Ratcheting screwdriver

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5535648
SERIAL NO

08394490

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A ratcheting screwdriver is operable in reverse ratcheting, forward ratcheting and locked non-ratcheting modes. The screwdriver includes a rotatable handle having along an end thereof a substantially cylindrical interior wall defining an annular base surface and an axial bore. The base surface includes two substantially arcuate grooves formed therein which communicate with the bore. An insert is received in the bore and includes longitudinally extending teeth equiangularly spaced around the outer periphery thereof. First and second balls are respectively positioned in the arcuate grooves and urged against the insert by first and second compression springs, respectively. In the locked mode, the first and second balls are wedged against teeth on the insert to prevent ratcheting of the handle relative to a bit regardless of direction of handle rotation. In each of reverse and forward ratcheting modes, a corresponding one of the balls is urged away from its wedged engagement with the teeth on the insert, to provide ratcheting of the bit in the associated direction of handle rotation, and rotation of the bit together with the handle in the opposite direction. In a second related embodiment, a left-right pawl/torsion spring assembly is used in place of the ball/compression spring assembly.

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Patent Owner(s)

Patent OwnerAddress
SNAP-ON TOOLS WORLDWIDE INCONE SUN PARKWAY CRYSTAL LAKE IL 60014

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Braun, John A Kenilworth, NJ 6 137
Occidentale, Frank Elmwood Park, NJ 3 168

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