Patent ID: 7121935

Claim:
A manually usable blade sharpener at least employable for precision blade sharpening comprising at least two sharpening strip-providing carriers ( 12 , 14 ) each presenting an abrasive sharpening strip ( 16 . 1 ) with the carriers ( 12 , 14 ), as mounted to be independently and linearly displaced towards and away from one another, being arranged and mounted to cause the sharpening strips ( 16 . 1 ), as crossing one another in defining a sharpening angle ( 17 ), to be displaced in adjacent planes to the effect of maintaining a fixed acute sharpening angle defining crossover relationship at a point of sharpening strip crossover ( 28 ) that is consequently uni-planarly movable in response to relative displacement of the carriers ( 12 , 14 ), biasing means ( 36 ) that biases the carriers to an inter-strip commencement crossover point defined at the one end of the range of displacement of the carriers ( 12 , 14 ) relative to one another, limiting means ( 30 , 32 ) defining the operative range of displacement of the carriers ( 12 , 14 ) in maintaining the crossover relationship between the sharpening strips ( 16 . 1 ), and carrier movement non-interference guiding means ( 18 , 20 ) defining a linear oath of blade traversal extending along the plane of movement of the sharpening strip crossover point ( 28 ), characterised by the guiding means ( 18 , 20 ) defining in association with the route of crossover point displacement, as in turn associated with appropriate displacement of the carriers ( 12 , 14 ) and that is brought about by the manually controlled displacement of a blade along the path of blade traversal once the sharpener ( 10 ) is in use, a blade sharpening path that extends from a point of blade insertion ( 34 ) associated with the inter-strip commencement crossover point, to a location associated with the end of the range of displacement of the carriers ( 12 , 14 ) remote from the inter-strip commencement crossover point defining location, the sharpener ( 10 ) consequently at least enabling the precision sharpening of the cutting edge of such blade as formed at the confluence of its cutting faces, according to the sharpening angle ( 17 ), by way of the performance of a conventional reciprocating cyclic blade sharpening action along the blade sharpening path as thus involving the associated reciprocating cyclic movement of the crossover point ( 28 ).