Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1974-06-07
1976-09-21
Lanham, C.W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
205273, 418178, 427 34, F01C 2100, F04C 1500
Patent
active
039816885
ABSTRACT:
A rotor housing for a rotary internal combustion engine is disclosed having a wear-resistant coating system characterized by high temperature hardness stability and controlled porosity to improve the lubricating characteristics of the surface-to-surface engagement with the rotary apex seals. The coating system comprises a self-fused composite of martensitic stainless steel powder and an equally hard powder consisting of a nickel-based alloy. Powder particle size is controlled to render a smoother machined surface and sub-surface porosity. An intermediate transition coating may be used consisting of a composition selected from nickel aluminide, are sprayed nickel, molybdenum, all effective to operate as a bonding intermediate to a supporting aluminum structure.
A method of producing the wear-resistant coating system for a rotor housing is disclosed, comprising preparation of an aluminum casting having a supporting epitrochoid end wall, machining a reference, embedment of thermally resistant plugs about certain openings in the end wall, removing a uniform layer of said casting end wall to a predetermined depth, soft grit blasting of the removed surface, coating of the margins about ports in the end wall with an anti-bond material flame spraying the entire end wall with a mixture of martensitic stainless steel and a nickel-based alloy, immersing said coated casting in oil for a predetermined period of time immediately after coating, and grinding off a portion of said coating to the depth of said reference.
REFERENCES:
patent: 3239135 (1966-03-01), Fritz
patent: 3295198 (1967-01-01), Coan
patent: 3512907 (1970-05-01), Belzner
patent: 3674544 (1972-07-01), Grosseau
patent: 3705818 (1972-12-01), Grosseau
Telang Yeshwant P.
Uy James C.
Crane Dan C.
Ford Motor Company
Lanham C.W.
Malleck Joseph W.
Zerschling Keith L.
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