Pulleys
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United States of America Patent
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-
May 29, 1990
Grant Date -
N/A
app pub date -
Aug 18, 1988
filing date -
Aug 18, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pulley with plural fillets disposed on an outer peripheral surface thereof, which includes a plurality of recesses for lightening the weight thereof. The recesses are circumferentially formed in an inner cylindrical surface of a ring-shaped rim at equal angular intervals about an axis of the rim. Each of the recesses is disposed at a position of the inner surface of the rim opposite that of the fillet. The pulley can be cheaply manufactured to be lightweight without reducing the mechanical strength thereof, and thereby can be exactly rotated at a high speed without vibrating and creating noise even if its center of gravity is displaced from its axis. Therefore, the pulley is adapted to be used for power transmission in an automobile.
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