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:
May. 29, 1990
Filed:
Nov. 30, 1988
Karl O Larsson, Lindenweg, CH;
ISG/AG, , CH;
Abstract
An improved breastpump has a valve which closes off a path to a milk container in the presence of a negative pressure in the valve, and opens the path when the pressure is removed. The valve consists of a housing and a thin flexible membrane that is removably attached to the valve housing and covers a first opening in the housing through which milk can flow. The thin flexible membrane is preferably circular in shape with a knob formed in its center. The knob fits in a second opening in the housing in a snap-fit. This construction for the membrane assumes that it can never be mounted improperly. Raised bosses in the form of cone-shaped elevations are arranged around the perimeter of the flexible membrane. The cone-shaped bosses reinforce the membrane material and prevent the membrane from being drawn into the first opening.