Patent ID: 9440325
Filing Date: 2016-09-13
CPC Classification: B24B

Claim Text:
1. A self-powered electric sharpener for sharpening the edge of a tool comprising an abrasive wheel assembly being mounted on a powered rotatable shaft, said abrasive wheel assembly having a flexible hub affixed against movement relative to said rotatable shaft, a peripheral abrasive ring operatively connected to said flexible hub by a radially extending, non-abrasive central portion for rotation for sharpening the edge of a tool, an inner portion of said non-abrasive central portion being flexibly affixed to said flexible hub and an outer portion of said non-abrasive central portion being affixed to said to said peripheral abrasive ring, and said flexible hub allowing said inner portion and hence said abrasive ring to deflect relative to the flexible hub by an amount determined by the force applied to said peripheral ring by the tool being sharpened to absorb the force transmitted to said rotatable shaft and to maintain the rotational speed of said rotatable shaft generally constant.