Self-closing gas pipes and pipe joints

Details Self-closing gas pipes and pipe joints Self-closing gas pipes and pipe joints

1978-02-13

1981-05-19

Schwadron, Martin P.

Fluid handling

Destructible or deformable element controlled

73363, 137 79, 251 4, 260 4234, 423448, 521 82, F16K 1738, C01B 3104

Patent

active

042678536

ABSTRACT:
A gas pipe including a tube of expansible material defining a passage for gas and capable of expansion, when heated, to close the passage upon carbonization. The tube is surrounded by a cylindrical noninflammable member.
A joint for connecting gas pipes which includes a tube of expansible material contained in a metallic tubular member and defining a passage for gas. The tube is capable of expansion, when heated, to close the passage upon carbonization.
A method of manufacturing thermally expansible rubber tube for the gas pipe and the gas pipe joint. About 2 to 30 parts by weight of oxidized, thermally expansible graphite powder is mixed with 100 parts by weight of raw rubber, and a predetermined quantity of a curing agent and a cure accelerator are added to the rubber and graphite mixture, followed by its formation into a tubular shape.

REFERENCES:
patent: 3156263 (1964-11-01), Adelman
patent: 3431970 (1969-03-01), Olstowski et al.
patent: 3542746 (1970-11-01), Eckardt et al.
patent: 3904111 (1975-09-01), Petersson
patent: 4072159 (1978-02-01), Kurosawa

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