Machine crank-shaft with improved dynamic balance ratio

Details Machine crank-shaft with improved dynamic balance ratio Machine crank-shaft with improved dynamic balance ratio

1975-05-12

1977-01-11

Wyche, Benjamin W.

Machine element or mechanism

Elements

Cranks and wrist pins

74603, F16F 1510

Patent

active

040020878

ABSTRACT:
A balanced multiple-throw crank-shaft wherein the free forces of the first and second orders forming resultants for the whole crank-shaft of the forces produced by each coupling are substantially zero and at least some of the crank-throws are shifted or offset angularly, respectively, by such a small angle in one direction of rotation and by such an amount relative to the corresponding circumferentially uniformly distributed angular positions they would assume in a configuration with angularly equally spaced crank-throws in orthogonal projection on a plane perpendicular to the geometrical spin axis of rotation of said crank-shaft that an improved balancing ratio will result therefrom.

REFERENCES:
patent: 2680427 (1954-06-01), Summers
patent: 3039447 (1962-06-01), Lang
patent: 3161079 (1964-12-01), Okamura et al.

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