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:
Sep. 09, 2008
Filed:
May. 09, 2005
Yoshiharu Kitamura, Komagane, JP;
Takashi Ogino, Komagane, JP;
Yoshihiro Hemmi, Komagane, JP;
NHK Spring Co., Ltd., , JP;
Abstract
A facilitated tightening device allowing a bolt to be inserted smoothly by preventing a screw block engaged with the bolt from being inclined or falling down, comprising a base () having a bolt-insertion hole () partly forming a bolt-receiving face () and a slope portion () gradually decreasing in radius toward the insertion side of the bolt () in a manner so as to match the bolt-insertion hole () formed therein, a running screw () slid along the slope portion () as a result of the axial movement of the inserted bolt () to be engaged with the bolt (), a spring piece () that presses the running screw () in the downward, in the diameter-reducing direction of the running screw (), and guide projections () that engage with the running screw () so as to prevent the screw block () from falling down into the base (). Also, a groove for the running screwis formed in the baseso as to prevent said running screwfrom wobbling in the circumferential direction.