Powdered metal inlay
OwnerGeorge H. Blumeinventor
Life of this patent
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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.
Claims24
A valve seat form comprising
- a circular wall around a cylindrical void, said circular wall being substantially symmetrical about a longitudinal axis and having a first end spaced apart from a second end, as well as an inner surface spaced apart from an outer surface;
- a circular depression in said circular wall first end between said circular wall inner and outer surfaces, said circular depression comprising cylindrical inner and outer depression walls coaxial with said circular wall, said inner and outer depression walls being spaced apart from each other and extending from said circular wall first end toward said circular wall second end to a depression bottom surface, said depression bottom surface extending between said inner depression wall and said outer depression wall;
- and
- a transverse web extending from said circular wall inner surface completely across said cylindrical void adjacent to said circular wall first end, peripheral portions of said transverse web being integral with said circular wall inner surface.
A valve seat form comprising
- a circular wall around a cylindrical void, said circular wall being substantially symmetrical about a longitudinal axis and having a first end spaced apart from a second end, as well as an inner surface spaced apart from an outer surface;
- and
- a circular depression in said circular wall first end between said circular wall inner and outer surfaces, said circular depression comprising cylindrical inner and outer depression walls coaxial with said circular wall, said inner and outer depression walls being spaced apart from each other and extending from said circular wall first end toward said circular wall second end to a depression bottom surface, said depression bottom surface extending between said inner depression wall and said outer depression wall;
- wherein said depression bottom surface comprises at least one circular sloping surface, one said circular sloping surface being substantially symmetrical about said longitudinal axis and sloping generally from said outer depression wall toward said inner depression wall and simultaneously toward said circular wall second end.
Dependencies are inferred from the claim text.