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. 22, 2000
Filed:
Sep. 29, 1998
Jan Adolf Sperna Weiland, Deventer, NL;
Sara Lee/DE N.V., Utrecht, NL;
Abstract
A pump comprises an inlet for pumping a liquid and an outlet nozzle for dispensing the pumped liquid. The outlet nozzle comprises an outflow opening which includes an outlet valve formed by a valve wall made of a flexible material. In a rest position, the valve wall closes the outflow opening. The valve wall comprises at least three cuts provided in the configuration of a star, each extending from a common point of the valve wall in a radial direction of the outflow opening. The pump further comprises an outlet valve energization element for pressing valve subwalls, formed between the cuts of the valve wall, from an inside of the outlet nozzle adjacent to the valve wall in a downstream direction of the outlet nozzle, whereby the valve subwalls are bent in the downstream direction and at the cuts between the valve subwalls flow passages are formed for opening the outflow opening for dispensing the pumped liquid. The valve subwalls spring back to the rest position and close the outflow opening again when the outlet valve energization element is moved back in a direction opposite to the downstream direction.