Patent ID: 6065214
Filing Date: 2000-05-23
Classification: A01D

Abstract:
A portable trimmer, comprising:a supporting tube;a cutter assembly mounted on said supporting tube at a front end thereof and having a rotary cutter blade mounted thereon;a braking assembly for preventing said rotary cutter from rotating;an anti-rotation device for preventing said rotary cutter from rotating during removal or installation of said rotary cutter;said cutter assembly having a gear case fixed to said supporting tube at said front end thereof, a rotatable cutter support shaft accommodated within said gear case, a circular plate-like cutter blade retainer which rotates with said rotatable cutter support shaft, said rotary cutter blade being detachably mounted on said rotatable shaft, and a fastener which threadably engages with a threaded portion circumferentially formed at an end portion of said rotatable cutter support shaft for attaching said rotary cutter blade to said cutter blade retainer;said rotatable cutter blade retainer including a cylindrical brake drum portion, said braking assembly including a support shaft positioned internally of said cylindrical brake drum portion and a brake shoe having a first end and a second end and being pivotally supported at said first end by said support shaft in location inwardly of said cylindrical brake drum portion; and;said ant-rotation device being provided in a vacant space within the confines of the cylindrical brake drum portion.