Patent ID: 8251156

Claim:
A power tool shifting mechanism comprising: a first member movable between first and second positions; a shifting member coupled to at least one drive member and moving between third and fourth positions in response to movement of the first member between the respective first and second positions, the at least one drive member moving with movement of the shifting member; and a compliant member coupled to the first member and to the shifting member, the compliant member causing the shifting member to move between the third and fourth positions in response to movement of the first member between the respective first and second positions, the compliant member applying a first force of a first magnitude on the shifting member that biases the shifting member toward the fourth position during a first portion of movement of the shifting member from the third position to the fourth position and applying a second force of a second magnitude on the shifting member that biases the shifting member toward the fourth position during a second portion of movement of the shifting member from the third position to the fourth position, the first and second magnitudes being different from one another; wherein the first member can move fully to the second position regardless of the shifting member moving fully into the fourth position.