Patents by Inventor DeVerne Hoggarth

DeVerne Hoggarth 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: 7059423
    Abstract: A jackhammer system for reducing the vibration and noise experienced by an operator of the jackhammer. The jackhammer system includes a housing, a chisel movably positioned within a lower neck of the housing, a pair of flywheels rotatably attached to a pair of support brackets, a ram slidably positioned within a guide channel and engageable by the flywheels to engage the chisel, a plurality of elastic members attached to the ram, and an actuator mechanically connected to the support brackets for controlling a position of the flywheels. An upper sensor and a lower sensor determine the position of the ram within the guide channel. An engaging plate supported by a plurality of compression springs receives the downwardly impact of the ram when driving the chisel downwardly. A recoil absorber having a recoil spring is attached to an upper portion of the housing for absorbing the recoil of the ram.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: June 13, 2006
    Inventor: DeVerne Hoggarth