Internal-combustion engines – Oscillating piston – Toroidal cylinder
Reexamination Certificate
2007-08-14
2007-08-14
McMahon, Marguerite (Department: 3747)
Internal-combustion engines
Oscillating piston
Toroidal cylinder
Reexamination Certificate
active
11396733
ABSTRACT:
A pivoted piston for an internal combustion engine. The piston has a pivot pin and an arcuate first sealing surface (12) which describes a circumferential path about the pivot pin which forms a removable and replaceable skirt to the piston. The piston also includes a second arcuate sealing surface which also describes a circumferential path about the pivot pin and which is connected to the first arcuate sealing surface (12) by a piston floor (21). The second arcuate sealing surface is composed of at least two arcuate sealing components (24) which are located on a bed (20) with the components (24) being located on the bed (20) so they will have limited transverse movement on the bed (20). The components (24) have mating faces which restrict the path of combustion gases between the mating faces. The piston further includes side seals which are located in grooves (63) in the side of the piston. A restraining pin (60) assists in locating the seals in the seal grooves (63) and also closes a pressure escape path for the combustion gases. The piston further includes means to allow liquid coolant to pass through the pivot shaft, through liquid cooling galleries in the piston and out of the pivot shaft.
REFERENCES:
patent: 4138984 (1979-02-01), Steidle et al.
patent: 4487167 (1984-12-01), Williams
patent: 4599976 (1986-07-01), Meuret
patent: 4823743 (1989-04-01), Ansdale
patent: 4825754 (1989-05-01), Devand et al.
patent: 5067453 (1991-11-01), Takashima
patent: 5211102 (1993-05-01), Muta
patent: 5222463 (1993-06-01), Farrell
patent: 5595145 (1997-01-01), Ozawa
patent: 5666912 (1997-09-01), McLachlan
patent: 5699757 (1997-12-01), Wollny et al.
patent: 5845611 (1998-12-01), Schmidt et al.
patent: 5890416 (1999-04-01), Thieme et al.
patent: 5983782 (1999-11-01), Lebrun et al.
patent: 2431662 (1976-01-01), None
patent: 2337087 (1999-11-01), None
Hochberg D. Peter
McMahon Marguerite
Mellino Sean
Pivotal Engineering Limited
LandOfFree
Piston for an internal combustion engine 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 for an internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piston for an internal combustion engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3873705