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. 23, 1991
Filed:
Oct. 24, 1989
Hans Oberdorfer, Stuttgart, DE;
Hansa Metallwerke AG, Stuttgart, DE;
Abstract
A pipe interrupter, which is particularly suitable for installation in a sanitary fitting, comprises in a housing a chamber, into which a water inlet pipe, a water outlet pipe and a ventilating passage open. A resilient closing flap comprises an attachment section as well as a closing section connected thereto in the manner of a hinge. Normally, as long as reduced pressure does not prevail in the inlet pipe, the closing section covers the opening aperture of the ventilation passage into the chamber, so that on the one hand no atmospheric air may enter and on the other hand no water may emerge. However, if a reduced pressure occurs in the pipe system, which is connected to the inlet pipe, then the closing section of the closing flap tilts by a certain angle, until it closes off the opening point of the inlet pipe into the chamber and on the other hand opens the ventilation passage to the chamber. In this way, water can no longer flow back into the inlet pipe and to the pipe system connected thereto; on the other hand, the waterways connected after the chamber are ventilated. Sucking-back of contaminated water into the drinking water system, which is connected to the inlet pipe, is thus reliably prevented. The dimensions of the pipe interrupter are small so that it can be located in particular in the base region of known sanitary fittings. (FIG. 1)