Patent ID: 7165305

Claim:
A method for assembling an activation arm assembly for use in a power tool with a flywheel and a driver, the method comprising: providing a first arm, a second arm and a third arm, each of the first and second arms having a pair of laterally spaced apart arm members, the third arm including a first eccentric and a second eccentric, each of the first and second eccentrics including a pin portion; coupling a follower to the first eccentric; providing a yoke with a cross-bar portion; coupling the cross-bar portion to the pin portion of the first eccentric such that the yoke is rotatable about the pin portion of the first eccentric; coupling the second eccentric to the cross-bar portion and the follower to form a subassembly; pivotally coupling the subassembly to the second arm; placing a spring proximate the yoke; engaging a spacer to the arm members of the second arm, the spacer abutting and compressing the spring such that the spring biases the cross-bar portion away from the spacer; installing a pivot pin through the first and second arms; loading a second spring to the first arm; and rotating the second arm about the pivot pin to load the second spring.