Synchromesh gear
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United States of America Patent
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Jun 24, 1980
Grant Date -
N/A
app pub date -
Feb 21, 1979
filing date -
Mar 14, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A synchromesh gear for a speed-change gear drive including a conically-shaped friction surface in the form of sharp-edged teeth each supporting a friction surface, which are separated from each other by oil evacuating grooves, and which is adapted for frictional mating engagement with a smooth opposite or counter cone. The teeth are arranged obliquely in the friction surface at an angle with the range of between 10.degree. and 70.degree., and preferably about 30.degree., with respect to the direction of the generatrix of the conically-shaped friction surface. The profiles of the teeth may consist of two regions having different profile slopes, in which the region of the tooth crown evidences the steeper profile slope. The oil removal or evacuation grooves and teeth can be located on the outer surface of the synchromesh gear, as well as on its interior surface. The teeth can also be distributed either uniformly over the entire interior surface of the gear ring or also arranged discontinuously.
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