Patents by Inventor Lee A. Perkins

Lee A. Perkins 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).

  • Air release valve
    Patent number: 6145533
    Abstract: An air release valve comprising a housing having a fluid inlet and a fluid outlet, a valve plate within the housing between the inlet and outlet, the valve plate having a pair of apertures; a valve seal assembly including a seal engageable with the valve plate overlying the apertures; a float located in the housing upstream of the valve plate and connected to the seal, the float displaceable between first and second positions in the housing such that displacement of the float in one direction opens the apertures, the float having a tapered end remote from the seal, the tapered end having a truncated substantially flat bottom surface and a groove extending across the flat bottom surface.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: November 14, 2000
    Assignee: Nelson Irrigation Corporation
    Inventor: Lee A. Perkins
  • Air release valve
    Patent number: 5957150
    Abstract: An air release valve includes a housing having a fluid inlet and a fluid outlet, a valve plate within the housing between the inlet and outlet, the valve plate having a pair of discrete apertures isolated from each other; a valve seal assembly including a seal engageable with the valve plate overlying the apertures; a float located in the housing upstream of the valve plate and connected to the seal, the float displaceable between first and second positions in the housing wherein displacement of the float in one direction progressively detaches successive portions of the seal from the apertures, the float having a tapered end remote from the seal.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: September 28, 1999
    Assignee: Nelson Irrigation Corporation
    Inventor: Lee A. Perkins
  • Air release valve
    Patent number: 5794646
    Abstract: An air release valve includes a housing having a fluid inlet and a fluid outlet, a valve plate within the housing between the inlet and outlet, the valve plate having a pair of discrete apertures isolated from each other; a valve seal assembly including a seal engageable with the valve plate overlying the apertures; a float located in the housing upstream of the valve plate and connected to the seal, the float displaceable between first and second positions in the housing wherein displacement of the float in one direction progressively detaches successive portions of the seal from the apertures, the float having a tapered end remote from the seal, the tapered end movable into a tapered internal inlet when the float moves to the second position.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: August 18, 1998
    Assignee: Nelson Irrigation Corporation
    Inventor: Lee A. Perkins