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:
Jul. 21, 2009
Filed:
Oct. 17, 2001
Bart Lambertus Theodorus Johannes Van DE Braak, Weert, NL;
Patrick Lambertus Kerkhof, Zoetermeer, NL;
Eelco Jan Gerardus Witteveen, Schiedam, NL;
Bart Lambertus Theodorus Johannes Van De Braak, Weert, NL;
Patrick Lambertus Kerkhof, Zoetermeer, NL;
Eelco Jan Gerardus Witteveen, Schiedam, NL;
Vacu Vin Innovations Ltd., Gibralter, GB;
Abstract
Pump for applying an increased or reduced pressure to a container. The pump is provided with a plate-like part which reacts to the pressure difference between the container and the environment. This part can preferably adopt two stable positions, and a change is signalled. This change can be brought about, for example, by the sound generated as a result of the plate-like part turning over. The pitch and the like of the sound can be influenced by arranging the plate-like part in a hollow piston and providing the latter with openings leading to the environment.