The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 2007
Filed:
Mar. 27, 2003
Katsuyuki Totsu, Tokyo, JP;
Katsuyuki Totsu, Tokyo, JP;
Other;
Abstract
A screw holding screwdriver bit capable of effectively preventing a come-out from occurring by improving the structure of the blade portions thereof, capable of being manufactured in a simple structure at a low cost, and capable of remarkably increasing a working efficiency by allowing an appropriate and rapid screw tightening operation at all times, and the combination thereof with screws, the driver bit including a plurality of blade portions () having generally vertical end edge portions () formed at the tip ends () thereof, wherein one of the blade portions () is cut out in the axial direction of the bit, a guide passage () of a specified length is provided in a shaft () portion continued generally on the extension of the cutout portion () of the blade portion, and an elastic piece () allowed to elastically abut on a bit engagement groove in a screw head and having a screw holding function by the interaction thereof with the blade portion fitted in the bit engagement groove is inserted in the guide passage.