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. 19, 1991
Filed:
Mar. 09, 1990
Peter Juodikis, Chicago, IL (US);
Clifford C Johnson, Arlington Heights, IL (US);
Theodore Christie, Evanston, IL (US);
Precision Scientific, Inc., Chicago, IL (US);
Abstract
Apparatus for measuring the vapor pressure of a volatile liquid includes one or more cylindrical test chambers immersed in a constant temperature water bath. Each test chamber includes connected liquid and vapor compartments, with the vapor compartment coupled to a pressure transducer and display arrangement. The test chambers are mounted to a movable tray in the constant temperature water bath. An eccentric drive assembly driven by the combination of a motor and gear box is coupled to the tray for linearly displacing the tray and test chambers in a reciprocating manner until a constant pressure is observed on the pressure display.