Endless belt power transmission systems or components – Pulley with belt-receiving groove formed by drive faces on... – With spring device
Patent
1990-07-23
1991-07-23
Bui, Thuy M.
Endless belt power transmission systems or components
Pulley with belt-receiving groove formed by drive faces on...
With spring device
F16H 5532
Patent
active
050339907
ABSTRACT:
A pulley having a spring loaded release mechanism is disclosed which provides a safety override under high torque conditions. The pulley is provided with a first flange which rotates in the conventional manner with a central hub. A second flange is rotatably mounted on the central hub relative to the first flange and a bushing is disposed between the two flanges and may rotate relative to both. A resilient member urges the three elements together under normal operating conditions. The resilient member is preset to allow a certain amount of force on the second flange, relative to its speed. When this torque is surpassed by a belt mounted between the two flanges, the second flange and the bushing separate from the first flange to allow the belt to continue to spin on the bushing and a second flange, relative to the first flange. When the torque of the belt on the second flange returns to a level below that preset by the resilient member, the two flanges once again are urged together by the resilient member and the pulley resumes normal operation.
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Bui Thuy M.
Friedman Barry I.
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