Patent ID: 7476821

Claim:
A trigger mechanism for an electric power tool, comprising: a housing; a first spring; a trigger supported for movement relative to the housing between a foremost position and a rearmost position, the trigger being resiliently biased by a first spring towards the foremost position, and the rearmost position being adjustable; an adjuster for adjusting the rearmost position of the trigger; an electrical switch arranged for operation by the trigger, while the trigger is in an intermediate position, between the foremost and rearmost positions, and closing an electrical circuit; a variable circuit element arranged for operation by the trigger, while the trigger is in the intermediate position, to provide a parameter having a value dependent upon position of the trigger; and a locking device associated with the housing for locking the trigger near the rearmost position, movable in opposite directions and arranged to lock the trigger near the rearmost position when the locking device is moved in either of the opposite directions, and including distinct first and second members, the first member being movable in the opposite directions and the second member engaging to lock the trigger.