Metal fusion bonding – Process – With protecting of work or filler or applying flux
Patent
1998-10-20
2000-03-21
Shaw, Clifford C.
Metal fusion bonding
Process
With protecting of work or filler or applying flux
219 74, B23K 9167
Patent
active
060392401
ABSTRACT:
A backpressure controlling device for welding purge gas comprising a vertically oriented cylindrical housing, a water outlet at the bottom of the housing and a water outlet in the wall of the housing and spaced up from the bottom of the housing, the water outlets defining a water volume space in the housing, a gas inlet tube and a concentric gas outlet tube surrounding the gas inlet tube, the gas inlet tube being adjustably positioned in the housing and having a length such that one end thereof extends below the water inlet and the other end thereof extending out of the housing for connection to a pipeline carrying purge gas, the gas outlet tube being secured to a spacer wall spaced from the upper end of the housing and extending to a point above the water outlet and communicating with the exterior of the housing through openings in the wall of the housing above the spacer wall, the housing being of a size such that the volume of the space above the water inlet is at least about one and one-half times as great as the water volume space, whereby when the water volume space is filled with water, the water is unable to flow out of the gas inlet tube or the gas outlet tube at any position of the housing.
REFERENCES:
patent: 3614378 (1971-10-01), Goodell et al.
patent: 4723064 (1988-02-01), Bothe, II
patent: 5304776 (1994-04-01), Buerkel et al.
patent: 5396039 (1995-03-01), Chevrel et al.
patent: 5425492 (1995-06-01), Thode
patent: 5597109 (1997-01-01), Ohmi et al.
Dutton, Jr. Harold H.
Shaw Clifford C.
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