Adaptive, ergonomic, multi-purpose hand-held tool with flexible drive shaft
OwnerElwyn Goodinginventor
Life of this patent
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Abstract
An adaptive, ergonomic designed multi-purpose air motor driven hand-held trimmer that uses the air motor as the handle, has the air motor offset at an angle of 25 degrees to the fore and aft axis of the base plate and downward 10 degrees, to thereby have the center of gravity as near as possible to the wrist of the operator so that there will not be a constant bending of the wrist or exerting of constant hard pressure on the tissue at the base of the hand, thus virtually eliminating the possibility of the operator acquiring the carpal tunnel syndrome. Further disclosed are particular flexible drive shafts which may be used in the tool.
Claims14
A highly flexible drive shaft which is capable of transmitting high levels of torque, said drive shaft comprising:
- 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 wound into a helical coil, 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 the second end of said coil.
A flexible drive shaft for a hand-held tool having a rotary drive component, said drive shaft comprising:
- a cable comprising a plurality of wound wire strands;
- a composite body of a polymer-impregnated carbon fiber composition wrapped about said cable;
- a sleeve of a second carbon fiber material disposed around said composite body.
Dependencies are inferred from the claim text.