the chamber into two portions and has an opening therein which is normally closed by a mushroom valve. The upper portion of the chamber has a constant volume and a prefixed pressure and the lower portion has a variable volume and a variable pressure, lower or at most equal to that of the upper portion. The mushroom valve, normally closed, opens mechanically only when the suspension reaches a predetermined degree of compression that is when the pressure in the two portions of the chamber are the same. The valve is closed by gravity when the suspension returns to the same predetermined degree of compression.

REFERENCES:
patent: 770128 (1904-09-01), Teal
patent: 1371648 (1921-03-01), Schmidt
patent: 1439417 (1922-12-01), Holmes
patent: 1457157 (1923-05-01), Galbreath
patent: 1664510 (1928-04-01), Hughes, Jr.
patent: 3000624 (1961-09-01), Cislo
patent: 3168302 (1965-02-01), Burris
patent: 3387840 (1968-06-01), Bechmar et al.
patent: 3391920 (1968-07-01), Schmidt
patent: 3444830 (1966-12-01), Doetcsh
patent: 3524634 (1970-08-01), Schmidt
patent: 3549168 (1970-12-01), Swanson
patent: 3720425 (1973-03-01), Asano et al.

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