Components Having Frictional Contact Surface Patents (Class 254/319)
  • Patent number: 8448922
    Abstract: A safety brake device for a theatre hoist to prevent the uncontrolled release of a load that is suspended above or below people includes an overrunning clutch and a torque disc. The torque disc only rotates with the overrunning clutch when the load is lowered, but must overcome friction forces applied to the surface of the torque disc to do so. The friction forces are constantly applied to the torque disc by maintaining friction material in contact with the torque disc. The friction material is a non-asbestos, non-metallic composite saturated with a lubricant.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: May 28, 2013
    Assignee: The Rowland Company
    Inventor: Robert Z. Gartrell, III
  • Patent number: 7896315
    Abstract: A control and regulation arrangement for protection of a conveyor or other hoisting or crane device that assures a safe reaction to overloading. A brake apparatus is provided that acts on the conveyor under control of an overload sensor. If the load approaches a predetermined threshold, a signal is emitted from the overload sensor and transmitted to a speed sensor that limits the conveyor speed. Simultaneously the control transmits a signal to the brake apparatus to actuate and stop the conveyor. Upon receipt of a subsequent signal that a load relief state is to be established, the control brakes the conveyor in accord with the speed signal such that the object in transport moves toward a safe position at a constant speed. A conveyor with multiple hoisting devices may include duplicate control and regulation arrangements for each hoisting device.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: March 1, 2011
    Assignee: Pintsch Bubenzer GmbH
    Inventor: Dirk Faust
  • Patent number: 7866633
    Abstract: The invention relates to an electromagnetically ventilating spring-pressure brake for mounting on the driving disk (15) or the driving disk shaft (16) of already existing elevators, which are operated with cables passing over a driving disk. The external-mounted brake (1) is situated concentric to the central axis of the driving disk (15) or driving disk shaft (16) on a separate base (23) of the structure on the free side (i.e. opposite the driving side) of the driving disk (15) and is fastened in a stationary and rotationally fixed manner. The rotor (5) of the brake (1) is connected in an essentially rotationally fixed manner to the free end of the driving disk (15) or of the driving disk shaft (16) in order to transmit the braking torque of the external-mounted brake to the driving disk (15).
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: January 11, 2011
    Assignee: Chr. Mayr GmbH & Co. KG
    Inventors: Harald Weiss, Herbert Vogt, Christoph Dropmann, Josef Eisenburger
  • Patent number: 5388781
    Abstract: A method and apparatus for pulling cables has a subassembly including a cooperatively driven pulling line take-up spool and level winding device. The subassembly is utilized in combination with a capstan with the take-up spool, level winding device and capstan optionally driven jointly by the same drive. The motor drive is coupled to a motor drive shaft upon which the take-up spool is frictionally mounted. The motor drive shaft in turn is coupled separately to both a level winding device drive shaft and a capstan drive shaft to provide the cooperative drive. The assembly optionally includes a means for preventing spillage of the pulling line from the take-up spool when the motor is inoperative or reverse driven. The assembly, or sub-parts thereof are mounted on a tiltable table which permits pulling from various angles.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: February 14, 1995
    Inventor: Charles J. Sauber
  • Patent number: 4372535
    Abstract: A capstan winch for pulling cable through conduit includes means for measuring the torque applied to the capstan and a take-up reel. The torque measuring means comprises an inner drum connected by a tension spring to a concentric outer drum. A patterned disc on the inner drum is visible through a window in the outer drum. The pattern indicates the relative position of the inner and outer drums, which is correlated to the applied torque.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: February 8, 1983
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: David W. Gibson, Albert L. Hale, Daniel L. Pope, Donald R. Rutledge, Kirk P. Wells