Harvesters – Cutting – Rotating cutting-reel type
Patent
1984-08-03
1985-04-09
Mancene, Gene
Harvesters
Cutting
Rotating cutting-reel type
51250, 51288, 76 821, B24B 1900
Patent
active
045093164
ABSTRACT:
An improved rotary, power lawn mower sharpener is disclosed which includes a base member having a lever pivotally mounted thereon for horizontal motion and having a handle for actuating the lever. The sharpener further includes a wedge having a horizontal, planar, bottom surface for sliding engagement with the upper surface of the base, and having an inclined, planar, upper surface, the wedge connected by means of a link element to the lever, the lever acting to displace the wedge in a horizontal direction. A tray member is pivotally mounted by means of a horizontal pivot, the tray having a planar, bottom surface adapted for sliding engagement with the inclined, upper surface of the wedge when the wedge is moved horizontally by the lever. A grinding stone is mounted in the tray, having an upper, planar grinding surface which is raised when the wedge moves inwardly beneath the tray and which is lowered when the wedge is moved outwardly from beneath the tray. In operation, the base member is positioned beneath a rotary power lawn mower by rolling the wheels of the mower over the base and moving the handle so that the lever pulls the wedge outwardly from beneath the tray member, lowering the grinding stone so that the upper surface thereof clears the bottom edge of the mower. In further operation, the blade is sharpened by moving the handle so that the lever pushes the wedge inwardly beneath the tray member, raising the grinding stone to operatively contact the moving blade.
REFERENCES:
patent: 3225527 (1965-12-01), Spear
patent: 3596412 (1971-08-01), Brayman
patent: 3636666 (1972-01-01), Brayman
patent: 3659385 (1972-05-01), Ferguson
Mancene Gene
Miller Stanley M.
Tarnoff David L.
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