Patent ID: 6241595
Filing Date: 2001-06-05
Classification: B24B

Abstract:
An apparatus for sharpening a rotating blade of a powered lawn edger, comprising:a trigger, said trigger connected to the handle of said edger via a clamp and located within convenient reach of the user for transmitting draft to a cable;a cable, said cable connected to said trigger for transmitting said user's draft on said trigger to the operating mechanism of said apparatus;an edger blade housing;a u-shaped plate, said u-shaped plate mounted to an outer sidewall of said edger housing via tabs;an arbor, said arbor mounted on and supported by said u-shaped plate via a bolt;a pair of caliper arms; said pair of caliper arms driven toward each other when said cable is pulled via said trigger;a cam, said cam rotatably supported by said arbor and designed to transmit and convert a linear motion of said cable to a rotary motion to create an opposed linear motion necessary to drive said pair of caliper arms;a pair of crank aims; said pair of crank arms for linking said caliper arms to said cam and wherein said pair of crank arms, said cam and said caliper arms are movably linked to each other via pins;a spring, said spring for biasing said cam in a clockwise direction keeping said caliper arms normally separated;a pair of sharpening pads, said pair of sharpening pads pivotally connected at the lower end of each of said caliper arm via bolts and a pair of tabs and wherein each sharpening pad has located on its inner side a sharpening stone; anda housing, said housing for enclosing said apparatus.