Piston assembly with wear resistant piston ring lands

Details Piston assembly with wear resistant piston ring lands Piston assembly with wear resistant piston ring lands

1991-06-13

1991-12-31

Look, Edward K.

Expansible chamber devices

Piston

Nonmetallic portion

92255, 92257, 92258, 277123, 277125, 277188R, 277DIG6, 277102, 277 75, F16J 900

Patent

active

050761501

ABSTRACT:
The Assembly comprises a piston body having a longitudinal axis to which are added, in interlayered fashion, separate, piston-ring lands and spacers. In one embodiment, a pair of rider rings are coupled to the piston body, in spaced apart locations, to guide the piston assembly in reciprocation, and to space the piston-ring lands away from the surface of an enclosing cylinder. The lands have a diameter which is slightly less than that of the rider rings. The lands are formed of ceramic to offer, thereby, a substantially wear-resistant surface to the piston rings which are set between pairs of the lands, and about the spacers. The body is centrally bored and tapped, and the lands and spacers are centrally apertured; a headed bolt has the shank thereof in penetration of the lands, spacers and rider rings, and threadedly engaged with the tapped bore, to secure the assembly together.

REFERENCES:
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patent: 4556223 (1985-12-01), VanLoon et al.
patent: 4751871 (1988-06-01), Burghardt et al.
patent: 4833977 (1989-05-01), Haahtela et al.
patent: 4890542 (1990-01-01), Miller et al.

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