Crankshaft assembly of an internal combustion engine

Details Crankshaft assembly of an internal combustion engine Crankshaft assembly of an internal combustion engine

2007-02-20

2007-02-20

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Transmission mechanism from piston

C123S197400

Reexamination Certificate

active

11072343

ABSTRACT:
The invention is directed to a crankshaft (1) of an internal combustion engine including an internal combustion engine for a portable handheld work apparatus such as a motor-driven chain saw or the like. The invention is also directed to a method for making the crankshaft (1) as well as an internal combustion engine with a corresponding crankshaft (1). The crankshaft (1) is made up of separately manufactured parts and includes a crank arm (2) having a central cutout (3) for accommodating a shaft lug (4) of the crankshaft (1) and an eccentric cutout (5) for accommodating a crank pin (6). The crank pin (6) journals a connecting rod (7). A centrifugal mass portion (8) is provided on the crank arm (2) at its end lying opposite the eccentric cutout (5). The centrifugal mass portion (8) is configured as one piece with the crank arm (2) and is bent out of a plane (9) of the crank arm (2) in the direction of the connecting rod (7).

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