Patents by Inventor Venkatesh R

Venkatesh R 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).

  • Patent number: 5236345
    Abstract: An expanding gate valve assembly comprising a gate, a stem for actuating the gate and floating segments movably mounted on opposite sides of the gate for movement relative to valve seats on a valve body. The valve seats on the valve body are inclined to the axis of the stem, and the segments are provided with correspondingly matching inclined surfaces. Movement of the segments is arrested by stops on the valve body, thereby making the segments expand laterally during closure The gate has a lower gate part having a through conduit which is alignable with a fluid flow passageway in the valve body in the open position, such lower gate part having tapered surfaces parallel to the incline of the valve seats to seal therewith and establish fluid tight communication between the through conduit of the gate and the fluid flow passageway.
    Type: Grant
    Filed: February 11, 1992
    Date of Patent: August 17, 1993
    Inventor: Venkatesh R. Nevrekar
  • Patent number: 5205535
    Abstract: An expanding gate valve assembly which includes a gate, a stem for actuating the gate, a segment mounted on one side of the gate, or in an alternate, bidirectional embodiment, two segments with one segment movably mounted on each opposite side of the gate for movement toward seating surfaces within the valve body. Each segment carries two spaced, parallel wedging-camming surfaces which are of a configuration to cooperate with complementary spaced, parallel wedging-camming surfaces on the gate to effect lateral expansion of the segment or segments during closure or opening of the valve. The spacing of the wedging-camming surfaces or legs is such that the movable segments are stably supported during their expansion movement.
    Type: Grant
    Filed: January 10, 1991
    Date of Patent: April 27, 1993
    Inventor: Venkatesh R. Nevrekar
  • Patent number: D254326
    Type: Grant
    Filed: June 16, 1977
    Date of Patent: February 26, 1980
    Inventor: Venkatesh R. Nevrekar