Patent ID: 7200941

Claim:
A chainsaw comprising: a brake drum; a saw bar; a saw chain disposed about said saw bar, wherein said brake drum rotates as said saw chain is advanced about said saw bar, and preventing said brake drum from rotating prevents said saw chain from advancing about said saw bar; a brake band disposed around said brake drum and having a first movable end that is associated with a first biasing member and a second movable end that is biased by a second biasing member to draw said brake band against said brake drum and thereby prevent the rotation of said brake drum; a throttle control trigger movable between an off throttle position and an on throttle positions; an actuator bar secured to pivot about a pivot point; and a cable secured at one end to move with said throttle control trigger and secured at an opposed end to said actuator bar, said second movable end of said brake band being positioned in close proximity to said actuator bar, wherein, when said throttle control trigger is moved from said off throttle position to said on throttle position, said cable pulls on said actuator bar so that said actuator bar pivots about said pivot point and contacts and moves said second movable end against said second biasing member, thereby loosening said brake band from said brake drum and permitting the rotation of said brake drum, and, when said throttle control trigger is moved from said on throttle position to said off throttle position, said second movable end is moved by said second biasing member to draw said brake band against said brake drum and thereby prevent the rotation of said brake drum.