Valves and valve actuation – Valve – Seats
Reexamination Certificate
2006-07-04
2006-07-04
Bastianelli, John (Department: 3751)
Valves and valve actuation
Valve
Seats
C251S368000, C029S890122
Reexamination Certificate
active
07070166
ABSTRACT:
Methods and apparatus are disclosed for making substantially nonporous powdered metal (P/M) inlays on substrates using hot-isostatic-pressure (HIP). Methods described herein differ from conventional practice in their use of new apparatus for steps including: formation and maintenance of a P/M preform through use of an adjustable sliding element; application of increased pressure to a P/M preform via the adjustable sliding element; and evacuation of space around a P/M preform without the need to totally enclose a P/M preform and its substrate in a can. Certain embodiments provide for leak testing of welded seals prior to HIP, and other embodiments make the use of welded seals unnecessary.
REFERENCES:
patent: 2163472 (1939-06-01), Shimer
patent: 4860995 (1989-08-01), Rogers
patent: 5088521 (1992-02-01), Johnson
patent: 5193577 (1993-03-01), de Koning
patent: 5226445 (1993-07-01), Surjaatmadja
patent: 6701955 (2004-03-01), McIntire et al.
Bastianelli John
Gilstad Dennis W.
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