Tools – Wrench – screwdriver – or driver therefor – Responsive to torque on work
Reexamination Certificate
2007-01-09
2007-01-09
Wilson, Lee D. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Responsive to torque on work
C081S472000, C081S478000, C081S480000
Reexamination Certificate
active
11275086
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.
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European Search Report form European patent application No. EP 05 25 7666, dated May 11, 2006.
Berkun Chadd
Bollig William L.
Jamnia Mohammad A.
Matthis Marjavis J.
Parker Patricia H.
Hu-Friedy Mfg. Co., Inc.
Marshall & Gerstein & Borun LLP
McDonald Shantese
Wilson Lee D.
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