Reciprocating engine

Details Reciprocating engine Reciprocating engine

2011-04-26

2011-04-26

McMahon, M. (Department: 3783)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

C123S193600

Reexamination Certificate

active

07931003

ABSTRACT:
A reciprocating engine1includes an annular top ring5serving as a first piston ring disposed adjacent to a top surface (head end surface)4of a piston3defining a combustion chamber2; an annular second ring6serving as a second piston ring disposed with the top ring5interposed between the annular second ring6and the top surface4; an annular gas chamber7defined by the top ring5and the second ring6; and a plurality of communicating passages8for allowing the annular gas chamber7and the combustion chamber2to communicate with each other. The top ring5and the second ring6are respectively inclined with respect to an X direction in which the piston3reciprocates, so as to be located further away from each other on a thrust side9than on an anti-thrust side10.

REFERENCES:
patent: 5265565 (1993-11-01), Bando
patent: 7464683 (2008-12-01), Bando
patent: 2006/0070597 (2006-04-01), Bando
patent: 04-091353 (1992-03-01), None
patent: 04-321757 (1992-11-01), None
patent: 4-347352 (1992-12-01), None
patent: 04-347352 (1992-12-01), None
patent: 04-362258 (1992-12-01), None
patent: WO 92/02722 (1992-02-01), None
patent: WO 2004/079177 (2004-09-01), None
International Search Report for PCT/JP2006/308783 mailed Aug. 15, 2006.

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