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. 25, 2003
Filed:
Apr. 21, 1999
Applicant:
Inventors:
Jay D. Stradinger, Roscoe, IL (US);
Mark A. Pondelick, Brodhead, WI (US);
Assignee:
Evac International Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65D 2/500 ;
U.S. Cl.
CPC ...
B65D 2/500 ;
Abstract
A vacuum waste tank for use in a vacuum drainage system. The tank has a vacuum intake for attachment to a vacuum source and a waste water intake for attachment to a vacuum pipe. The vacuum source creates a negative pressure in the tank and vacuum pipe so that liquid entering the pipe is pulled into the tank. The tank is made of a thermoplastic material having a flexural modulus sufficient to withstand an external pressure loading caused by the vacuum in the tank without buckling.