Robert B Mackey

US Patent:

53984161, Mar 21, 1995

Filed:

Jan 3, 1994

Appl. No.:

8/176749

Inventors:

Robert T. Mackey - Ashland City TN

International Classification:

A01D 3463

US Classification:

30347

Abstract:

My invention is a replacement head for string trimmers and includes a block, the block being constructed of metal or alloy having the characteristics of strength, rigidity and generally having a hardness to withstand the abuse received by the rotating element of a string trimmer. The block is preferably of a cylindrical shape being essentially a solid piece with a flat top and bottom, the top and bottom of the block having planes essentially parallel to each other. Cut into the top of the block is a counterbore which is internally threaded to be screwed onto the threaded sinaft of the string trimmer. At or near the bottom of the block are two channels, each passing through tile block, the channels being essentially in a stacked relationship mid generally extending perpendicularly to each other. A monofilament string of a defined length is threaded through one channel, wound about the outer peripheral of the block to an opening of the second channel and passed through the second channel, wound about the outer peripheral of the block to the opening of the first channel and pass through the first channel a second time. Each end of the monofilament is then pulled tightly so that two ends of the monofilament extend from the block and the monofilament is tightly connected to the block.