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:
Oct. 07, 1997
Filed:
Mar. 26, 1996
Nobuyuki Yanagi, Niigata, JP;
Masato Yamauchi, Niigata, JP;
NEC Corporation, Tokyo, JP;
Abstract
A screwdriver has a plurality of driver pins or different kinds where the shapes of the point portions are different from one another, and connecting shafts connected to the driver pins through universal joints, respectively. The driver pins are provided with spline grooves. Actuating shafts are also connected to the connecting shafts through universal joints, respectively. These members are housed within a cover and are guided upward and downward through the interior walls of the cover. The respective actuating shafts are upwardly energized by springs. Only one of the second shafts is selected and pushed down against the energizing means by a solid cam. The cover is provided with a single hole at a bottom end of the cover, and the single hole allows only one of the driver pins to pass through. The surfaces of the single hole are provided with a spline which is engageable with the longitudinal spline grooves of each of the driver pins.