F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
341/66
F16D 7/02 (2006.01) B66D 1/14 (2006.01) F16H 35/10 (2006.01) F16H 59/46 (2006.01) G01P 3/60 (2006.01)
Patent
CA 1225724
ABSTRACT OF THE DISCLOSURE Apparatus for protection against damage from excessive torque loads, including a fast-acting slip clutch to limit torque transmitted between a drive motor and a mechanical load, and an automatic device to protect the slip clutch from damage due to slippage in excess of a predetermined amount for a predetermined time. A slip measurement device detects the degree of slippage in the clutch, and a timing circuit coupled to the slip measure- ment device disconnects power from the drive motor after the predetermined time has elapsed. In the illustrative embodiment of the invention, the slip clutch includes an input shaft, a wrapped spring in interference-fit engagement with the input shaft, and an output shaft in engagement with one end of the spring. The spring tends to unwrap from the input shaft and to slip if a torque in excess of a threshold level is transmitted.
465038
Hallidy William M.
Shutt Donald P.
Gowling Lafleur Henderson Llp
Western Gear Corporation
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