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:
Nov. 08, 2011
Filed:
Aug. 07, 2009
Kim Y.c. Tsai, Taichung County, TW;
Cheng-i Teng, Taichung County, TW;
Jeng-da Tsai, Taichung County, TW;
Kim Y.C. Tsai, Taichung County, TW;
Cheng-I Teng, Taichung County, TW;
Jeng-Da Tsai, Taichung County, TW;
Mobiletron Electronics Co., Ltd., Taichung County, TW;
Abstract
An impact drill includes a housing having an accommodation chamber and a through hole extending from the accommodation chamber to the outside space, a driving mechanism mounted in the accommodation chamber and having a transmission shaft positioned in the through hole for providing an output torque and producing an impact force intermittently upon a resistance, the transmission shaft having a polygonal front segment extending out of the accommodation chamber, and a chuck unit, which has a drill chuck that has a connection barrel defining a polygonal coupling hole that is press-fitted onto the polygonal front segment of the transmission shaft and a first bearing mounted on the connection barrel and received in the through hole to secure the drill chuck to the housing.