Patents by Inventor Peter Ashley Burke

Peter Ashley Burke 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).

  • Valve cartridge for lift valve having the closing pressure on the sealing limited
    Patent number: 6189561
    Abstract: Valve cartridge (10) includes a housing (32) having inlet member (54), outlet member (52) and screw thread (34). Cavity (36) extends axially through housing (32) within which is a piston (38) which moves axially against piston seal (44) to open and close tap (10). A flow chamber (40) is provided at the end of housing (32) and includes a first seal (42) for sealing against a valve seat (18) in the tap (10). Piston (38) can be moved axially by either a rotatable spindle (46) or, a solenoid (48) and push rod (50). Piston (38) is moved axially without any rotation. Coupling member (84) couples spindle (46) to piston (38) and rotates relative to the piston (38) and the spindle. When spindle (46) is turned a predetermined number of revolutions the coupling (84) causes piston (38) to abut piston seal (44), any further rotation of spindle (46) causes rotation of the coupling member (84) without effecting the axial position of piston (38).
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: February 20, 2001
    Assignee: Wavtech Pty. Ltd.
    Inventors: Peter Ashley Burke, Alan Leeming, Charles Fridlender