Piston ring

Details Piston ring Piston ring

2011-08-16

2011-08-16

Lopez, F. Daniel (Department: 3745)

Expansible chamber devices

Piston

Radially adjustable side wall portion

C277S451000, C277S456000, C277S457000

Reexamination Certificate

active

07997185

ABSTRACT:
A piston has a body with a first circumferentially disposed groove. A first ring is movably disposed within the first groove. The first ring defines an inner circumferential groove. A blocking ring is at least partially located in the groove of the first ring and the groove of the piston. One or more vent passages may connect a first volume in the piston to a second volume outside the piston.

REFERENCES:
patent: 1699135 (1929-01-01), Cronin
patent: 1749832 (1930-03-01), Morton
patent: 2052077 (1936-08-01), Bristow
patent: 2228495 (1941-01-01), Williams
patent: 2631907 (1953-03-01), Johnson, Jr.
patent: 2634179 (1953-04-01), Haverly
patent: 2670259 (1954-02-01), Bergeron
patent: 2967745 (1961-01-01), Stevens
patent: 3656770 (1972-04-01), Hoffmann
patent: 4592559 (1986-06-01), Harvey
patent: 4669369 (1987-06-01), Holt et al.
patent: 5001965 (1991-03-01), Ruddy et al.
patent: 5039116 (1991-08-01), Maeda
patent: 5253877 (1993-10-01), DeBiasse et al.
patent: 5474307 (1995-12-01), DeBiasse et al.
patent: 5634179 (1997-05-01), Umeda et al.
patent: 6705616 (2004-03-01), Fujii et al.
patent: 7188841 (2007-03-01), Sytsma et al.
patent: 2001/0048199 (2001-12-01), Evans
patent: 2003/0006562 (2003-01-01), Feistel
patent: 2003/0015163 (2003-01-01), Fujii et al.
patent: 2005/0051970 (2005-03-01), Edelmann
patent: 1515792 (2004-07-01), None
patent: 1431631 (2003-10-01), None
patent: 2 117 868 (1983-10-01), None
patent: 60-109688 (1985-06-01), None
patent: 11201283 (1999-07-01), None
patent: 2003294141 (2003-10-01), None

Affiliated with

Also associated with

Rating

Piston ring does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Piston ring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piston ring will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2694026