Rotary and yieldable drive means for a tool

Abstract

The combination of a rotary tool and a drive therefor, the tool having a conical taper between 60.degree. and 120.degree. to chamfer or remove burrs from machined workpieces. The tool comprises a casing containing a motor for rotating the tool, the motor having a drive shaft connected for rotation to the tool, and the tool having a shaft coaxial with the drive shaft. The drive shaft and the tool shaft are elastically connected for axial sliding movement of the tool shaft relative to the drive shaft against a force urging the tool shaft in a direction away from the drive shaft. The drive shaft is splined, and the tool shaft has thereon a splined member surrounding and engaging with the splines of the drive shaft. The tool shaft is mounted in a piston for rotation, and fluid pressure is supplied to the piston in a direction to urge the piston away from the motor, by conveying air under pressure through the motor and through the drive shaft to a region between the drive shaft and the tool shaft communicating with a face of the piston to urge the piston away from the motor.

Dependencies are inferred from the claim text.