Reciprocating piston engines

Details Reciprocating piston engines Reciprocating piston engines

2007-07-24

2007-07-24

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Two-cycle

Rear compression

C123S0650VD

Reexamination Certificate

active

10523190

ABSTRACT:
A reciprocating piston engine has a cylinder with a transfer port and an exhaust port, wherein the transfer port and exhaust port are at least partially coincident and are provided with a port valve. The engine includes a pump having a divided chamber therein, one side of the chamber being connected to a crankcase via a connecting port, and the other side of the chamber having an inlet port, an outlet port, and a valve to ensure unidirectional flow therethrough. The chamber is divided by a moving member responsive to variations in pressure in the crankcase to cause flow through the other side of the chamber.

REFERENCES:
patent: 4191141 (1980-03-01), Franke
patent: 5267535 (1993-12-01), Luo
patent: 5403164 (1995-04-01), Gama
patent: 31 31 805 (1983-03-01), None
International Search Report for PCT Application No. PCT/GB2003/003311; Filed Jul. 30, 2003; Date of Completion Dec. 10, 2003; Date of Mailing Dec. 17, 2003.

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