Pneumatic safety seal joint made of elastomer with internal sept

Details Pneumatic safety seal joint made of elastomer with internal sept Pneumatic safety seal joint made of elastomer with internal sept

1985-08-26

1986-11-25

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 2, 277226, F16J 1546

Patent

active

046244654

ABSTRACT:
A pneumatic safety seal joint, made of elastomer, generally designed to be installed in a slot or groove, this joint having an inflatable internal volume under the pressure of a fluid, and an external seal surface. The joint has an internal volume with maximum internal width l and a maximum internal height H and has an internal sealed septum which divides the internal volume into two chambers, each with a means for pressurization. This internal septum is connected to the lateral walls of the joint such that the respective volumes of the two chambers are in a ratio between 0.9 and 1.1 and when l/H is between 1 and 2, the developed width L of this sealed septum is between 1.1 times and 1.4 times l, when l/H is between 2 and 8, the developed width L is such that 1.ltoreq.L.ltoreq.1.21. In case of the puncturing of one chamber the internal septum deforms and comes to press against the wall to be sealed, maintaining the seal. The joint improves the safety of seal devices in the nuclear, aerospace, electronic and medical areas.

REFERENCES:
patent: 2700196 (1955-01-01), Panhard
patent: 3161229 (1964-12-01), Sanders
patent: 3178779 (1965-04-01), Clark et al.
patent: 3262707 (1966-07-01), Williams
patent: 3940152 (1976-02-01), Fournier

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