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:
Feb. 03, 2015
Filed:
Mar. 31, 2011
Vesa Lappalainen, Vantaa, FI;
Vesa Lappalainen, Vantaa, FI;
Evac International Oy, Espoo, FI;
Abstract
The invention relates to a liquid ring pump () for generating vacuum and for pumping a flow of sewage in a vacuum sewage system. The liquid ring pump comprises in the direction of the flow of sewage a pump inlet (), an inlet chamber (), a pump housing () provided with a rotor () arranged on a drive shaft () provided with a mechanical seal (), an outlet chamber (), and an pump outlet (). The mechanical seal () is arranged within the outlet chamber (). The outlet chamber () is provided with an integrated extension () providing an enlargement of the outlet chamber () in order to retain the flow of sewage in the outlet chamber () before it is discharged from the pump outlet () in order to improve the lubrication of the mechanical seal ().