Pneumatic nut runner with torque indicator - has mechanical linkage transmitting tool handle flexure to dial gauge to indicate maximum torque in fastener

摘要

The pneumatically powered hand-held torque wrench having a dial gauge arranged on the handle of the wrench to display the amount of torque exerted by the tool. A pointer indicates the tool maximum torque attained during tool operation, including manual torquing effort by the tool operator. The pointer maintains maximum torque read-out until the pointer is reset by the operator. A mechanical linkage arrangement transmits tool handle flexure into rotation of the dial gauge to indicate the max. torque value developed. A torque tube is affixed at one end of the motor portion and at the other end to an enclosed end of the handle portion. The torque tube resists change in axial alignment between the motor portion and the handle.