Harvesters – Motorized harvester – With selective control of drive means
Patent
1979-05-25
1980-09-09
Hirsch, Paul J.
Harvesters
Motorized harvester
With selective control of drive means
56 105, 188 1A, 192 17R, A01D 6910, A01D 7518, F16D 6602
Patent
active
042211085
ABSTRACT:
A control system for a rotary type lawnmower having a cutter blade housing supporting an engine and having a handle extending upwardly for manipulation by an operator, the control system including a clutch between the motor shaft and the blade, the clutch being of the centrifugal type and having an external drum surface, a brake caliper assembly having two legs pivoted together near their centers and supported at the pivot by the housing, the inner portions of the legs clamping as a brake on said external drum surface and the outer portions of the legs supporting a spring operative in a direction to urge the inner legs to clamp toward each other, and a manual control including linkages coupled to the throttle and to the outer legs and operative when the control is manually actuated to advance the throttle and unclamp the brake, and when released to return the engine to idle and clamp the brake, contacts being provided on the legs to short-circuit the engine ignition when the brakes become excessively worn.
REFERENCES:
patent: 3026665 (1962-03-01), Hoff
patent: 3228177 (1966-01-01), Coaties
patent: 3253391 (1966-05-01), Meldahl
patent: 3955653 (1976-05-01), Comer
patent: 4035994 (1977-07-01), Hoff
patent: 4044533 (1977-08-01), Wick
patent: 4122652 (1978-10-01), Holtermann
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