Clutch brake mechanism for lawnmowers

Harvesters – Motorized harvester – With condition-responsive operation

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Details

56 113, 56 118, 188 77W, 192 12BA, A01D 7518, A01D 6910, H02G 1100

Patent

active

040559351

ABSTRACT:
A lawnmower has an improved clutch-brake mechanism interposed between the engine drive shaft and the rotating blade to stop the blade except when an operator tensions a control cable. The clutch-brake includes cylindrical input and output members selectively drivingly coupled by a clutch spring wound around both members. A control sleeve positioned around the clutch spring connects with the input end of the clutch spring. When the control sleeve is braked, the clutch spring releases its grip on the input member and the output is no longer driven. A coiled brake band extends around the control sleeve to selectively effect this braking action. An improved floating mount is provided for the brake band. An improved lost-motion connection is provided between the control sleeve and the output member to limit the twisting of the clutch spring. An optional slip clutch is provided for connecting the output member to the blade.

REFERENCES:
patent: 2951568 (1960-09-01), Hungerford, Jr. et al.
patent: 2985992 (1961-05-01), Dowdle
patent: 3196637 (1965-07-01), Orr
patent: 3373851 (1968-03-01), Baer
patent: 3378123 (1968-04-01), Papa, Jr.
patent: 3414094 (1968-12-01), Hauser
patent: 3425526 (1969-02-01), Baer
patent: 3698523 (1972-10-01), Bellinger
patent: 3837450 (1974-09-01), Malion et al.

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