Opener providing large arm of force

Details Opener providing large arm of force Opener providing large arm of force

2006-05-09

2006-05-09

Wilson, Lee D. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S061000

Reexamination Certificate

active

07040197

ABSTRACT:
An opener comprises a holding portion; a front end of the holding portion being installed with a screwing portion; a rear end of the holding portion being installed with a rotation portion; a front end of the screwing portion being installed with an opener head; a rear end of the rotation portion being installed with a connecting hole for receiving a tool so as to provide a longer arm of force to have a larger torque, thus the user can moving a screwing element easily by using the opener. A section of the rotation portion is received into the holding portion; the section of the rotation portion is installed with at least one buckling ring for enhancing the engagement of the rotation portion with the holding portion. A front end of the portion of the rotation portion has a connecting sleeve; the screwing portion is tightly received into the connecting sleeve.

REFERENCES:
patent: 2620001 (1952-12-01), Fratz et al.
patent: 2621688 (1952-12-01), Wales
patent: 3438413 (1969-04-01), Borah
patent: 3475999 (1969-11-01), Roberts et al.
patent: 4007651 (1977-02-01), Scott
patent: 4206794 (1980-06-01), Reese
patent: 4212336 (1980-07-01), Smith
patent: 5152196 (1992-10-01), Garrett
patent: 6116123 (2000-09-01), Chen

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