Patents by Inventor Robert C. Still

Robert C. Still has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Removable operator for gate valves
    Patent number: 4231389
    Abstract: A pedestal extends upwardly from the body of a gate valve housing in a straddling relationship to the gate. An operator, detachably attachable to the pedestal, includes a hand wheel operating through a pinion gear to impart translatory movement to a vertically oriented rack. A clevis is disposed at the lower extremity of the rack for attachment through a pin to the upper end of the gate. A removable pin is employed to secure the gate, in either a raised or a lowered position, to the pedestal and to maintain the gate in position after removal of the operator.
    Type: Grant
    Filed: September 15, 1978
    Date of Patent: November 4, 1980
    Assignee: New Concepts, Inc.
    Inventors: Robert C. Still, Frank J. Huppenthal, Barbara J. Smith, Gerald H. Scotney
  • Replaceable one piece liner for a gate valve
    Patent number: 4112969
    Abstract: A replaceable one piece bore and chest liner is enclosed within a pair of mirror image castings to define a gate valve. A cast gate, enveloped within molded material, cooperates with the liner to open and close the gate valve.
    Type: Grant
    Filed: November 22, 1976
    Date of Patent: September 12, 1978
    Assignee: New Concepts, Inc.
    Inventor: Robert C. Still
  • Gate valve with replaceable liner
    Patent number: 4051863
    Abstract: A gate valve having a replaceable one piece bore and chest liner enclosed within a pair of mirror image castings is disclosed. The gate is cast and enveloped within molded material to cooperate with the liner in a sealing relationship.
    Type: Grant
    Filed: August 23, 1976
    Date of Patent: October 4, 1977
    Assignee: New Concepts, Inc.
    Inventor: Robert C. Still
  • Biasable seal for gate valves
    Patent number: 4026517
    Abstract: A selectively biased seal for a gate, which gate is translatable within a one piece liner of a gate valve, is disclosed. Lever means for operating the gate and oriented with or normal to the direction of flow through the gate valve are also described.
    Type: Grant
    Filed: March 17, 1976
    Date of Patent: May 31, 1977
    Assignee: New Concepts, Inc.
    Inventor: Robert C. Still
  • Gate valve with replaceable liner
    Patent number: 3993092
    Abstract: A gate valve having a replaceable one piece bore and chest liner enclosed within a pair of mirror image castings is disclosed. The gate is cast and enveloped within molded material to cooperate with the liner in a sealing relationship.
    Type: Grant
    Filed: September 17, 1975
    Date of Patent: November 23, 1976
    Assignee: New Concepts, Inc.
    Inventor: Robert C. Still