Patent ID: 6607111
Filing Date: 2003-08-19
Classification: B25C,H02P

Abstract:
A tool including apparatus for driving a movable work performing member of said tool, said tool comprising:a) an outer shell, b) a housing within said shell for containing therein the operating mechanism for driving said movable member, c) a motor affixed to said housing, d) a first end cam plate affixed to said housing, e) a central shaft having a first end thereof affixed to said first end cam plate and having its opposite second end supported by said housing, f) a second end cam plate rotatably received upon said central shaft, g) caming means between said first and second end cam plates whereby rotation of said second cam causes said second end cam plate to axially separate from said first end cam plate, h) a first actuation cam plate received upon said central shaft, said first actuation cam plate being axially slidable upon, and non-rotatable about said central shaft, i) a second actuation cam plate axially slidable upon and rotatable about said central shaft, j) caming means between said first and second actuation cam plates whereby rotation of said second actuation cam plate relative to said first actuation cam plate causes said first and second actuation cam plates to axially separate, k) first compressible spring means positioned between said second end cam plate and said first actuation cam plate, l) a tool activation drum coupled to said second activation cam plate, said activation drum rotatable and axially slidable upon said central shaft, said activation drum operatively connected to said movable member, such that rotation of said drum drives said tool's work performing member, m) a clutch plate rotatable and axially slidable upon said central shaft, said clutch plate coupled to said activation drum whereby said clutch plate, said activation drum and said second activation plate rotate about said central shaft as an assembly, n) a flywheel, drivingly connected to said motor, and rotatable about said central shaft, said flywheel positioned between said clutch and housing, o) second compressible spring means positioned between said flywheel and said clutch plate whereby said flywheel and said clutch plate are axially biased apart from one another, p) means for rotating said second end cam plate whereby axial movement of said second end cam plate away from said first end cam plate causing said clutch plate to axially translate toward and engage said flywheel thereby causing said clutch plate, said activation drum, and said second activation cam plate to rotate, as an assembly, in the direction of said flywheel rotation, thus causing said first and second activation cam plates to axially separate thereby compressing said first compression spring means whereby an additional axial force is imparted to said clutch plate.