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A screw feed and driver assembly which may constitute a part of a screw driving tool of the type having a prime mover, a speed and torque determining gear assembly and a clutch; which can constitute an accessory for a clutch containing manual feed power screw driver; and which, combined with a clutc

A screw feed and driver assembly which may constitute a part of a screw driving tool of the type having a prime mover, a speed and torque determining gear assembly and a clutch; which can constitute an accessory for a clutch containing manual feed power screw driver; and which, combined with a clutch, can comprise an accessory for a standard manual power drill. The screw feed and driver assembly comprises a feed housing with a slide body mounted therein and shiftable between forward and rearward positions. The slide body is biased to its forward position. The slide body receives a strip bearing screws. A contact foot is mounted on the slide body and shifts the slide body rearwardly when pressed against a workpiece. A screw driver, affixed to the clutch, extends into the slide body. The slide body contains a pawl and feed sprocket assembly. The sprocket engages notches in one edge of the screw bearing strip. When the slide body is shifted rearwardly by the contact foot, the pawl rotates the sprocket a predetermined amount to advance the forwardmost screw of the strip to a driving position. Further rearward movement of the slide body engages a driver with the forwardmost screw and thereafter actuates the clutch to drive the forwardmost screw. The mounting of the contact foot on the slide body can be adjusted to accommodate different length screws. An adjustable stop block determines the rearwardmost position of the slide body and the depth to which the screws are driven. An improved clutch mechanism substantially eliminates clutch chatter.

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[ What is claimed:] [1.] A screw feed and driver assembly which constitutes a part of a screw driving tool of the type having a prime mover, a speed and torque determining gear assembly and a clutch, which constitutes an accessory for a clutch containing manual feed powered screw driver, and which,

[ What is claimed:] [1.] A screw feed and driver assembly which constitutes a part of a screw driving tool of the type having a prime mover, a speed and torque determining gear assembly and a clutch, which constitutes an accessory for a clutch containing manual feed powered screw driver, and which, combined with a clutch, comprises an accessory for a standard power drill, said screw feed and driver assembly comprising an elongated hollow feed housing, a slide body mounted in said feed housing and being slidable therein between forward and rearward positions, said slide body biased to said forward position, said slide body having a transverse channel to receive and guide a screw bearing strip having notches on at least one of its longitudinal edges, a workpiece contact foot mounted on said slide body and being configured to shift said slide body rearwardly when pressed against a workpiece, a clutch mounted screw driver extending longitudinally into said slide body, and a feed sprocket and feed pawl assembly actuable by rearward movement of said slide body to incrementally advance said strip, aligning a screw with said driver to be driven thereby upon further rearward movement of said slide body, with said feed sprocket and feed pawl assembly comprising a feed sprocket having a plurality of teeth evenly spaced about the peripheral edge of said feed sprocket, with each adjacent pair of teeth being separated by an arcuate edge portion and a notched edge portion. [35.] A clutch comprising a clutch driving member, a clutch driven member, a clutch spring and a clutch output shaft, said driving member comprising a cylindrical member terminating in forward and rearward ends, said forward end comprising a driving face, a plurality of radial drive lugs on said driving face, said driving member having a central bore extending from said driving face to a larger coaxial socket extending through said rearward end and configured to non-rotatively receive the output shaft of a drive means, said cylindrical driving member having an annular exterior flange near said driving face, said driven clutch member comprising a cylindrical body having forward and rearward ends, an axial bore passing through said driven member, said rearward end of said driven member having a plurality of evenly spaced radial drive lugs, an annular exterior flange surrounding said driven member, a pair of diametrically opposed slots formed in said axial bore and open at said forward end of said driven member, said clutch output shaft comprising a forward portion and a rearward portion with an annular flange therebetween, said forward portion having a socket formed therein to receive a member to be driven by said clutch, said rearward portion of said output shaft being of a diameter to be received in said driven member axial bore and in said driving member axial bore, a pair of diametrically opposed lugs formed on said rearward shaft portion and receivable in said driven member slots, said driving member being mounted on said rearward portion adjacent said output shaft annular flange with said output lugs received in said driven member slots, said clutch spring comprising a compression spring located between said driving and driven members, said spring having ends seated on said driving member exterior flange and said driven member exterior flange, said clutch spring urging said drive member drive lugs away from said driven member drive lugs, said slots and said lugs being so configured that when said driving member is rotated and caused to be approached by said driven member against the action of said clutch spring, said slots and lugs interact to shift the driving lugs of said driven member into instant positive driving engagement with no chatter and at the end of the driving operation the slots and lugs will cooperate to shift the driven member driving lugs instantly out of engagement with the driving member driving lugs without chatter.