Patents by Inventor Michael John Fox

Michael John Fox 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).

  • Solenoid valve
    Patent number: 7866796
    Abstract: A solenoid valve making use of certain materials which is capable of operation at high frequencies and which can be made as a compact unit. The plunger (1) is made from a material having a saturation flux density greater than 1.4 Tesla preferably more than 1.6 Tesla, a coercivity at less than 0.25 ampere per centimeter and a relative magnetic permeability in excess of 10.000; and the nozzle bore leading from the valve head chamber (14) to the nozzle orifice (12) has a length to diameter ratio of less than 8:1 preferably between 2:1 to 4:1 and the nozzle orifice (12) has a diameter substantially the same as that of the nozzle bore. The invention also relates to method for operating a drop on demand ink jet printer incorporating such a valve.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: January 11, 2011
    Assignee: Videojet Technologies Inc.
    Inventors: David Andrew Horsnell, Matthew Brian Tomlin, Ammar Lecheheb, Oliver John Prime, Michael John Fox, Christopher Michael Bates
  • Solenoid valve for a drop on demand ink jet printer
    Patent number: 7571986
    Abstract: The invention relates to a solenoid valve made using certain materials which is capable of operation at high frequencies and which can be made as a compact unit. The invention also relates to method for operating a drop on demand ink jet printer incorporating such a valve.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: August 11, 2009
    Assignee: Videojet Technologies Inc.
    Inventors: David Andrew Horsnell, Matthew Brian Tomlin, Ammar Lecheheb, Oliver John Prime, Michael John Fox, Christopher Michael Bates
  • Solenoid valve
    Patent number: 7410245
    Abstract: The invention relates to a solenoid valve made using certain materials which is capable of operation at high frequencies and which can be made as a compact unit. The plunger (1) is made from an electromagnetic material having a saturation flux density greater than 1.2 Tesla preferably more than 1.6 Tesla, the bore leading from the valve head chamber (14) to the nozzle orifice (12) has a length to diameter ratio of less than 5:1 preferably between 2:1 and 4:1 and the nozzle orifice (12) has a diameter of 80 micrometer or less. The invention also relates to method for operating a drop on demand ink jet printer incorporating such a valve.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: August 12, 2008
    Assignee: Willett International Limited
    Inventors: David Andrew Horsnell, Matthew Brian Tomlin, Ammar Lecheheb, Oliver John Prime, Michael John Fox, Christopher Michael Bates
  • Solenoid valve
    Patent number: 7331654
    Abstract: The invention relates to a solenoid valve made using certain materials which is capable of operation at high frequencies and which can be made as a compact unit. The plunger (1) is made from an electromagnetic material having a saturation flux density greater than 1.2 Tesla preferably more than 1.6 Tesla, the bore leading from the valve head chamber (14) to the nozzle orifice (12) has a length to diameter ratio of less than 5:1 preferably between 2:1 and 4:1 and the nozzle orifice (12) has a diameter of 80 micrometer or less. The invention also relates to method for operating a drop on demand ink jet printer incorporating such a valve.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: February 19, 2008
    Assignee: Willett International Limited
    Inventors: David Andrew Horsnell, Matthew Brian Tomlin, Ammar Lecheheb, Oliver John Prime, Michael John Fox, Christopher Michael Bates