Patents Assigned to Emerald Rail Technologies, LLC
  • Railcar cushion device preload valving systems
    Patent number: 5871109
    Abstract: A pressure relief valving system for a rail car cushion device including several preload valves mounted in the cylinder wall of the cushion device each having both spring biasing and hydraulic biasing applied to retain a valve piston against a seat until a preload pressure is reached, and each preload valve capable of transitioning from a closed mode to an open mode at a preset preload pressure.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: February 16, 1999
    Assignee: Emerald Rail Technologies, LLC
    Inventor: Glen L. Litten
  • Cargo handling hydraulic ramp loader system and methods
    Patent number: 5829947
    Abstract: A hydraulic ramp loader, track channel systems and methods for lifting, leveling, aligning, moving loading and unloading cargo on channel-dolly-pallets into a carrier equipped with a like track channel system, the ramp loader having a lifting hydraulic cylinder, a leveling hydraulic cylinder, a control means and an extendible and expandable interlocking track channel frame ramp.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: November 3, 1998
    Assignee: Emerald Rail Technologies, LLC
    Inventor: Glen L. Litten
  • Railcar cushion device valving systems
    Patent number: 5826735
    Abstract: A valving system for a rail car cushion device including several pressure control relief sequence valves (PCRS) mounted in the cylinder wall of the cushion device each having hydraulic biasing applied to retain a valve piston against a seat until a preload pressure is reached, with one or more optional spike control (SC) valves mounted in a cushion device piston head.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: October 27, 1998
    Assignee: Emerald Rail Technologies, LLC
    Inventor: Glen L. Litten