Power tool

Details Power tool Power tool

2008-05-20

2008-05-20

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Two-cycle

Rear compression

C123S0650WA, C123S0730SC

Reexamination Certificate

active

07373906

ABSTRACT:
A power tool is driven by a two-stroke engine. The two-stroke engine has a cylinder and a piston reciprocating within the cylinder. The cylinder has a combustion chamber delimited by the piston. The two-stroke engine has a crankcase and a crankshaft rotatably supported in the crankcase and driven by the piston with a connecting rod. The two-stroke engine has one or more transfer passages connecting the crankcase to the combustion chamber in at least one position of the piston. The two-stroke engine has a mixture passage that is connected to a piston-controlled mixture intake provided at the cylinder and supplies a fuel/air mixture. The combustion chamber has an exhaust port provided within the cylinder. The two-stroke engine has a transverse plane dividing the cylinder parallel to and along the longitudinal cylinder axis. The exhaust port and the mixture intake are arranged on the same side of the transverse plane.

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patent: 2002/0152747 (2002-10-01), Blair et al.
patent: 2004/0251564 (2004-12-01), Mavinahally
patent: 2001355451 (2001-12-01), None

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