Patents by Inventor Phillip M. Edwards

Phillip M. Edwards 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).

  • Multifunction valve
    Patent number: 6264436
    Abstract: A multifunction hydraulic valving apparatus includes a relief valve, a gas purge valve and a bleed valve disposed in a single bore.
    Type: Grant
    Filed: May 11, 1999
    Date of Patent: July 24, 2001
    Assignee: Milton Roy Company
    Inventors: Phillip M. Edwards, James K. Sutherland, Robert J. Meehan
  • Metering diaphragm pump having a front removable hydraulic refill valve
    Patent number: 6086340
    Abstract: A hydraulic refill valving apparatus can be removed from the front of a metering pump without requiring the entire displacement chamber to be removed from the pump drive mechanism. The valving apparatus separately mounts a mechanically actuated refill valve and a refill check valve such that they can be removed from the front of the pump with relative ease, leaving the displacement chamber connected to the drive mechanism with the sealing gasket therebetween. By separating the refill valve and refill check valve functions into two separate assemblies, the apparatus is made more reliable in that it is less susceptible to problems encountered with relatively high viscosity working fluid.
    Type: Grant
    Filed: May 11, 1999
    Date of Patent: July 11, 2000
    Assignee: Milton Roy Company
    Inventors: Phillip M. Edwards, Robert J. Meehan