Length-adjustable screwdriver

Details Length-adjustable screwdriver Length-adjustable screwdriver

1997-06-25

1998-11-17

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81438, 811772, B25B 1348

Patent

active

058362231

ABSTRACT:
A length-adjustable screwdriver including a handle having a polygonal center hole, a polygonal tube slidably mounted in the polygonal center hole of the handle, a collar block controlled by a chuck to lock the polygonal tube at the desired location, a shaft mounted in the polygonal tube and having a magnet at its front end adapted for securing a tool bit at the front end of the polygonal tube by magnetic attraction, and a sleeve slidably sleeved onto the polygonal tube, the sleeve having a spring-supported ball forced into engagement with one of a longitudinal series of locating holes of the polygonal tube to secure the sleeve at the desired location and a polygonal center through hole adapted for holding a tool bit when the front end of the sleeve protrudes over the front end of the polygonal tube.

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