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:
Oct. 08, 1991
Filed:
Sep. 04, 1990
Applicant:
Inventors:
Keith Pratt, Hartland, MI (US);
Duane D Muelling, Milford, MI (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
73149 ;
Abstract
The present invention provides for an acoustical volumetric measuring apparatus which utilizes a variable volume standard cavity. The variable volume standard cavity is preferably formed of a threaded two-piece cylinder which changes volume upon rotation of one piece relative to other. Further, the variable volume standard cavity is calibrated to externally display the current volume setting. This allows for simplified comparisons in determining the volume of an unknown cavity. The simplified comparisons allow for less expensive components to be utilized.