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:
Sep. 19, 1978
Filed:
Apr. 06, 1977
Larry James Joslyn, Walworth, NY (US);
Sybron Corporation, Rochester, NY (US);
Abstract
Air indicating device for use in steam or gas sterilizers and the like includes an upright tube placed in the sterilizer. The tube is open at its bottom to the sterilizing chamber and is closed at its top. A heat sink within the tube causes steam entering the tube to condense with a resulting accumulation of air in the top of the tube. The air accumulation acts as a barrier preventing further steam from reaching the upper portion of the tube. A temperature sensitive indicator strip extending axially into the tube changes color responsive to temperature. The air barrier is also an insulator so that the color of the indicator is a record of the temperature gradient from the top to the bottom of the tube, the temperature, in turn, being a measure of the amount of air trapped in the tube.