Patent ID: 8069758

Claim:
A head section for a rotary cutting device comprising: a body portion; a blade passage extending through said body portion from a blade entrance opening to a blade install position; a blade fastening mechanism having a blade engaging member pivotally movable between a first position and a second position, said blade engaging member biased by a biasing mechanism into the second position such that the blade engaging member extends across said blade passage at said blade install position, said blade engaging member being movable against such bias to clear said blade passage; a blade having a mount aperture proximate an insertion end thereof, wherein said blade is secured to said body portion when said mount aperture occupies said blade install position and said blade engaging member extends through said mount aperture; and wherein said blade is secured to said body portion by inserting said insertion end of said blade into said blade entrance opening and advancing said mount aperture through said blade passage toward said blade install position such that said insertion end contacts said blade engaging member and moves said blade engaging member to said first position to clear said blade passage, said blade engaging member having a longitudinal axis, and when in said first position, said blade engaging member is disposed in a recess in said body portion and said longitudinal axis is oriented substantially parallel to a longitudinal axis of said blade.