Patents by Inventor Bradley W. Mosman

Bradley W. Mosman 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).

  • Back seat rising stem gate valve
    Patent number: 5908046
    Abstract: A back seat rising stem gate valve has a valve body with a flow passageway through it and an open top, a gate that is vertically positioned to open and close the passageway, a stem extending upwardly from the valve body, the lower end of the stem being attached to the gate, a bonnet secured to the valve body by which the valve body open top is closed, the stem extending through an opening in the bonnet, a packing box slidably positioned in an opening in the bonnet and receiving the stem, the packing box having a back seat circumferential sealing surface surrounding the valve stem, and the valve stem having an integral enlarged diameter shoulder so that when the stem is in the full upward position the packing box can be displaced downwardly forcing the back seat sealing surface to seal against the stem shoulder to seal against fluid leakage along the valve stem. In one embodiment the packing box is downwardly displaced by hydraulic pressure, such as hydraulic pressure supplied from within the valve body.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: June 1, 1999
    Assignee: ERC Industries, Inc.
    Inventor: Bradley W. Mosman
  • Valve having provision for replacing stem packing while the valve is under pressure
    Patent number: 5743288
    Abstract: A valve, having provision for replacing stem packing while the valve is under pressure, has a valve body with a flow passageway through it, a gate that is vertically positioned to open and close the passageway, a stem extending upwardly from the valve body, the lower end being attached to the gate, a bonnet secured to the valve body by which the valve body open top is closed, the stem extending through an opening in the bonnet, a packing box slidably positioned in an opening in the top of the bonnet and receiving the stem, a back seat ring is positioned within the opening of the bonnet below the packing box and having a circumferential sealing surface surrounding the valve stem, the valve stem having an integral enlarged diameter shoulder so that when the stem is in the full upward position the packing box can be moved downwardly in the direction towards valve body forcing the back seat ring sealing surface to seal against the stem shoulder formed on the valve stem to permit packing retained within the packin
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: April 28, 1998
    Assignee: ERC Industries, Inc.
    Inventors: Bradley W. Mosman, Frederick A. Hausler, III