Self-energizing Patents (Class 188/70B)
  • Patent number: 5501303
    Abstract: A brake system is provided that applies braking forces on surfaces in both the translational and rotational directions using a single acting self-contained actuator that travels with the translational mechanism. The brake engages a mechanical lock and creates a frictional force on the translational structure preventing translation while simultaneously creating a frictional torque that prevents rotation of the vertical support. The system may include serrations on the braking surfaces to provide increased braking forces.
    Type: Grant
    Filed: July 21, 1995
    Date of Patent: March 26, 1996
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Johnny W. Allred, Vincent J. Fleck, Jr.
  • Patent number: 5482512
    Abstract: An electro-mechanical hybrid powertrain uses the electric motor during engine starting. A planetary gear arrangement is disposed in torque transmitting relation between the prime mover, the electric motor and the transmission output. A pair of brake members, which are self-engaging, are provided to establish reaction members in the planetary gear arrangement during engine starting. A fluid-operated piston selectively enforces disengagement of the brakes after the engine has started.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: January 9, 1996
    Assignee: General Motors Corporation
    Inventor: Paul D. Stevenson
  • Patent number: 5277278
    Abstract: An escalator is provided with a caliper disc brake for stopping movement of the steps in cases of emergency. The disc is mounted on the main drive sprocket shaft, and the caliper is normally held away from the disc. When power is removed from the drive, the caliper is set on the disc to stop further movement of the steps. The braking torque of the brake assembly is adjustable to allow use of one basic assembly with escalators having different rises. The adjustment is accomplished by moving the center of gravity of the brake pads toward or away from the pivot axis of the brake lever. The brake can also be finely tuned at installation to provide an optimum stopping distance and time so that a too abrupt stop is avoided.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: January 11, 1994
    Assignee: Otis Elevator Company
    Inventors: Martin Mehlert, Wolfgang Michalik
  • Patent number: 5263554
    Abstract: The invention relates to a disc-brake motor subassembly comprising at least one piston (10), which can be controlled by a mechanical subassembly having first and second plates (40, 48), one of which is actuated in rotation, these two plates bearing mutually faced indentations (54, 56) in which is accommodated at least one ball (52), the indentations being provided in the axial direction of the plates with a slope which allows the conversion of the rotation of a first plate into axial displacement of the second plate in order to control the piston (10). According to the invention, in the course of the rotation the ball (52) follows a trajectory, the distance of each of the points of which from the axis of the plates (40, 48) is variable.
    Type: Grant
    Filed: May 11, 1992
    Date of Patent: November 23, 1993
    Assignee: Bendix Europe Services Techniques
    Inventor: Jean-Claude Mery
  • Patent number: 5074387
    Abstract: By combining the braking actions of a drum brake system with and a disc brake system in each wheel that is used for braking of a motor vehicle or trailer, so that the braking actions are at some angle to each other, the over-all braking effect and efficiency are significantly improved.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: December 24, 1991
    Inventor: Carl Antonelli
  • Patent number: 4838391
    Abstract: A device which brakes a drive motor having a rotor adapted to be axially displaced when the motor winding is de-energized. A braking member moves with the rotor so that when the motor winding is deenergized, the circumferential surface of the braking member engages the stationary member to frictionally stop the rotation of the rotor. When the braking member engages the stationary member, the exterior circumferential surface thereof pivots to position substantially the entire surface of the exterior circumferential surface in contact with the stationary member. Energization of the motor moves the braking member with the rotor away from the stationary member and the exterior surface of the braking member pivots to disengage from the stationary member enabling the rotor to rotate.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: June 13, 1989
    Assignee: Xerox Corporation
    Inventor: Richard C. Schenk
  • Patent number: 4653614
    Abstract: In a self-energizing disc brake of the spreading type the recesses in the pressure plates in which the balls are housed, are machined directly into the material of the plates on pitch circles in the two plates of corresponding diameters. Each recess comprises an inclined ramp surface terminating at opposite ends in first and second end portions of which the end portion at the deeper end is engaged by the ball in an "off" position of brake, and the second portion is engaged by the ball to preclude further relative angular movement between the plates in brake-applying direction, thereby indicating a "wear stop". In addition ramp surfaces of different slopes may be located between the end portions so that an increased brake-applying effort towards a fully worn lining condition provides a wear warning device.
    Type: Grant
    Filed: August 15, 1985
    Date of Patent: March 31, 1987
    Assignee: Lucas Industries Public Limited Company
    Inventors: Anthony G. Price, David Parry, Roy Campbell