Driving bit linking device in a box wrench

Details Driving bit linking device in a box wrench Driving bit linking device in a box wrench

2007-01-09

2007-01-09

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C081S177850

Reexamination Certificate

active

11289585

ABSTRACT:
A driving bit linking device in a box wrench includes a box wrench on a handle having a central bore, a pair of checking slots of different level in the opposing middle peripheries, an annular collar on a lower periphery and an annular groove in an upper periphery for disposing a retaining ring, a bottom spring disposed in the circular section of the central bore, a pair of compression springs wrapped on the outer periphery each including a transverse checking rod respectively inserted into the hexagonal section of the central bore through the checking slots and a cap wrapped on the box wrench and secured by the retaining ring. It is characterized that this device is capable of linking up a C type bit, a E type bit and even a double tips bit.

REFERENCES:
patent: 6199872 (2001-03-01), Hasan
patent: 6354177 (2002-03-01), Peters
patent: 6622597 (2003-09-01), Chen
patent: 6644150 (2003-11-01), Chen
patent: 6840143 (2005-01-01), Lin
patent: 6973858 (2005-12-01), Huang
patent: 7111530 (2006-09-01), Huang
patent: 2003/0097914 (2003-05-01), Hu

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