Patents by Inventor Chadd Berkun

Chadd Berkun 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).

  • Torque limiting wrench for ultrasonic scaler tip insertion
    Patent number: 7159494
    Abstract: A torque wrench for preventing transmission of torque in excess of a threshold level to avoid damage to replaceable scaler tips and hand pieces of ultrasonic dental instruments. The torque wrench has a housing with a core seated therein, with a cam mechanism or spring engagement between the core and the housing, such that the core may remain stationary when the housing is rotated passed the threshold level of torque. The core has an axial bore to receive a connecting shaft of a scaler tip, such that a working end and a functional shank of the scaler tip are received in a chamber of the housing, with the housing acting as an isolation cage for the scaler tip.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: January 9, 2007
    Assignee: Hu-Friedy Mfg. Co., Inc.
    Inventors: Mohammad A. Jamnia, Patricia H. Parker, William L. Bollig, Chadd Berkun, Marjavis J. Matthis
  • TORQUE LIMITING WRENCH FOR ULTRASONIC SCALER TIP INSERTION
    Publication number: 20060123958
    Abstract: A torque wrench for preventing transmission of torque in excess of a threshold level to avoid damage to replaceable scaler tips and hand pieces of ultrasonic dental instruments. The torque wrench has a housing with a core seated therein, with a cam mechanism or spring engagement between the core and the housing, such that the core may remain stationary when the housing is rotated passed the threshold level of torque. The core has an axial bore to receive a connecting shaft of a scaler tip, such that a working end and a functional shank of the scaler tip are received in a chamber of the housing, with the housing acting as an isolation cage for the scaler tip.
    Type: Application
    Filed: December 8, 2005
    Publication date: June 15, 2006
    Inventors: Mohammad Jamnia, Patricia Parker, William Bollig, Chadd Berkun, Marjavis Matthis
  • Method of verifying the correct sequence of assembly of a multilayer gasket
    Patent number: 5210943
    Abstract: A multilayer gasket assembly and a method of making same in a verified correct sequence. Each layer defines sensing formations which sensing formations when stacked over an array of sensors sequentially in a superposed array verify and signify that the layers have been correctly stacked to enable a subsequent operation such as one which secures the layers together.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: May 18, 1993
    Assignee: Fel-Pro Incorporated
    Inventors: Chadd Berkun, Thomas J. Justus, Glen Schwerdtfeger, David Verson