Cylinder piston device

Details Cylinder piston device Cylinder piston device

1995-11-20

1998-04-07

Graham, Matthew C.

Brakes

Internal-resistance motion retarder

With means compensating for change in temperature or viscosity

18832217, 18832221, F16F 902, F16F 934, F05F 302, F05F 1502

Patent

active

057353719

ABSTRACT:
According to an illustrative example of the invention, a gas spring is provided with an emergency exit permitting escape of pressurized gas in the event the gas pressure exceeds a predetermined level or in the event of a dangerously high temperature. The emergency exit includes one or more fluid passages connecting the interior of the gas spring to atmosphere and a cooperating seal member for maintaining the fluid passage or passages closed under normal operating conditions. Upon the occurrence of unduly high pressures or temperatures, a destructible or deformable support for the seal or a fluid passage-bearing member permits relative movement of the seal and the cooperating fluid passage so as to open the fluid passage. As an intermediate step of pressure relief, the structure for mounting the gas spring in its environment of use, e.g. a motor vehicle, may be designed to fail under emergency conditions, e.g., fire, thereby permitting a full extension of the piston rod.

REFERENCES:
patent: 4044866 (1977-08-01), Ishida
patent: 4342448 (1982-08-01), Wallis
patent: 4360192 (1982-11-01), Ishida
patent: 4485899 (1984-12-01), Grundei
patent: 4508020 (1985-04-01), Szcupak
patent: 4736824 (1988-04-01), Dony et al.
patent: 4958706 (1990-09-01), Richardson et al.
patent: 4988081 (1991-01-01), Dohrmann
patent: 5064030 (1991-11-01), Wossner
patent: 5088698 (1992-02-01), Wallis
patent: 5454445 (1995-10-01), Kundmuller et al.

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