Device for sharpening lawn mower blades
OwnerCharles I. Horrellinventor
Life of this patent
Estimating the term…
Abstract
A device for use with a portable electric drill having an abrasive wheel attached thereto for rotation thereby. The device includes a base for holding the drill in a substantially horizontal position and a clamp for holding a lawn mower blade. A rail is adjustably attached to the base. A rail follower is slidably attached to the rail for reciprocating movement thereon substantially parallel to the longitudinal axis of the abrasive wheel. The clamp is fixedly attached to the rail follower. When the rail is adjusted so that the cutting edge of the blade held in the clamp is in contact with the abrasive wheel and when the drill is activated to rotate the abrasive wheel, reciprocation of the rail follower will cause the cutting edge of the blade to be sharpened.
Claims8
A lawn mower blade sharpening device for use with a motor having an abrasive wheel attached thereto, said device comprising:
- (a) clamp means for holding said lawn mower blade;
- (b) attachment means for attaching said clamp means to said motor so as to allow said clamp means to be manually reciprocated back and forth substantially parallel to the longitudinal axis of said abrasive wheel with the cutting edge of said lawn mower blade in contact with said abrasive wheel, said attachment means including a rail means for being attached to said motor and a rail follower means for being attached to said clamp means and for reciprocating movement along said rail means, said rail means including a first leg for being slidably attached to said motor and including a second leg fixedly attached to said first leg for movement between an infinite number of positions along a plane substantially parallel to a horizontal plane passing through the longitudinal axis of said abrasive wheel;
- and
- (c) lock means for selectively locking said second leg of said rail means in one of said infinite number of positions.
A lawn mower blade sharpening device for use with a portable electric hand drill having an abrasive wheel attached thereto, said device comprising:
- (a) base means for holding said drill;
- (b) clamp means for holding said lawn mower blade;
- (c) attachment means for attaching said clamp means to said base means so as to allow said clamp means to be manually reciprocated back and forth substantially parallel to the longitudinal axis of said abrasive wheel with the cutting edge of said lawn mower blade in contact with said abrasive wheel, said attachment means including a rail means for being attached to said base means and a rail follower means for being attached to said clamp means and for reciprocating movement along said rail means, said rail means including a first leg having first and second ends and including a second leg having first and second ends, said first end of said first leg being attached to said first end of said second leg at substantially a right angle thereto, said base means having an aperture therethrough, the longitudinal axis of said aperture being substantially perpendicular to the longitudinal axis of said abrasive wheel, said first leg being slidably positioned in said aperture with said second leg substantially parallel to the longitudinal axis of said abrasive wheel, said second leg being movable between an infinite number of positions along a plane substantially parallel to a horizontal plane passing through the longitudinal axis of said abrasive wheel, and
- (d) lock means for selectively locking said second leg in one of said infinite number of positions.
Dependencies are inferred from the claim text.