Balancer system for internal combustion engine

Details Balancer system for internal combustion engine Balancer system for internal combustion engine

1990-07-10

1991-08-13

Kamen, Noah P.

Internal-combustion engines

Vibration compensating device

74603, F02B 7506

Patent

active

050387316

ABSTRACT:
A balancer system for suppressing vibrations in an internal combustion engine for a motorcycle has pair of balancer shafts, and a pair of first and second primary counterbalances supported on the balancer shafts, respectively, for rotation about axes parallel to the crankshaft of the engine in ganged relation to the crankshaft at the same speed as and in the opposite direction to the crankshaft. The balancer shafts extend parallel to the crankshaft and are positioned one on each side of the crankshaft. The first and second primary counterbalances are rotatable about respective centers which are connected by a line passing through a substantially central portion of the crankshaft, the first and second primary counterbalances being rotatably supported on the balancer shafts near ends thereof, with the centers being spaced from the central portion of the crankshaft by substantially equal distances.

REFERENCES:
patent: 3401579 (1968-09-01), Derrig
patent: 3511110 (1970-05-01), Grieve
patent: 4508069 (1985-04-01), Dobler et al.
patent: 4574749 (1986-03-01), Negre
patent: 4766857 (1988-08-01), Laine et al.
Patent Abstracts of Japan vol. 7, No. 124 (M-218) (1269) 28 May 1983, & JP-A-58-39863 (Yamaha Hatsudoki KK) 8 Mar. 1983 *whole document*.
Patent Abstracts of Japan vol. 3, No. 39 (M-54) Mar. 31, 1979, & JP-A-54 13806 (Fuji Jukogyo KK) 2 Jan. 1979, *whole document*.
Patent Abstracts of Japan vol. 12 No. 286 (M-727) (3133) 5 Aug. 1988, & JP-A-63 62932 (Yamaha Motor Co. Ltd.) 19 Mar. 1988, *whole document*.

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