B - Operations – Transporting – 66 – B
Patent
B - Operations, Transporting
66
B
188/4
B66B 25/00 (2006.01) F16D 55/38 (2006.01) F16D 55/40 (2006.01) F16D 59/02 (2006.01) F16D 65/14 (2006.01) F16D 65/853 (2006.01) F16D 55/00 (2006.01) F16D 65/78 (2006.01)
Patent
CA 1229803
A B S T R A C T A disc brake unit comprises a disc assembly of interleaved rotor discs and stator discs that are normally spring biased to a brake engaged condition. A hydraulically operated first piston engages a stator disc at one end of the unit to move it axially in opposition to the string bits to release the pressure between the discs and thus release the brake. second piston engages a stator disc at the opposite end of the unit for moving the rotor and stator discs on one side of a stop means into engagement with each other and applies a modulated force to said rotor and stator discs while the first power piston is in position to oppose the spring bias, to thereby apply slip braking torque to the output shaft.
462270
Collins Marcus H.
Petkash Robert P.
Borden Ladner Gervais Llp
Corporation Eaton
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