Machine element or mechanism – Gearing – Toothed gear and recirculated unconnected elements
Patent
1977-04-27
1979-01-02
Scott, Samuel
Machine element or mechanism
Gearing
Toothed gear and recirculated unconnected elements
180 75, 56 118, F16H 5556, F16H 5536
Patent
active
041321219
ABSTRACT:
A variable speed drive for a riding lawn mower or the like has a double pulley variable speed sheave assembly coupled between a driving pulley and a driven pulley by first and second V-belts, respectively. A mechanical control linkage is operable to shift the sheave assembly along the cam profile of a cam arm from a stopped position with both belts declutched to a range of low to high speed positions with the belts drivingly engaged. Said control linkage is springably biased to urge the sheave assembly toward the stopped position. The cam arm is also springably biased generally away from the driving and driven pulleys to maintain the belts under driving tension throughout the range of low to high speed positions in a manner such that belt tension varies with variations in operating speed.
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Henderson William R.
Scott Samuel
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