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:
Jul. 08, 1997
Filed:
Aug. 20, 1996
Henry Olin, Espoo, FI;
Evac AB, Bromolla, SE;
Abstract
A simplified vacuum sewer arrangement comprises a limited number of toilet bowls, preferably at the most 60 toilet bowls, which through a sewer pipe are connected to a common sewage collecting container, and a dry rotary vane pump for generating and maintaining a considerable partial vacuum in the sewer pipe and in the collecting container. The sewage collecting container is a relatively small reservoir which has to be frequently emptied and the volume of which is preferably at the most 100 liters. A liquid separator protects the pump from moisture. A rigidly installed tube and valve system connects the pressure side of the dry rotary vane pump periodically to the collecting container for emptying the container to another location by means of the pressure created by the dry rotary vane pump.