Segmented ceramic inlay piston ring

Details Segmented ceramic inlay piston ring Segmented ceramic inlay piston ring

1994-06-24

1996-08-20

DePumpo, Daniel G.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277215, 277216, F16J 900

Patent

active

055472036

ABSTRACT:
A piston ring comprises a generally annular ring body with a series of slots spaced circumferentially about an outer periphery of the ring body, each of the slots extending radially inwardly from the outer periphery. A hinge point is formed between adjacent slots, the hinge point corresponding to the outer periphery of the ring body. A wear surface material comprising ceramics is inlayed into each of the slots. The piston ring is formed by cutting a series of slots such as scallops about the outer periphery of the ring body that extend radially inwardly from the outer periphery and inlaying a wear surface material into the slots. The inlaying step may comprise the further step of thermally spraying the material into the slots. Then the outer periphery of the ring body may be ground to expose the wear surface material and create a finished outer surface.

REFERENCES:
patent: 119248 (1871-09-01), Sullivan
patent: 307334 (1884-10-01), Richards
patent: 1608101 (1926-11-01), Johnson
patent: 2472540 (1949-06-01), Meador
patent: 2696038 (1954-12-01), Hunt
patent: 3560006 (1971-02-01), Watanabe
patent: 3811692 (1974-05-01), Brenneke
patent: 3947607 (1976-03-01), Gazzard
patent: 4037300 (1977-07-01), Garner
patent: 4077637 (1978-03-01), Hyde
patent: 4106782 (1978-08-01), Hyde et al.
patent: 5076150 (1991-12-01), Webber

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