Patents by Inventor David Haywood

David Haywood 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).

  • Patent number: 8984898
    Abstract: A pressure wave generator (40) for driving one or more cryogenic refrigerator systems. The pressure wave generator (40) comprises a housing with one or more inlet/outlet ports (57,58) through which generated pressure waves of gas may pass through to drive a cryogenic refrigerator system or systems connected to the inlet/outlet ports (57,58). The pressure waves are generated by at least one pair of opposed diaphragms (41,42) located in the housing that are moveable in a reciprocating motion within the housing to create pressure waves in gas spaces (55,56) associated with each diaphragm (41,42). The gas spaces (55,56) each having associated inlet/outlet ports (57,58) through which the pressure waves may pass. An operable drive system is also provided to move the pair of diaphragms (41,42) in a reciprocating motion.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: March 24, 2015
    Assignee: Industrial Research Limited
    Inventors: Alan Caughley, David Haywood
  • Publication number: 20120227416
    Abstract: A pressure wave generator (40) for driving one or more cryogenic refrigerator systems. The pressure wave generator (40) comprises a housing with one or more inlet/outlet ports (57,58) through which generated pressure waves of gas may pass through to drive a cryogenic refrigerator system or systems connected to the inlet/outlet ports (57,58). The pressure waves are generated by at least one pair of opposed diaphragms (41,42) located in the housing that are moveable in a reciprocating motion within the housing to create pressure waves in gas spaces (55,56) associated with each diaphragm (41,42). The gas spaces (55,56) each having associated inlet/outlet ports (57,58) through which the pressure waves may pass. An operable drive system is also provided to move the pair of diaphragms (41,42) in a reciprocating motion.
    Type: Application
    Filed: March 21, 2012
    Publication date: September 13, 2012
    Inventors: Alan Caughley, David Haywood
  • Patent number: 8171742
    Abstract: A pressure wave generator (40) for driving one or more cryogenic refrigerator systems. The pressure wave generator (40) comprises a housing with one or more inlet/outlet ports (57,58) through which generated pressure waves of gas may pass through to drive a cryogenic refrigerator system or systems connected to the inlet/outlet ports (57,58). The pressure waves are generated by at least on pair of opposed diaphragms (41,42) located in the housing that are moveable in a reciprocating motion within the housing to create pressure waves in gas spaces (55,56) associated with each diaphragm (41,42). The gas spaces (55,56) each having associated inlet/outlet ports (57,58) through which the pressure waves may pass. An operable drive system is also provided to move the pair of diaphragms (41,42) in a reciprocating motion.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: May 8, 2012
    Assignee: Industrial Research Limited
    Inventors: Alan James Caughley, David Haywood
  • Publication number: 20110244000
    Abstract: An antimicrobial film laminate assembly is disclosed. The assembly includes an antimicrobial film laminate having a first surface at least partially coated with an adhesive and an opposing second surface, the antimicrobial film laminate includes at least one antimicrobial compound, and a unitary backing positioned upon the first surface of the antimicrobial film laminate.
    Type: Application
    Filed: April 5, 2011
    Publication date: October 6, 2011
    Inventors: Lawrence Woodcock Gorin, John David Haywood, Robert Douglas Hamilton
  • Publication number: 20080253910
    Abstract: A pressure wave generator (40) for driving one or more cryogenic refrigerator systems. The pressure wave generator (40) comprises a housing with one or more inlet/outlet ports (57,58) through which generated pressure waves of gas may pass through to drive a cryogenic refrigerator system or systems connected to the inlet/outlet ports (57,58). The pressure waves are generated by at least on pair of opposed diaphragms (41,42) located in the housing that are moveable in a reciprocating motion within the housing to create pressure waves in gas spaces (55,56) associated with each diaphragm (41,42). The gas spaces (55,56) each having associated inlet/outlet ports (57,58) through which the pressure waves may pass. An operable drive system is also provided to move the pair of diaphragms (41,42) in a reciprocating motion.
    Type: Application
    Filed: April 21, 2006
    Publication date: October 16, 2008
    Inventors: Alan James Caughley, David Haywood