Lightweight piston

Details Lightweight piston Lightweight piston

2011-06-07

2011-06-07

Leslie, Michael (Department: 3745)

Expansible chamber devices

Piston

Open-ended hollow skirt type

C092S160000

Reexamination Certificate

active

07954421

ABSTRACT:
A piston has a piston head that is provided with a field of rings and a piston shaft which is disposed thereupon. The piston shaft is equipped with supporting shaft wall sections and rear connecting walls which interconnect the shaft wall sections, have an arched shape, and are fitted with a bolt bore. An undercut free space is provided below the annular field in the area of the bolt bore in the region of the piston head. An arched zone is disposed in the interior of the piston at the transition from the bolt bore in the direction of the shaft wall session.

REFERENCES:
patent: 3515035 (1970-06-01), Cuddon-Fletcher
patent: 4989559 (1991-02-01), Fletcher-Jones
patent: 6862977 (2005-03-01), Glinsner et al.
patent: 19918328 (1999-10-01), None
patent: 10145589 (2003-04-01), None
patent: 1348859 (2003-10-01), None
patent: 200179398 (2000-06-01), None
patent: 2001295696 (2001-10-01), None
patent: 2001295697 (2001-10-01), None
International Search Report dated Nov. 30, 2006.
Preliminary International Opinion on Patentability.
English translation of the previously cited German language International Preliminary Report on Patentability.

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