Patents by Inventor Peter N. Bentley

Peter N. Bentley 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).

  • Liquid dispensing systems
    Patent number: 4349321
    Abstract: A valve chamber connected to the inlet of a ram pump has an inlet connected to a source of sludge and a substantially smaller inlet connected to the outlet of a metering pump.A valve seat in the valve chamber has a ball resting freely thereon, and an operative connection between the ram pump and the metering pump synchronizes the suction stroke of the ram pump with the discharge stroke of the metering pump to cause the incoming sludge to lift and spin the ball and thereby mix the sludge with the incoming additive.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: September 14, 1982
    Inventor: Peter N. Bentley
  • Pumping system
    Patent number: 4184331
    Abstract: A pumping system for pumping liquid clay or slip into a filter press comprises a hydraulically-powered double-acting ram for pumping the slip and a hydraulic control circuit for the ram. The control circuit includes a pair of hydraulic pumps one of which provides a high pressure, low volume delivery and the other of which provides a low pressure high volume delivery, and valves controlling the supply of oil from these pumps to the ram according to the resistance encountered by the ram.
    Type: Grant
    Filed: February 27, 1978
    Date of Patent: January 22, 1980
    Assignee: Thomas Willett & Company Limited
    Inventor: Peter N. Bentley