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. 14, 2017
Filed:
Oct. 07, 2011
Mark A. Luzbetak, Kildeer, IL (US);
Thomas A. Sutrina, Rockford, IL (US);
Erich Pfenniger, Ebikon, CH;
Patrik Bosshard, Buonas, CH;
Mark A. Luzbetak, Kildeer, IL (US);
Thomas A. Sutrina, Rockford, IL (US);
Erich Pfenniger, Ebikon, CH;
Patrik Bosshard, Buonas, CH;
Medela Holding AG, Baar, CH;
Abstract
A barrier of a vacuum pump prevents contamination from entering a vacuum pump air line. The barrier separates parts of the pump and is moveable between an initial state and a distended state. The barrier is assembled within the pump with a pre-load. When the vacuum source is applied to the barrier, the barrier achieves a distended state and when the vacuum source is released, the barrier incrementally self returns to an initial state. The geometry and material construction of the barrier, along with the pre-load, assists in returning the barrier on its own to the initial state from the distended state.