Extension tool having anchoring device

Details Extension tool having anchoring device Extension tool having anchoring device

2005-12-20

2005-12-20

Hail, III, Joseph J. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle or shank

C081S177100, C081S177900, C081S177850, C081S177750

Reexamination Certificate

active

06976411

ABSTRACT:
An extension tool includes a shaft having an annular groove and an orifice and an aperture formed in a front portion, to receive a retaining ring and a ball and an insert. A stem is slidably engaged into the shaft and includes a number of depressions for selectively receiving the ball, and for adjustably securing the stem to the shaft. A control ferrule is engaged onto the shaft, and has a protrusion biased to force the ball to engage into either of the depressions of the stem. A spring-biased projection is attached to a rear portion of the stem, and has a detent movable to engage into the aperture of the shaft, to lock the stem to the shaft, and to prevent the stem from being disengaged from the shaft inadvertently.

REFERENCES:
patent: 6044733 (2000-04-01), Liu
patent: 6260452 (2001-07-01), Yu

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