Friction drive unit for riding lawn mowers and the like

Details Friction drive unit for riding lawn mowers and the like Friction drive unit for riding lawn mowers and the like

1994-05-17

1996-03-05

Herrmann, Allan D.

Friction gear transmission systems or components

Forward and reverse

Variable speed in forward or reverse

74721, 180 62, 180 666, 476 56, F16H 1520, B62D 1112

Patent

active

054962269

ABSTRACT:
A variable speed friction drive apparatus for a lawn mower includes a pair of drive cones supported by a frame for rotational movement about a common first axis, and a pair of drums supported by carriages for rotation about axes transverse to the lengths of the carriages. Each carriage is supported on the frame for movement between a neutral position in which the associated drum is disengaged from either of the cones and a plurality of driving positions in which the drum engages either of the cones. A universal joint connects the rear end of each carriage to the frame for universal pivotal movement about the joint, and both ends of each carriage are independently biased toward the neutral position.

REFERENCES:
patent: 3306132 (1967-02-01), Davis
patent: 3410156 (1968-11-01), Davis
patent: 3448818 (1969-06-01), Davis
patent: 3479891 (1969-11-01), Moore
patent: 3570316 (1971-03-01), Hornack et al.
patent: 3738186 (1973-06-01), Deese
patent: 4625586 (1986-12-01), Splittstoesser

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