Patents by Inventor Malcolm Pridham

Malcolm Pridham 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).

  • Pipe Coupling Adapted for Sealing the End of a Pipe
    Publication number: 20090127803
    Abstract: The present invention relates to a sealing member for use in a pipe coupling assembly and, in particular, to a sealing member for sealing the end of a pipe having an exposed metal surface at its end, such as pipes comprising an internal metal sheath which is lined internally and externally with plastic. The sealing member includes a pipe receiving portion adapted to receive the end of the pipe to thereby prevent contact between the end of the pipe and fluid travelling through the pipe. The sealing member may be used in standard pipe couplings, or is preferably incorporated into a coupling having a deformable gripping member whereby upon tightening of the coupling assembly nut, the gripping member urges against the pipe both radially and longitudinally to thereby simultaneously grip the pipe and urge the pipe end within the pipe receiving portion.
    Type: Application
    Filed: October 12, 2005
    Publication date: May 21, 2009
    Applicant: PHILMAC PTY LTD
    Inventors: David Chelchowski, Geoffrey Brian Puckett, Malcolm Pridham
  • Coupling or transition fitting for the connection of metal or plastic pipes
    Patent number: 7255373
    Abstract: A pipe coupling having a radially deformable housing, wherein a pipe is freely insertable into the housing bore and a nut causes engagement of the grip ring with the pipe. The housing bore including a plurality of outwardly extending projections. The grip ring including a plurality of apertures adapted to receive the housing projections and a plurality of inwardly extending burst hole projections. Tightening of the nut causes the grip ring to be forced both radially and longitudinally, whereby the gripping member substantially restricts longitudinal and rotational movement of the pipe.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: August 14, 2007
    Assignee: Philmac Pty Ltd
    Inventor: Malcolm Pridham
  • Coupling or transition fitting for the connection of metal or plastic pipes
    Publication number: 20040090067
    Abstract: A pipe coupling having a radially deformable housing, wherein a pipe is freely insertable into the housing bore and a nut causes engagement of the grip ring with the pipe. The housing bore including a plurality of outwardly extending projections. The grip ring including a plurality of apertures adapted to receive the housing projections and a plurality of inwardly extending burst hole projections. Tightening of the nut causes the grip ring to be forced both radially and longitudinally, whereby the gripping member substantially restricts longitudinal and rotational movement of the pipe.
    Type: Application
    Filed: October 8, 2003
    Publication date: May 13, 2004
    Inventor: Malcolm Pridham
  • O-ring
    Patent number: D558037
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: December 25, 2007
    Assignee: Philmac Pty Ltd
    Inventors: David Chelchowski, Geoffrey Brian Puckett, Malcolm Pridham
  • Geared halfball component for a rotational valve
    Patent number: D695879
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: December 17, 2013
    Assignee: Philmac Pty Ltd
    Inventors: Malcolm Pridham, Geoff Puckett
  • Rotational valve assembly
    Patent number: D708706
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: July 8, 2014
    Assignee: Philmac Pty Ltd
    Inventors: Malcolm Pridham, Geoff Puckett