Engine piston with rolling element skirt

Details Engine piston with rolling element skirt Engine piston with rolling element skirt

2011-05-10

2011-05-10

Lazo, Thomas E (Department: 3745)

Expansible chamber devices

Piston

With ball or roller anti-friction means on side wall portion

C092S227000

Reexamination Certificate

active

07938058

ABSTRACT:
The present invention utilizes rolling elements, such as balls or rollers acting as bearings carried in openings in the skirt or equivalent portion of a piston, to engage the cylinder walls and replace the sliding bearings of the skirt with the roller elements in the skirt. The rolling elements then absorb all or some of the thrust loads conventionally absorbed by the skirt walls sliding along surfaces of an associated cylinder and thereby reduce the friction forces developed by the reciprocating action of the piston skirt.

REFERENCES:
patent: 1752816 (1930-04-01), Sologaistoa
patent: 3327593 (1967-06-01), Ciaccia
patent: 3398653 (1968-08-01), Foster
patent: 4485728 (1984-12-01), Bando
patent: 4704949 (1987-11-01), Foster
patent: 5437220 (1995-08-01), Cheng et al.
patent: 5615600 (1997-04-01), Cheng et al.

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