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. 10, 1981
Filed:
May. 25, 1979
Pieter Bearda, Turgi, CH;
BBC Brown Boveri & Company Limited, Baden, CH;
Abstract
The invention relates to an apparatus for sterilizing liquids by means of ultraviolet rays, using as the radiation source a low pressure, high current, mercury vapor lamp (UV lamp) which is provided with an appendix-shaped piece of tube (appendix) located on the discharge tube. In order to be able to regulate the temperature of the appendix in a defined manner even while the lamp is in operation and in order to achieve longer life of the UV lamp, an airstream circulating through the apparatus is used to cool the UV lamp. This airstream follows a path such that the air warmed on the discharge tube travels past the electrode bulbs of the UV lamp to the outer wall of the pipeline, through which pipeline the liquid to be sterilized flows. The air which has cooled on the outer wall of the pipeline is then returned to the UV lamp and must be at a temperature which is lower than the operating temperature of the appendix, so that the temperature of the latter can be regulated in a defined manner by means of a heater.