Slot-head fastener and driver therefor

DETAILED DESCRIPTION What is claimed is: 1.
A slot head fastener and driver therefor comprising: a slot head fastener having a threaded shank and a head, said head being polygonal in shape to have a plurality of flats and having a slot defined therein which is in the shape of an inverted T, said slot having a first section defined to extend transversely of said head and a throat section intersecting said first section, said throat section being defined by a pair of laterally spaced parallel side walls which are spaced apart to define a bit receiving gap therebetween, said slot and said throat having tapered portions to faclitate entrance and exit of a bit into said slot; and a driver for engaging said slot head fastener, said driver including a torquing member having a projecting driver member thereon, a handgrip member having an internal socket defined therein at one end thereof, said handgrip member being sized to be gripped by a user's hand with the user's other hand gripping said torquing member, said internal socket being shaped to receive said torquing member projecting driver member, a shank connected at one end thereof on another end of said handgrip member, a socket member mounted on said shank to be axially movable thereon and having a shape corresponding to the shape of said slot head fastener polygonal head to engage said flats to impart turning torque to said fastener, a spring mounted on said shank to yieldably bias said socket member toward another end of said shank, a bit on said shank another end, said bit including a rectangular portion sized to be received in said slot head fastener gap, and a projecting portion which is located and sized to be received in said head fastener first section, said bit portions forming a T-shaped member which is received in said slotted head fastener inverted T-shaped slot to form a driving connection between said driver and said fastener whereby torque developed by said driver is imparted to said fastener via said socket member and said bit