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:
Aug. 15, 1995
Filed:
Sep. 13, 1993
Timothy M Davidson, Alta Loma, CA (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
A flow cell and probe member apparatus for a spectrophotometer type analyzer for fluids such as petroleum fuel blends using the absorbance characteristics of electromagnetic radiation in the ultra violet/visible light/near infrared portion of the spectrum includes a body having opposed branch parts which define a flow passage for the fluid to be analyzed and including opposed connector parts for connecting the body to fluid transmitting conduits. Opposed waveguide probes project into the flow path from opposed supporting branch parts of the cell body which have opposed surfaces which are spaced apart at a predetermined distance to locate the probe members in such a way that the transmission path length of the radiation signal is closely controlled to minimize errors in the absorbance readings. Each of the probe members includes a waveguide portion including a light transmitting window having a self-cleaning surface formed thereon which is held a predetermined distance from a surface on the probe member body which is engageable with the locating surface on the cell body.