Patent ID: 8516783

Claim:
An apparatus for attachment to lawn mowing machines for use to edge and trim grass and weeds comprising: a gear assembly in a gear housing disposed in a blade housing with a driving gear attached to a drive shaft and engaged with a driven gear attached to a driven end of a shaft disposed in said blade housing; a shaft socket end of said shaft with a socket end having a detent therein, disposed in a side wall of the blade housing and said shaft attached to said blade housing by a first bracket with said shaft disposed approximately orthogonal to said drive shaft; a head coupling assembly comprising: a coupling shaft with a first portion having a trimmer head disposed thereon; a second portion of said coupling shaft has a trimmer bearing disposed thereon and a third portion of said coupling shaft with a closed end is shaped for insertion in said socket end; and a ball engagement apparatus having a ball movable between an engaged position to engage said detent in said socket end and a disengaged position to disengage said detent in said socket end, the ball engagement apparatus further comprising: an attachment shaft with a first groove spaced apart from a release pin end with a catch ring disposed in said first groove and with a second groove adjacent a locking end is slidably disposed in a coupling bore longitudinally formed in said coupling shaft with a first end open and said second end closed for said catch ring to be disposed in a catch ring bore formed in said coupling bore; a wall of said third portion of said coupling shaft having a ball lock hole therein with said ball disposed in said ball lock hole and retained by a lock ring disposed in a lock groove to allow a portion of said ball to protrude outwardly of said ball lock hole; and a spring disposed in said coupling bore between said locking end of said attachment shaft and said closed end of said coupling shaft.