Patents by Inventor John Grzan

John Grzan 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: 7176397
    Abstract: An electrical switch mat which generally includes a first layer of flexible matting material, a second layer of flexible matting material, and a perimeter ribbon switch disposed between the first layer and the second layer. The ribbon switch has a longitudinal edge and is operable under pressure between a closed condition and an open condition and maintained in one of the open and closed conditions in the absence of pressure. The first and second layers have a peripheral edge which is aligned with the longitudinal edge of the ribbon switch in a coplanar relationship to form a peripheral edge of the electrical switch mat.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: February 13, 2007
    Assignee: Tapeswitch Corporation
    Inventor: John Grzan
  • Patent number: 7119704
    Abstract: A machine guarding system generally includes a switch mat in electrical communication with a machine being guarded. The switch mat is adapted to be placed on a floor adjacent the machine being guarded and includes a pressure actuated switch mechanism which causes power to the machine to be terminated when a pressure is applied to the switch mat. The switch mat further includes a status indicator display disposed on a surface of the switch mat which is illuminated based on a status of the machine being guarded. In a preferred embodiment, the machine guarding system further includes a machine control unit for controlling power to the machine being guarded. The switch mat is in electrical communication with the machine control unit, wherein the switch mechanism causes the machine control unit to terminate power to the machine when a pressure is applied to the switch mat. The machine control unit also illuminates the indicator display based on a status of the machine being guarded.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: October 10, 2006
    Assignee: Tapeswitch Corporation
    Inventors: John Grzan, Robert Keats
  • Publication number: 20060175184
    Abstract: An electrical switch mat which generally includes a first layer of flexible matting material, a second layer of flexible matting material, and a perimeter ribbon switch disposed between the first layer and the second layer. The ribbon switch has a longitudinal edge and is operable under pressure between a closed condition and an open condition and maintained in one of the open and closed conditions in the absence of pressure. The first and second layers have a peripheral edge which is aligned with the longitudinal edge of the ribbon switch in a coplanar relationship to form a peripheral edge of the electrical switch mat.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 10, 2006
    Inventor: John Grzan
  • Publication number: 20060082465
    Abstract: A machine guarding system generally includes a switch mat in electrical communication with a machine being guarded. The switch mat is adapted to be placed on a floor adjacent the machine being guarded and includes a pressure actuated switch mechanism which causes power to the machine to be terminated when a pressure is applied to the switch mat. The switch mat further includes a status indicator display disposed on a surface of the switch mat which is illuminated based on a status of the machine being guarded. In a preferred embodiment, the machine guarding system further includes a machine control unit for controlling power to the machine being guarded. The switch mat is in electrical communication with the machine control unit, wherein the switch mechanism causes the machine control unit to terminate power to the machine when a pressure is applied to the switch mat. The machine control unit also illuminates the indicator display based on a status of the machine being guarded.
    Type: Application
    Filed: October 19, 2004
    Publication date: April 20, 2006
    Inventors: John Grzan, Robert Keats