Central Friction Post Patents (Class 213/35)
  • Patent number: 7311215
    Abstract: A draft gear assembly including a housing having an open front and closed rear portions. A compressible cushioning element is positioned within the rear portion with a seating arrangement abutting one end thereof adjacent the open front portion. A friction cushioning element is provided in the open front portion of the housing. A spring release mechanism continuously urges the friction cushioning element outwardly from the compressible cushioning element thereby releasing such friction cushioning element after compression of such draft gear assembly. A compressible cushioning element includes a hydraulic cylinder having a slidable piston to define a high pressure chamber and a low pressure chamber.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: December 25, 2007
    Assignee: WABTEC Holding Corp.
    Inventor: Howard Sommerfeld
  • Patent number: 6923331
    Abstract: A friction-type draft gear assembly includes a housing having an open front and closed rear portions. A compressible cushioning element is positioned within the rear portion with a seating arrangement abutting one end thereof adjacent the open front portion. A friction cushioning element is provided in the open front portion of the housing. A spring release mechanism is adapted for continuously urging the friction cushioning element outwardly from the compressible cushioning element thereby releasing such friction cushioning element after compression of such draft gear assembly. A compressible cushioning element includes a hydraulic cylinder having a slidable piston to define a high pressure chamber and a low pressure chamber. A metering pin disposed within the piston has aworking portion of a decreased diameter for increasing shock absorbing capacity of such draft gear assembly.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: August 2, 2005
    Assignee: Westinghouse Air Brake Technologies Corporation
    Inventor: Howard Sommerfeld