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:
Jan. 30, 2001
Filed:
Dec. 22, 1998
Applicant:
Inventor:
Satoshi Koga, Tsukuba, JP;
Assignee:
Mitutoyo Corporation, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B 3/00 ;
U.S. Cl.
CPC ...
G01B 3/00 ;
Abstract
An inside of a U-shaped frame of a micrometer is made of a material having a smaller linear thermal expansion coefficient than an outside of the U-shaped configuration. Furthermore, a spindle can be made of a material having an extremely small linear thermal expansion coefficient. Accordingly, thermal deformation of the micrometer can be made smaller, and measurement accuracy is maintained even under a widely changing temperature.