Adapter coupling device

Details Adapter coupling device Adapter coupling device

2007-02-08

2008-11-11

Shakeri, Hadi (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C279S075000, C081S177850

Reexamination Certificate

active

07448302

ABSTRACT:
An adapter coupling device includes an adapter wrapped byan outer sleeve and biased by a large spring. The adapter has a polygonal recess in the upper portion, a circular recess under the polygonal recess for receiving a positioning block which is biased by a small spring, two pairs of the first and second radial through hole in upper and lower peripheries for engaging with two pairs of steel balls. The outer sleeve has an introrse upper portion which has an asymptotic inner wall, an annular groove in a middle inner wall and an annular flange on lower end, a screwdriver inserted into the polygonal recess of the adapter has a hexagon shank, a rhombic notch in each of the corners of the shank, when inserting the screwdriver into the adapter, the asymptotic wall of the sleeve is functioned to press the steel balls in the first radial through holes engaging within the rhombic notches of the shank so that the screwdriver is checked.

REFERENCES:
patent: 4828277 (1989-05-01), De Bastiani et al.
patent: 5934384 (1999-08-01), Wang
patent: 6270085 (2001-08-01), Chen et al.
patent: 6325393 (2001-12-01), Chen et al.
patent: 6637755 (2003-10-01), Chen et al.
patent: 6973858 (2005-12-01), Huang
patent: 7159493 (2007-01-01), Huang

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