Title: Cutting blade edge construction for mechanically actuated shears

Abstract: Pairs of planar cutting blades with angularly related cutting edges such as are used in grass shears, and the like, and which are mechanically actuated to move relative to each other and to cut by a scissors-like action are formed in a manner such that during each cutting action the contacting cutting point between each pair of coacting edges moves at a uniform speed. The improved blade construction finds application in shears, particularly cordless, i.e., battery, grass shears, by more nearly equalizing incremental power requirements; by reducing the maximum input power requirements; and by increasing time of performance between battery recharging at a given forward advancement speed of the shear.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Jones, John E. (Danville, VA, US)
Lineback, Lynn D. (Danville, VA, US)

Application Number: 500140
Filing Date: 1974-08-23
Publication_date: 1976-01-27
Assignee: Disston, Inc. (Pittsburgh, PA)
Primary Class(es): 30/220 30/222, 30/DIG1
Other Classes:
US Patent Ref:

360374	Mar, 1887	Clough	30/223.
2652626	Sep, 1953	Dutcher	30/220.
3193925	Jul, 1965	Hawley	30/223.
3218710	Nov, 1965	Bruck	30/222.
3564714	Feb, 1971	Wells	30/223.
3623223	Nov, 1971	Edgell	30/222.
3763638	Oct, 1973	Vogelenzang	56/293.

Other Refs:
Primary Examiner: Smith, Al Lawrence
Assistant Examiner: Peters, J. C.
Attorney: Olive; B. B.