Patents by Inventor Stephen D. Royle

Stephen D. Royle 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).

  • Hydrant design
    Patent number: 6178988
    Abstract: A hydrant valve assembly including a spool member having at least one spool seal which is at times under extremely high pressure tending to cause the seal to be displaced from an associated recess, the spool member forming venting passages in the seal recess to alleviate seal pressure, the invention also including a new wet pipe design and a new collar design.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: January 30, 2001
    Assignee: Baker Manufacturing
    Inventor: Stephen D. Royle
  • Well cap snorkel vent
    Patent number: 5823259
    Abstract: A dual float snorkel vent for use in sealing a well conduit vent cap from flood waters that could contaminate well water therebelow. A lower float causes an upper float to seal a check valve as water rises and prior to water reaching the level of the upper float and the snorkel vent is positioned at an appreciable vertical distance below an inlet to the vent cap to ensure that no water enters the vent conduit.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: October 20, 1998
    Assignee: Baker Manufacturing Company
    Inventor: Stephen D. Royle
  • Automatic cleaning and metering device
    Patent number: 4502510
    Abstract: A fluid system is disclosed having a passage with a reduced diameter orifice. A wire extends into the orifice and is reciprocated therein to simultaneously clean and meter a predetermined fluid flow through the orifice. Automatic reciprocating movement of the wire is accomplished by differential pressures acting on the wire on opposite sides of the orifice.
    Type: Grant
    Filed: February 9, 1983
    Date of Patent: March 5, 1985
    Assignee: Dana Corporation
    Inventor: Stephen D. Royle