Device for hindgas coverage in tube welding

Details Device for hindgas coverage in tube welding Device for hindgas coverage in tube welding

1990-11-13

1992-06-30

Shaw, Clifford C.

Electric heating

Metal heating

Nonatmospheric environment at hot spot

219 60R, 219136, B23K 900

Patent

active

051265265

ABSTRACT:
A device for hindgas coverage in welding tube pieces (2,3) together comprises two sealing devices (5,6) connected by a rod (7). The sealing devices comprise a first web part (10) with sealing means (8) and a supply duct (11) for hindgas, and a second web part (9) with sealing means (8,25) and discharge ducts (19,20) for controlled outflow of gas to the surroundings. Some of the surfaces of each web part have a two-dimensional curvature (26) for forming the sealing means (8), e.g. rubber discs.

REFERENCES:
patent: 2966576 (1960-12-01), Nowotny
patent: 2985746 (1961-05-01), Harmes
patent: 3194466 (1965-07-01), Davis
patent: 3387761 (1968-06-01), Pickard
patent: 4101067 (1978-07-01), Sloan et al.
patent: 4302652 (1981-11-01), Nobileau et al.
patent: 4828160 (1989-05-01), Sundholm

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