Patent ID: 6186291
Filing Date: 2001-02-13
Classification: F16D

Abstract:
A braking mechanism for selectively braking a working motor performing an operating function on heavy equipment, said motor having a drive shaft that is selectively rotatably driven and not driven as the motor is started and stopped, the drive shaft protruding through a housing component and exposed for application by a braking mechanism which comprises:a rotor fixedly attached to the drive shaft protruded through the housing;a brake shoe mounted on each side of the rotor and each brake shoe slidably movable toward and away from the rotor, a pad portion on each shoe engaging and disengaging the rotor;a plunger mechanism for each shoe positioned on the side of the shoe opposite the brake pad, said plunger mechanism of each shoe comprising a piston and a spring urging the piston toward the shoe for engagement of the pad with the rotor, and an expandable chamber provided in said plunger mechanism and a media source connected to the chamber, a media control for selectively pressurizing the chamber with media from said media source for expanding the chamber and thereby urging retraction of the piston; andsaid media control including a switch and control circuitry therefor that initiates cooperative and independent sequencing engagement, disengagement of the brake shoes with the start and stop functions of the motor.