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. 04, 2018
Filed:
Jan. 27, 2016
Thk Co., Ltd., Tokyo, JP;
Futoshi Nakamura, Tokyo, JP;
Tetsuhiro Nishide, Tokyo, JP;
Yuji Kubota, Tokyo, JP;
Tsutomu Togashi, Tokyo, JP;
THK CO., LTD., Tokyo, JP;
Abstract
A disclosed screw device provides an allowance for the accuracy of a recess in an end surface of a nut. A nut has a communicating hole communicating in an axial direction, and is provided at an axial end surface of the nut with a recess communicating with the communicating hole. A circulation member including a turn-around path is placed in the recess. When the circulation member is placed in the recess, the turn-around path of the circulation member is linked to a loaded rolling element rolling groove and the communicating hole of the nut to form a circulation path of a rolling element. A clearance between the circulation member and a wall surface of the recess permits the circulation member to move. The circulation member placed in the recess is not fixed in the recess, and is covered with a lid member to be attached to the nut.