Patents by Inventor Jonathan Robin Crabtree

Jonathan Robin Crabtree 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).

  • Apparatus for producing self-exciting hammer action, and rotary power tool incorporating such apparatus
    Patent number: 7036608
    Abstract: An apparatus for providing percussion action in a rotary power tool having a rotary output shaft, the apparatus comprising at least one moveable mass adapted to have a component of movement parallel to the axis of the rotary output shaft to cause impacts to be applied to a working member of the tool; and a device for intermittently converting rotary movement of the rotary output shaft into movement of at least one the moveable mass to cause the impacts to be applied to the working member.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: May 2, 2006
    Assignee: Black & Decker Inc.
    Inventors: Seamus D. Garvey, Jonathan Robin Crabtree
  • Apparatus for producing self-exciting hammer action, and rotary power tool incorporating such apparatus
    Publication number: 20040159452
    Abstract: An apparatus for providing percussion action in a rotary power tool having a rotary output shaft, the apparatus comprising at least one moveable mass adapted to have a component of movement parallel to the axis of the rotary output shaft to cause impacts to be applied to a working member of the tool; and conversion means for intermittently converting rotary movement of the rotary output shaft into movement of at least one the moveable mass to cause the impacts to be applied to the working member.
    Type: Application
    Filed: December 10, 2003
    Publication date: August 19, 2004
    Inventors: Seamus D. Garvey, Jonathan Robin Crabtree