Abrasive tool making process – material – or composition – Impregnating or coating an abrasive tool
Patent
1990-08-17
1991-04-23
Schmidt, Frederick R.
Abrasive tool making process, material, or composition
Impregnating or coating an abrasive tool
51221BS, 30138, 76 86, B24B 3300
Patent
active
050090402
ABSTRACT:
A blade sharpener having a sharpening mechanism which functions to sharpen a blade engaging that mechanism and being moved longitudinally relative thereto. The sharpener also includes sharpening defeating means which, when operative, at least inhibits and possibly prevents sharpening of a blade by the sharpening mechanism when that blade is moved longitudinally through the sharpener in one direction. The defeating means is responsive to blade movement so as to adopt an operative condition when the blade is moved in the aforementioned one direction, and to adopt an inoperative condition when the blade is moved through the sharpener in the opposite direction. The defeating means includes a blade engaging member such as a roller, and in the operative condition that roller engages and presses against the cutting edge of the blade so as to impose a force on the blade which acts counter to the force causing the blade to engage the sharpening mechanism. The counter force therefore tends to push the blade out of contact with the sharpening mechanism. The roller does not engage the blade, or at least does not apply the counter force, when the defeating means is in the inoperative condition. An anti-bottoming groove is provided around the circumferential surface of the roller to provide a location for the cutting edge of the knife blade and that groove is formed to avoid contact between the actual cutting edge of the blade and the base of the groove.
REFERENCES:
patent: 4494339 (1985-01-01), Pittaway
patent: 4669337 (1987-06-01), Petroff
patent: 4869027 (1989-09-01), McEvily
McPherson's Limited
Schmidt Frederick R.
Schwarzmann John R.
LandOfFree
Blade sharpener does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Blade sharpener, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Blade sharpener will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1613663