Patent ID: 8240055
Filing Date: 2012-08-14
Classification: B23D,B25F,B27C

Abstract:
1. A hand tool comprising: a housing attached to a hand-held motor, said hand-held motor extending along a center line and dimensioned to be held and maneuvered with a single hand; a flexible drive shaft having an elongated strip of a titanium material, said strip having a length dimension, a width dimension which is less than said length dimension, and a thickness dimension which is less than said width dimension, said strip being curved along its width dimension and being bent along its length dimension and wound into a helical coil, wherein said helical coil is a closed helical coil and is wound so as to produce a plurality of turns wherein each turn of said coil overlaps with an adjacent turn, said helical coil having a first and a second end; a first coupler affixed to the first end of the coil; and a second coupler affixed to a rotatable tool and the second end of said coil; said housing holding said first coupler at a fixed location relative to said second coupler, said center line of said motor and a central axis of said rotatable tool intersecting at an angle of less than 90 degrees, and said drive shaft operable to transfer torque from said motor to said rotatable tool.