Ratchet screwdriver with a quick retractable positioning joint

Details Ratchet screwdriver with a quick retractable positioning joint Ratchet screwdriver with a quick retractable positioning joint

2006-08-15

2006-08-15

Thomas, David B. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S177200

Reexamination Certificate

active

07089828

ABSTRACT:
A ratchet screwdriver apparatus has a main body, a tubular member connected into the hole of the grip of the main body, a retractable element having an end extending through a through hole of the tubular member, and a positioning mechanism cooperatively connecting the tubular member with the retractable element so as to cause the retractable element to be in a fixed position with respect to the tubular member and in freely movable relationship with the tubular member. The positioning mechanism has a pair of half-mould structures, a ball extending through a tapering slot of the tubular member, a single elastic ring extending around the periphery of the first and second half-mould structures and a control ring extending entirely over the elastic ring.

REFERENCES:
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patent: 1753441 (1930-04-01), Morehouse
patent: 2438633 (1948-03-01), Condor
patent: 2592978 (1952-04-01), Trimboli
patent: 2963930 (1960-12-01), Clothier et al.
patent: 4102375 (1978-07-01), Rossini
patent: 4586406 (1986-05-01), Howard
patent: 4703677 (1987-11-01), Rossini
patent: 4960015 (1990-10-01), Mathews
patent: 5836223 (1998-11-01), Lin
patent: 6148696 (2000-11-01), Chiang
patent: 6260452 (2001-07-01), Yu
patent: 6622597 (2003-09-01), Chen
patent: 6901826 (2005-06-01), Huang
patent: 2004/0173061 (2004-09-01), Liou

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