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:
May. 13, 2014
Filed:
Apr. 17, 2008
Hideyuki Tanimoto, Ibaraki, JP;
Hiroyuki Oda, Ibaraki, JP;
Yoshihiro Nakano, Ibaraki, JP;
Takashi Ueda, Ibaraki, JP;
Hideyuki Tanimoto, Ibaraki, JP;
Hiroyuki Oda, Ibaraki, JP;
Yoshihiro Nakano, Ibaraki, JP;
Takashi Ueda, Ibaraki, JP;
Hitachi Koki Co., Ltd., Tokyo, JP;
Abstract
According to an aspect of the present invention, there is provided a nailing machine including: a housing; a motor that is accommodated in the housing; a plunger that plunges a nailing member; and a spring that is expanded or compressed by the motor to store an elastic energy therein and that accelerates the plunger by releasing the elastic energy, wherein a spring constant of the spring at one end of the spring in an expanding/compressing direction is set smaller than that of the spring at a center in the expanding/compressing direction.