Self sealing seal

Details Self sealing seal Self sealing seal

1991-10-07

1992-07-07

Carone, Michael J.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

F16J 1546

Patent

active

H00010693

ABSTRACT:
A spring tension retained, gas pressure actuated annular piston is mounted n a centered gas tube disposed within an outer gas tube connected to a gas flow tube. The annular piston which is positioned around the centered gas tube and within the outer gas tube is connected to a retractable tension spring positioned on the outer surface of the center tube. In the absence of gas pressure, the force of the tension spring retracts the annular piston away from the mating surface of the structure to which it is mated or to be mated, but subsequently, after gas pressure is applied to the annular piston the force of tension spring is overcome, and mating of surfaces of piston-seal and the structure to be mated takes place to achieve a firm seal without damaging the interface seal disposed between piston and mating surface. The self-sealing seal is employed to connect two sections of a gas supply tube during missile assembly procedure. If disassembly of missile sections or other structure is required, gas pressure is removed and the tension spring retracts the piston-seal from the mating surface. The surface area of the annular piston is sized to achieve a force for sealing proportional to the gas pressure.

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