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:
Nov. 18, 2003
Filed:
Mar. 25, 2002
Applicant:
Inventor:
Vesa Lappalainen, Vantaa, FI;
Assignee:
Evac International Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04F 3/00 ;
U.S. Cl.
CPC ...
F04F 3/00 ;
Abstract
A vacuum sewer system ( ) comprises a source of sewage ( ) and sewer piping ( ) comprising a first sewer pipe ( ) and a second sewer pipe ( ). A first sewer valve ( ) provided with an outlet port ( ) is arranged between the source of sewage ( ) and the first sewer pipe ( ) and a second sewer valve ( ) is arranged between the first sewer pipe ( ) and the second sewer pipe ( ), whereby the system comprises a vacuum generating means ( ) for providing vacuum in the sewer piping ( ). In order to minimize the noise level and the space requirement of the system the first sewer pipe ( ) provides an intermediate receptacle for the sewage.