Universal rotary blade holder for sharpener

Details Universal rotary blade holder for sharpener Universal rotary blade holder for sharpener

2011-03-01

2011-03-01

Eley, Timothy V (Department: 3724)

Abrading

Machine

Rotary tool

C451S045000, C451S234000, C451S293000, C451S367000

Reexamination Certificate

active

07896729

ABSTRACT:
A blade-sharpening machine for sharpening any one of various sizes of rotary blades comprises a drive unit and a universal blade chuck for holding the blade to be sharpened. The drive unit further includes a sharpening assembly that sharpens the blade while the drive unit rotates the blade chuck. The blade chuck includes a chassis and jaws that are circumferentially spaced about the chassis and are shiftably attached thereto for securing the rotary blade. A spring-loaded fastener normally urges the jaws radially inwardly into engagement with the blade. A centrally-positioned cam is operable to shift the jaws simultaneously so that the blade can be selectively secured on the blade chuck.

REFERENCES:
patent: 5084976 (1992-02-01), Ross
patent: 5667427 (1997-09-01), Airhart et al.
Exhibit—photographs of prior art rotary blade sharpener and single rotary blade holder (photographs taken Apr. 20, 2007).
Exhibit B—photographs of prior art multiple blade holders (photographs taken Apr. 20, 2007).
Printout from Bettcher Website (printed Aug. 2, 2007).

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