Draft Gear Patents (Class 267/115)
  • Patent number: 9416570
    Abstract: A spring strut assembly comprises a cylinder having a wall defining an interior volume comprising a working end and a boosting chamber; the working end including a first volume and the boosting chamber including a second volume of gas. A piston assembly is disposed for reciprocation in the working end of the interior volume. A piston rod has a proximal end secured to the piston and a distal end projecting out of a first end of the cylinder. A temperature control valve assembly is disposed in the interior volume separating the working end from the boosting chamber and a shock absorbing assembly is disposed in the interior volume between the piston assembly and the first end of the cylinder, and is compressible by the piston assembly when the temperature control valve is dislodged by pressure in the boosting chamber thereby driving the piston assembly into the shock absorbing member.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: August 16, 2016
    Inventors: Joel Colombo, Michael P. Balogh, Graham S. Foulkes
  • Patent number: 6669180
    Abstract: The gas-hydraulic shock absorber assembly comprises a sleeve member and a ram member movable relative to the sleeve member. In the interior of the ram member, a gas chamber is provided that is pressurized by means of a gas. In the interior of the sleeve member, an oil chamber is provided that is filled with a hydraulic medium and which decreases in volume the more the ram member is moved relative to the sleeve member. Between the two chambers, a gas-hydraulic control assembly is provided. Upstream of the control assembly, there is a bleeding assembly, comprising a transfer channel opening into a portion of the oil chamber remote from the control assembly. Further provided is a bleeding channel, opening into an upper portion of the oil chamber and connecting the transfer channel to the control assembly when the shock absorber assembly is at rest. The bleeding assembly comprises several channels connecting the oil chamber to the control assembly and comprising each a V-shaped valve flap to close the channels.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: December 30, 2003
    Assignee: Schwab Verkehrstechnik AG
    Inventor: Otto Ziegler