Fel-pro Incorporated

Hu-friedy Mfg. Co., Inc.

Chadd Berkun

Mohammad Ali Jamnia

Marjavis J Matthis

William L Bollig

Patricia H Parker

Thomas J Justus

David Verson

Glen Schwerdtfeger

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.

Torque limiting wrench for ultrasonic scaler tip insertion

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.

Method of verifying the correct sequence of assembly of a multilayer

Growing community of inventors

Highland Park, IL, United States of America

Chadd Berkun