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:
Mar. 20, 1984
Filed:
Aug. 30, 1982
Applicant:
Inventor:
Billy J Battle, Birmingham, AL (US);
Assignee:
United States Pipe and Foundry Company, Birmingham, AL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
3317 / ;
Abstract
An apparatus for determining whether an approximately circular opening falls within predetermined dimensions. A flexible circular gauge comprises two resilient cylinders, one partially encased inside the other. The outer diameter of the smaller cylinder equals the minimum designed diameter of the opening. The thickness of the outer cylinder is equal to one-half the predetermined tolerance in variation in the dimensions of the opening, and the entire gauge is sufficiently flexible to follow the inside walls of the opening even though they may depart from a precise circle.