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:
Apr. 22, 1980
Filed:
Jul. 19, 1978
William E Edstrom, Waterford, WI (US);
Other;
Abstract
A liquid isolator to prevent cross-contamination in the supply of liquid to and between animal racks. The isolator comprises cylindrical concentric tubes arranged to form a liquid storage chamber, a standpipe in the chamber, and a liquid entry tube within the standpipe. Near their upper ends, a liquid transfer port is provided between the standpipe chamber and the liquid storage chamber. An air lock is formed between the liquid transfer port and the level of any liquid in the storage chamber. The air lock isolates liquid in the standpipe chamber from the liquid in the storage chamber. Check valves are also provided in a liquid inlet at the top of the isolator and a liquid outlet at the bottom of the isolator, thus to prevent back flow through the isolator.