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:
Apr. 02, 2013
Filed:
Oct. 27, 2005
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
The present invention provides a screw device enabling insulation of sounds occurring from the inside of the screw device when circulating rolling elements. The screw device includes: a screw shafthaving a spiral rolling-element rolling grooveon an outer circumferential surface; a nut bodyhaving a spiral loaded rolling-element rolling grooveon an inner circumferential surface to oppose the rolling-element rolling grooveof the screw shaftand having therein a rolling-element returning passageto return rolling elementsrolling in a loaded rolling-element rolling passageformed between the loaded rolling-element rolling grooveand the rolling-element rolling grooveof the screw shaft; a circulation memberattached to an end face of the nut bodyand provided with a direction changing passageto connect the loaded rolling-element rolling passageand the rolling-element returning passage; and a sound insulating memberattached to the nut bodyto which the circulation memberis attached and formed to have an inner circumferential surface coming into contact with the screw shaft and to cover the circulation member