US 9,808,901 B2
Selectively deployable rotatable edge guide to support a cutting tool during a sharpening operation
Daniel T. Dovel, Shady Cove, OR (US)
Assigned to Darex, LLC, Ashland, OR (US)
Filed by Darex LLC, Ashland, OR (US)
Filed on May 29, 2014, as Appl. No. 14/290,587.
Prior Publication US 2015/0343590 A1, Dec. 3, 2015
Int. Cl. B24B 3/36 (2006.01); B24B 23/02 (2006.01); B24B 23/06 (2006.01); B24B 23/00 (2006.01)
CPC B24B 3/36 (2013.01) [B24B 23/005 (2013.01); B24B 23/02 (2013.01); B24B 23/06 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A tool sharpener for sharpening a cutting tool, the tool sharpener comprising:
an abrasive medium having an abrasive surface;
a stationary tool support guide adjacent a first edge of the abrasive medium having a side guide surface extending along a guide plane at a selected angle with respect to the abrasive surface to engage, via sliding contact, a side of the tool during presentation of a cutting edge of the tool against the abrasive surface; and
a rotatable edge guide adjacent an opposing, second edge of the abrasive medium so that the abrasive medium extends between the rotatable edge guide and the stationary tool support guide, the rotatable edge guide comprising a roller member having a curvilinearly extending outer surface rotatable about an edge guide roller axis, the roller member moveable between a deployed position and a retracted position, the deployed position of the rotatable edge guide configured to facilitate contacting support of a proximal end of the cutting edge of the tool by the curvilinearly extending outer surface of the roller member adjacent the second edge of the abrasive medium during concurrent support of the side of the tool by the stationary tool support guide adjacent a distal end of the cutting tool adjacent the first edge of the abrasive medium to sharpen the cutting edge, the retracted position of the rotatable edge guide configured to place the curvilinearly extending outer surface of the roller member in a non-contacting, clearing relation with respect to the tool during support of the side of the tool by the stationary tool support guide adjacent the distal end of the cutting tool adjacent the first edge of the abrasive member to sharpen the cutting edge.
 
16. A tool sharpener for sharpening a tool, the tool sharpener comprising:
a base structure which encloses an electric motor;
an abrasive medium supported by the base structure and adapted for rotational movement responsive to the electric motor, the abrasive medium having an abrasive surface extending along a neutral plane;
a stationary tool support guide having a guide surface extending along a guide plane at a selected angle with respect to the neutral plane to engage, via sliding contact, a side of the tool during presentation of a cutting edge of the tool against the abrasive surface, the stationary tool support guide disposed adjacent a first edge of the abrasive medium; and
a rotatable edge guide disposed adjacent an opposing, second edge of the abrasive medium so that the abrasive medium is disposed between the rotatable edge guide and the stationary tool support guide, the rotatable edge guide comprising a roller member having a curvilinearly extending outer surface rotatable about an edge guide roller axis, the rotatable edge guide further rotatable about an edge guide central axis between a deployed position and a retracted position, wherein in the deployed position the roller member is a first distance from the guide surface to facilitate contacting support of a proximal end of the cutting edge of the tool by the curvilinearly extending outer surface of the roller member adjacent the second edge of the abrasive medium during concurrent support of the side of the tool by the stationary tool support guide adjacent a distal end of the cutting tool adjacent the first edge of the abrasive medium to sharpen the cutting edge, and wherein in the retracted position the roller member is a second distance from the guide surface greater than the first distance to place the curvilinearly extending outer surface of the roller member in a non-contacting, clearing relation with respect to the tool during support of the side of the tool by the stationary tool support guide adjacent the distal end of the cutting tool adjacent the first edge of the abrasive member to sharpen the cutting edge.