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. 23, 2002
Filed:
Jun. 04, 2001
Anthony Charles Lammond Wass, Stamford, GB;
Jeffrey William Spencer, Leicestershie, GB;
Richard Smith, Leicestershie, GB;
Brian Robert Law, Leicester, GB;
Rieke Packaging Systems Limited, Leicester, GB;
Abstract
A fixed-nozzle dispenser pump suitable for large doses has a downwardly-directed nozzle tip ( ) and an outlet valve arrangement ( ) in a nozzle ( ). A blocking element, such as a ball ( ), of the outlet valve arrangement ( ) is biased back along a close-fitting tubular draw path ( ) in the valve after dispensing, so as to draw product back out of the nozzle tip and prevent dripping. A further feature is a subdivision of the nozzle tip and a flexible flap valve ( ) blocking a resulting passage segment in the nozzle. This facilitates clearance of another nozzle passage ( ) by the reverse suction. A further feature is a membrane ( ) across the front of the piston plunger, advanceable relative to a piston seal ( ) by pressure of a plunger head ( ). This helps accomomodate the returned fluid and enables a spot-dosing action.