Apparatus and method for providing shielded atmosphere for weldi

Details Apparatus and method for providing shielded atmosphere for weldi Apparatus and method for providing shielded atmosphere for weldi

1993-10-22

1995-03-21

Bradley, P. Austin

Metal fusion bonding

With means to handle work or product

Including means to orient work or position work portion...

228219, 228 445, 269 481, 219 74, B23K 118

Patent

active

053988620

ABSTRACT:
An apparatus for providing a gas shield includes two radially adjustable walls disposed in spaced relation to each other along a substantially common central axis, each wall including a plurality of radially oriented wall segments defining a substantially flat, round wall having a circumference; a wedge structure for radially displacing the plurality of radially oriented wall segments between an expanded position wherein the circumference of each wall is expanded and a withdrawn position wherein the circumference of each wall is withdrawn; and a conduit for introducing a shield gas into a space defined between the two radially adjustable walls.

REFERENCES:
patent: 2794244 (1957-06-01), Uecker
patent: 3387761 (1968-06-01), Pickard
patent: 3699635 (1972-10-01), Bradley
patent: 3750451 (1973-08-01), Nolan
patent: 3979041 (1976-09-01), Kaneyama
patent: 4436574 (1984-03-01), Long
patent: 4648544 (1987-03-01), Puisais et al.
patent: 4741473 (1988-05-01), Bennett

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