Piston having laser hardened primary compression ring groove and

Details Piston having laser hardened primary compression ring groove and Piston having laser hardened primary compression ring groove and

1994-12-05

1996-05-14

Denion, Thomas E.

Expansible chamber devices

Piston

Open-ended hollow skirt type

92231, 92208, 29888049, 1231936, 21912174, F16J 104

Patent

active

055157700

ABSTRACT:
The piston made in accordance with the teachings herein includes a primary compression ring groove, a bottom and rear wall surface of which are hardened by the method of laser hardening. The method includes the steps of spraying the primary groove with a graphite spray and then directing an angled elliptical in cross section laser beam at the bottom surface of the groove while rotating the cylinder head at predetermined parameters.

REFERENCES:
patent: 4074616 (1978-02-01), Gale et al.
patent: 4125926 (1978-11-01), Gale et al.
patent: 4161321 (1979-07-01), Hendrixon et al.
patent: 4299401 (1981-11-01), McCormick
patent: 4299860 (1981-11-01), Schaefer et al.
patent: 4360956 (1982-11-01), Hiller
patent: 4547650 (1985-10-01), Arditty et al.
patent: 4643079 (1987-02-01), Brann et al.
patent: 4899702 (1990-02-01), Sasaki et al.
patent: 5285045 (1994-02-01), Ito et al.

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