Ergonomic writing instrument

  • US 5,228,794 A
  • Filed: 05/31/1991
  • Issued: 07/20/1993
  • Est. Priority Date: 05/31/1991
  • Status: Expired due to Term
First Claim
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1. An ergonomic writing instrument comprising a shell having a longitudinal axis having opposite ends and a hollow interior, a writing instrument positioned within said interior of said shell with its operational end extending from one of said shell ends, said shell having a groove therein extending from adjacent said one shell end axially of said shell, said groove having a bottom surface and an upstanding wall adapted for the fingers and the thumb of the writing hand holding the instrument to be positioned in said groove against said upstanding wall to oppose the force of the writing instrument against the writing surface in the axial direction during use, said groove spiraling around said shell, said bottom surface having a width greater than the size of the pad of said fingers, said groove having at least one full turn adjacent to said one end and between said opposite shell ends, said bottom surface extending between one turn of said wall and an adjacent turn of said wall, said wall facing said other shell end, said fingers having no walls therebetween when placed in said groove, whereby one can pick up said writing instrument and easily grip said writing instrument correctly with a lighter grip than with conventional writing instruments and yet press harder while writing without the fatigue, writing cramps or calluses normally associated with handwriting for long periods of time.

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