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. 14, 1979
Filed:
Nov. 11, 1977
Jack H Young, Cambridge Springs, PA (US);
Frank E Halleck, Erie, PA (US);
American Sterilizer Company, Erie, PA (US);
Abstract
Methods and apparatus for steam sterilization in which goods are conditioned by removing air and heating to a desired temperature in a sealable chamber. Pressure change in the chamber is monitored and employed to control conditioning. The goods are subjected to a plurality of controlled cyclic pressure pulses below a predetermined supra-atmospheric pressure level by alternate evacuation and vapor pressurization of the chamber. The cyclic pressure pulsing is made responsive to load characteristics which are determined by monitoring pressure change in the chamber. In a specific embodiment, air is flushed from the chamber initially by the injection of steam simultaneously with evacuation; the evacuation phase of each pulse continues until both a predetermined time has lapsed and a predetermined vacuum level has been attained; and, the steam pressurization phase of each pulse is continued until a fixed pressure related to sterilization temperature is reached.