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:
Feb. 05, 1991
Filed:
Aug. 15, 1989
Ming-Tang Chen, Taichung, TW;
Other;
Abstract
A screw driver device having a replaceable driving head comprising a hollow driving rod which has a pistol-like handle and a clamper for clamping the driving head. A wheel is inserted into the pistol-like handle and which contains driving heads of several types and is turnable with outside force a light for illumination of the work site is provided. In use, it requires to revert the driving rod with its clamper facing upward and turn and wheel to search a suitable driving head and get it faced direct with a slideway in the driver rod and then revert back the driving rod; thus, the chosen driving head may disengage itself from the wheel by its own gravity or by a striker's striking force the head can run down the slideway to protrude from the clamper. Locking the clamper makes it ready for use.