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:
Sep. 09, 2014
Filed:
Jul. 14, 2011
Franciscus Jozef Bosman, Eindhoven, NL;
Bernardo Arnoldus Mulder, Eindhoven, NL;
Franciscus Jozef Bosman, Eindhoven, NL;
Bernardo Arnoldus Mulder, Eindhoven, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
In a breast pump, milk expressed from a user's nipple may be drawn into the pumping mechanism used to create a vacuum. This can lead to unhygienic situations because pumping mechanisms are difficult or impossible to clean by a user. The present invention relates to a breast pump comprising first and second pressure chambers () and an actuator () disposed to fluidly divide the two chambers (). The actuator () is movable to generate an inverse pressure differential in the second chamber () when a pressure differential is generated in the first pressure chamber (), or a pressure differential is released from the first pressure chamber (). Furthermore, the actuator () comprises a first piston element () and a second piston element (), and wherein the first pressure chamber () is disposed between the first piston element () and the second piston element ().