Fluid Pressure Patents (Class 188/151R)
  • Patent number: 6082509
    Abstract: Disclosed herein is an improved braking system. The braking system includes a valving arrangement which reduces the dead band of the system and the freedom to randomly select the pistons return position. In particular, the system includes a fluid reservoir, a piston located in a cylinder including a reservoir port, a first fluid channel connecting the reservoir to the reservoir port, a brake actuator, and a second fluid channel connecting the cylinder to the brake actuator. The piston is moveable within the cylinder to produce fluid flow within the first channel. A first valve is disposed between the reservoir and the cylinder to prevent fluid flow from the cylinder to the reservoir when the piston is moved to pressurize fluid in the second fluid channel.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: July 4, 2000
    Assignee: Hayes Brake, Inc.
    Inventor: James A. Buckley
  • Patent number: 5915506
    Abstract: An emergency stop module for a robot or the like, of the type comprising a ody (1) forming a compression chamber (3) and fed with air under pressure, provided with an opening (5) which is normally closed by an inner plate (6) firmly attached to an outer flange (7), the body (1) and the outer flange (7) being firmly attached to two elements respectively of the robot, characterized by the fact that it is provided with an automatic resetting device formed of a piston-cylinder unit (14-16) arranged in the flange (7) and the rod (17) of which passes through the inner plate (6) to rest against the bottom (2) of the body (1).
    Type: Grant
    Filed: December 3, 1996
    Date of Patent: June 29, 1999
    Assignee: Comptoir Commercial de Mecanique et d'Outillage de Precision CCMOP
    Inventor: Daniel Y. Farina
  • Patent number: 5746293
    Abstract: A pneumatic/hydraulic pressure intensifier has a cap secured to open end of housing. A first chamber in open end receives air pressure. A first fluid communication system formed in cap communicates air pressure to first chamber. A wall member is disposed in such housing. A second chamber in communication with first chamber contains hydraulic fluid and unpressurized air. A second cap is secured to other end of housing. A third chamber in intensifier contains hydraulic fluid. A second fluid communication system formed in second cap connects the third chamber to a fluid communication line. An aperture formed in wall of second chamber evacuates air from portion of first and second chambers upon communication of air to a second portion of first chamber and communication of air to the first and second chambers upon evacuation of air pressure. A second aperture, formed in another housing wall, communicates hydraulic fluid to second chamber. A first piston is disposed for reciprocal movement in the first chamber.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: May 5, 1998
    Assignee: Westinghouse Air Brake Company
    Inventor: Thomas H. Engle
  • Patent number: 5072651
    Abstract: A direct drive type rotation dividing table includes a dividing table mounted on an output shaft of a rotor which is accommodated in a housing together with a stator. A clamp mechanism for maintaining the dividing table at a stopped position includes a cylinder slidably disposed in the housing in an axial direction and having a radially extending plane portion and a friction surface adapted to contact the output shaft, an elastic member having one end connected to the housing and urging the friction surface of the cylinder to move away from the output shaft, and a piston having an elastically deformable thin plane portion opposing the plane portion of the cylinder and having one side fixed to the housing and the other free end slidable on the inner surface of the slider. The piston has a friction surface which is adapted to contact a backside of the dividing table.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: December 17, 1991
    Assignee: Nippon Seiko Kabushiki Kaisha
    Inventor: Kazuhiro Kagita
  • Patent number: 4923056
    Abstract: The invention is directed to a method of increasing and/or extending the operational service life of an aircraft brake disk stack by selectively limiting the number of brake assemblies which comprise the aircraft landing gear configuration and which are put into operation during the time the aircraft is on the ground and subject to taxi-snub braking cycles while also providing that all of the brake assemblies of the total available on the aircraft are operational during landing of the aircraft.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: May 8, 1990
    Assignee: Aircraft Braking Systems Corporation
    Inventor: John Nedelk
  • Patent number: 4892121
    Abstract: A braking assembly for use on loom shuttle boxes is provided extending inwardly of at least one wall of the shuttle cell and includes a support member attachable to the shuttle cell wall, a shuttle engaging member having at least one surface for engaging a shuttle entering the cell and at least one inflatable bladder interposed between the support member and the shuttle engaging member for urging the shuttle engaging member inwardly of the cell upon inflation of the bladder into a position interfering with movement of the shuttle within the cell. The assembly further includes apparatus for urging the bladder to a deflated condition to move the shuttle engaging member away from engagement of the shuttle when the bladder is deflated.
    Type: Grant
    Filed: July 14, 1988
    Date of Patent: January 9, 1990
    Assignee: Niagara Lockport Industries Inc.
    Inventor: Charles M. Brown
  • Patent number: 4787494
    Abstract: A hydraulic operating unit for the friction engaging apparatus of a transmission provides a hydraulic operating unit which permits the introduction of a low-pressure working fluid to permit the forceable disengagement of the hydraulic operation unit to work against the fluid which would normally urge the unit into engagement. The effective pressure-receiving area on the releasing side of a hydraulic power servo mechanism is made sufficiently large with respect to the effective pressure-receiving area on the engaging side of the servo mechanism while the piston diameter is kept small in order to save space in the construction of the servo mechanism while at the same time permitting the device to effectively disengage the friction mechanism.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: November 29, 1988
    Assignees: Aisin Seiki Kabushiki Kaisha, Aisin Warner Kabushiki Kaisha
    Inventors: Tsunehiko Ogasawara, Koji Sumiya
  • Patent number: 4696377
    Abstract: A brake system for a drawworks includes a hydraulically actuated band brake system having a backup spring actuator for emergency stops. The system also includes a caliper disc brake system for emergency stops. The disc brake system includes a rotor directly mounted to the drum barrel and a pair of spring actuated caliper assemblies.
    Type: Grant
    Filed: September 27, 1985
    Date of Patent: September 29, 1987
    Assignee: LTV Energy Products Company
    Inventors: Eugene M. Richardson, Norbert O. Brehm, Larry G. Null
  • Patent number: 4692362
    Abstract: The two halves of a split annular inflatable brake are formed by laying up a number of flat rubber body plies and interleaved end patches which extend longitudinally beyond the ends of the body plies. The sides of the body plies, some of which are fabric reinforced, are successively folded over each other and stitched to form a multi-layered flattened tubular body. The end patches are folded in turn over the ends of the flattened tubular body, and in the case of fabric reinforced patches, are pinched and trimmed along the side edges of the flattened tubular body. Unreinforced end patches are cut inward from the sides to form a center flap which is folded down against the sides of the flattened tubular body and side flaps, one of which is removed, and the other of which is pulled circumferentially around the tubular body over the folded center flap. The split air brake is built up on an arcuate mold half and then the remaining mold parts are assembled around the built up part for curing.
    Type: Grant
    Filed: March 25, 1986
    Date of Patent: September 8, 1987
    Assignee: McCreary Industrial Products Co.
    Inventor: James L. Johnson
  • Patent number: 4572319
    Abstract: The invention provides a parking brake system for automotive or delivery type vehicles, golf carts, etc. that applies the emergency or parking brake automatically after the engine is turned off or if other pre-determined conditions are met, such as, but not limited to, the driver leaving the seat or hydraulic brake failure.Several other pre-determined conditions can be integrated into the system to stop or retard the release of the parking brake such as door not properly closed, seat belt not properly in use, etc.An electronic time delay pack can be incorporated with a seat switch to allow for driver bounce on rough terrain.A one-way check valve is connected between the intake manifold and the actuator. This check valve opens fully when the engine is running and allows the vacuum to compress the actuator and release the parking brake. The check valve closes when the engine is turned off and the check valve retards the sudden return of atmospheric pressure to the actuator, thus preventing lock-up at speed.
    Type: Grant
    Filed: October 3, 1984
    Date of Patent: February 25, 1986
    Assignee: Fail Safe Brake Corporation
    Inventor: William G. Fontaine
  • Patent number: 4505362
    Abstract: Multiple shocks of a vertically falling mass against a target member coupled with the earth are prevented by holding the mass and retaining it above the target member after its first bounce. This retention is accomplished by means of deformable elements laterally pressed against the mass body by jack rods actuated in response to a control signal produced by a sensor at the moment of the first impact of the mass.
    Type: Grant
    Filed: July 2, 1982
    Date of Patent: March 19, 1985
    Assignee: Institut Francais du Petrole
    Inventors: Pierre-Claude Layotte, Jean-Claude Dubois, Andre James