Screwdriver structure

Details Screwdriver structure Screwdriver structure

2006-08-22

2006-08-22

Shakeri, Hadi (Department: 3723)

Tools

Handle for tool

Having cap or reinforcing means

C081S436000, C081S177500

Reexamination Certificate

active

07093524

ABSTRACT:
A screwdriver structure includes a handle having a projecting section at rear end, a circumference of the projecting section being formed with a predetermined number of holes extending into the interior of the projecting section; a stem disposed at front end of the handle; and a rotary cap having a cavity inward extending from a bottom end of the rotary cap, an outer circumference of the rotary cap being formed with several through holes communicating with the cavity. The rotary cap is rotatably disposed on the projecting section which is accommodated in the cavity with the through holes. When operating the screwdriver, the palm of a user's hand can attach to the rotary cap. When turning the rotary cap, at least one through holes is align with at least one holes. A rod can be inserted through the hole and the through hole to elongate the application force arm.

REFERENCES:
patent: 1469792 (1923-10-01), Johnson
patent: 2351705 (1944-06-01), Prall
patent: 2849041 (1958-08-01), Vetri
patent: 5590575 (1997-01-01), Ludy
patent: 5823078 (1998-10-01), Liu
patent: 6170123 (2001-01-01), Holland-Letz

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