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:
Aug. 20, 2013
Filed:
Dec. 18, 2009
Stefano Bartolucci, London, GB;
Paulus Hoefte, St Martens Latem, BE;
John David Lamb, Marlborough, GB;
Paul Robert Scott, Brussels, BE;
Pedro Vincent Vandecappelle, Izegem, BE;
Stefano Bartolucci, London, GB;
Paulus Hoefte, St Martens Latem, BE;
John David Lamb, Marlborough, GB;
Paul Robert Scott, Brussels, BE;
Pedro Vincent Vandecappelle, Izegem, BE;
The Procter & Gamble Company, Cincinnati, OH (US);
Abstract
A dispenser for viscous materials has a housing with a moveable wall that divides the interior volume of the housing into a distal product chamber and a proximal pressure chamber. An outlet from the product chamber is located adjacent to the distal end of the housing and an air inlet is provided to allow air to enter the pressure chamber. Displacement of the product occurs when accumulated excess air pressure in the pressure chamber acts on the back of the movable wall. The excess air pressure is built up by a bellows assembly arranged in fluid communication with the pressure chamber. On actuation, the bellows can be reduced in volume and subsequently recover by entry of air through the inlet. The direction of force application is preferably perpendicular to the housing axis and the location of the bellows is preferably distant from the product outlet.