Adapter for screwdriver having elastic retainer ring

Details Adapter for screwdriver having elastic retainer ring Adapter for screwdriver having elastic retainer ring

2005-01-11

2005-01-11

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C081S177850

Reexamination Certificate

active

06840143

ABSTRACT:
An adapter of screwdriver for coupling with screwdriver bits and the likes and generally comprising a sleeve, a slide ring, a spring and a retainer ring. The slide ring is a column member interiorly defined with a multi-stage hole, at the front of which is provided with a cone inner ring having increased cone ratio, a secondary inner ring and a big inner ring in turn, the sleeve has a hexagonal socket hole formed at the front end thereof and at the same an annular groove is defined for engaging with a C-shape ring, the retainer ring, the C-shape ring, the spring and a ring are mounted to a assembling diameter of the sleeve, which is characterized in: at the outer periphery of the assembling diameter of the sleeve thereof a hole is defined for the passage of the downward flange, through which, the downward flange is able to engage in the retainer groove of the screwdriver bit.

REFERENCES:
patent: 4589308 (1986-05-01), Palm
patent: 5309798 (1994-05-01), Markwart et al.
patent: 5333523 (1994-08-01), Palm
patent: 5481949 (1996-01-01), Yen
patent: 5528963 (1996-06-01), Wei
patent: 5533429 (1996-07-01), Kozak
patent: 5881614 (1999-03-01), Cheng-Tsan
patent: 5934384 (1999-08-01), Wang
patent: 6267031 (2001-07-01), Cheng
patent: 20020134205 (2002-09-01), Hsu

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