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. 19, 2016
Filed:
Oct. 20, 2011
Yoshihito Watanabe, Tokyo, JP;
Hidenori Kida, Tokyo, JP;
Shigeki Nakaminami, Tokyo, JP;
Hisaya Tanaka, Tokyo, JP;
Yoshihito Watanabe, Tokyo, JP;
Hidenori Kida, Tokyo, JP;
Shigeki Nakaminami, Tokyo, JP;
Hisaya Tanaka, Tokyo, JP;
THK CO., LTD., Tokyo, JP;
ASEISMIC DEVICES CO., LTD., Tokyo, JP;
Abstract
The screw motion mechanism includes: a threaded shaft having an outer peripheral surface provided with a helical thread groove, the threaded shaft having at least one axial end coupled to a first structural body; a nut member held in a rotatable manner with respect to a second structural body which is movable in an axial direction of the threaded shaft with respect to the first structural body, the nut member being threadedly engaged with the threaded shaft; and a spherical joint for coupling the at least one axial end of the threaded shaft to the first structural body, the spherical joint including: a spherical portion; and a sphere receiving portion for housing the spherical portion. When assuming an axial force applied to the threaded shaft as a variable, a line of a rotational torque intersects with a line of a sliding torque in a graph.