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:
Feb. 07, 2023
Filed:
Nov. 19, 2019
Applicant:
Houghton Technical Corp., Wilmington, DE (US);
Inventors:
Alan E. Cross, Yardley, PA (US);
John M. Burke, Kirtland, PA (US);
Assignee:
HOUGHTON TECHNICAL CORP., Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01F 1/74 (2006.01); F16K 7/04 (2006.01); G01N 21/41 (2006.01);
U.S. Cl.
CPC ...
G01F 1/74 (2013.01); F16K 7/045 (2013.01); G01N 21/4133 (2013.01);
Abstract
An instrument incorporating a refractometer for measuring parameters of a fluid such as a metalworking fluid, avoids impairment of measurement accuracy due to contact of entrained air and oil with a refractometer window by temporarily interrupting the flow of the fluid through a refractometer chamber and orienting the window so that air and oil will readily separate from the window during the interruption of flow. Continued flow of metalworking flow while refractive index measurements are taken can be achieved by the use of by-pass valving arrangements.