Method of using vacuum lifted blade sharpener for rotary mowers

Details Method of using vacuum lifted blade sharpener for rotary mowers Method of using vacuum lifted blade sharpener for rotary mowers

1979-03-19

1981-08-25

Smith, Gary L.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

76 821, 51211R, 51250, B24B 100

Patent

active

042851696

ABSTRACT:
Method and apparatus are disclosed for sharpening the blade of a rotary mower. Sharpening is accomplished by utilizing the upward vacuuming action created by the rotation of the blade. At present blades having downwardly turned cutting edges and upwardly turned trailing edges have been found to create the requisite vacuum for the operation of the sharpening apparatus.

REFERENCES:
patent: 970619 (1910-09-01), Gardner
patent: 2826032 (1958-03-01), Hayes
patent: 3101629 (1963-08-01), Koelndorfer
patent: 3136107 (1964-06-01), Spear
patent: 3225527 (1965-12-01), Spear
patent: 3596412 (1971-08-01), Brayman
patent: 3636666 (1972-01-01), Brayman
patent: 3665658 (1972-05-01), Warwick
patent: 3768163 (1973-10-01), Weber
patent: 3782039 (1974-01-01), Warwick

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