Patent ID: 6397993
Filing Date: 2002-06-04
Classification: B30B

Abstract:
An oil shear clutch/brake unit comprising:a stationary support member defining an oil supply port; a rotating input member rotatably supported with respect to said stationary member; a rotation output member rotatably supported with respect to said stationary support member and said rotating input member; a selectively operable brake for prohibiting rotation of said output member with respect to said stationary support member, said brake including a brake hub secured to said output member; a selectively operable clutch for prohibiting rotation of said output member with respect to said rotating input member, said clutch including a clutch hub secured to said output member, said clutch hub being positioned axially along said output member from said brake hub, said output member defining a first lubricant passage for providing lubricant directly to said selectively operable clutch from said oil supply port; a piston disposed between said brake and said clutch, said piston being movable between a first position where said brake is applied and said clutch is disengaged and a second position where said brake is released and said clutch is engaged; a biasing member for urging said piston into said first position; and a hydraulic fluid chamber disposed adjacent said piston, said hydraulic fluid chamber adapted to receive a pressurized hydraulic fluid to move said piston to said second position.