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:
May. 31, 2011
Filed:
Jul. 07, 2010
Tatsuki Nakayama, Kure, JP;
Hideki Shindo, Kure, JP;
Tatsuki Nakayama, Kure, JP;
Hideki Shindo, Kure, JP;
Mitutoyo Corporation, Kawsaki-shi, JP;
Abstract
A roundness measuring apparatus includes: a stylus having a contact part; a holding member that holds the stylus while allowing displacement of the contact part; an elastic member that presses the contact part against a measurement target object; a detector holder that supports the holding member rotatably; a motor; an elastic force adjustment member that is rotatable and concentric with the holding member; a joining section that joins the elastic force adjustment member with the holding member to maintain relative rotational positions; and a restricting section that restricts rotation of the elastic force adjustment member at a predetermined rotational position. The displacement direction of the contact part is adjusted in a first rotation range. The rotational position of the holding member relative to the rotational position of the elastic force adjustment member changes with the rotation of the elastic force adjustment member being restricted in a second rotation range.