Torque sensing automatic shut-off and reset clutch for screwdrivers, nutsetters and the like
August 31, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3237742 3442362 3766990 Pneumatic screwdriver with torque responsive shut-off Torque controller shutoff mechanism Low torque automatic screwdriver Torque control and fluid shutoff mechanism for a fluid operated tool Torque sensing, automatic shut-off and reset clutch for toggle controlled screwdrivers, nutsetters and the like Torque sensing, automatic shut-off and reset clutch for screwdrivers, nutsetters and the like Patent #: 4880064 InventorsAssigneeApplicationNo. 576283 filed on 08/31/1990US Classes:477/178, Engine shut off173/178, Having torque responsive clutch192/56.62, Ball or roller192/150Overload releaseExaminersPrimary: Bonck, Rodney H.Attorney, Agent or FirmInternational ClassesF16D 043/20B25B 023/14 AbstractAn improved torque control and fluid shut-off mechanism for a fluid operated tool includes a driving clutch member and a driven bit holder connected by ball bearings retained by the clutch member which engages in pockets in the bit holder. The pockets include a specific ramp construction which insures that the threshold torque level of the tool in the forward direction is less than the threshold level in the reverse direction.Field of SearchOverload release | |
