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. 11, 2011
Filed:
Feb. 07, 2007
Hidekazu Michioka, Tokyo, JP;
Hiroshi Niwa, Tokyo, JP;
Katsuya Iida, Tokyo, JP;
Yoshiaki Saitoh, Tokyo, JP;
Hidekazu Michioka, Tokyo, JP;
Hiroshi Niwa, Tokyo, JP;
Katsuya Iida, Tokyo, JP;
Yoshiaki Saitoh, Tokyo, JP;
THK Co., Ltd., Tokyo, JP;
Abstract
Provided is a screw device capable of reducing noise generated therefrom. The screw device has a screw shafthaving a rolling-element rolling groovespirally formed on an outer peripheral surface of the screw shaft; a nuthaving a loaded rolling-element rolling groovespirally formed on an inner peripheral surface of the nut and facing the rolling-element rolling grooveof the screw shaftand a rolling-element return path connecting an end of the loaded rolling-element rolling groovewith an other end thereof; and a plurality of rolling elementsarranged in a rolling-element circulation path. A low-noise plateis mounted on a flangeprovided at an axial end of the nutso that the low-noise platecovers at least a part of an end surface of the flange