公开(公告)号：US06786806B2

公开(公告)日：2004-09-07

申请号：US10345982

申请日：2003-01-17

申请人： Harold D. Maus, Jr.

发明人： Harold D. Maus, Jr.

IPC分类号： B24B300

CPC分类号： B24B3/365 ,  Y10S269/902 ,  Y10T29/53961

摘要： A mower blade sharpener apparatus has an automatic reciprocating holder means to sharpen lawn mower blades conveniently with any stationary circular flat-faced grindstone with its driving motor affixed to a common base. A housing frame having open opposing sides contains a blade holder with upper and lower securing clamps and a V-shaped cradle. The housing frame is attached by a screw to a carriage automatically moved back and forth a limited distance on a pair of parallel rods to sharpen the lawn mower blade. The housing frame and carriage are driven by a pneumatic system designed with a reciprocating movement of approximately 4 inches in a cycle duration of approximately a second. An on/off pneumatic valve switch automatically shuts off the pneumatic pressure when a semicylindrical shield which covers the blade portion not being sharpened is rotated back away from the blade.