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. 17, 1999
Filed:
Apr. 09, 1997
Gary Conroy, Kings Lynn, GB;
David Howlett, Kings Lynn, GB;
Bespak PLC, King's Lynn, GB;
Abstract
A metering valve for dispensing an accurately metered dose of a product includes a valve stem having at one end a piston extending within and slidable relative to a cup shaped valve body. A spring member urges the piston against a base of the valve body. Movement of the valve stem against the spring action causes the piston to move away from the base of the valve body to define a temporary metering chamber between the valve stem and valve body. A clearance between an outer surface of the piston and an inner surface of the valve body provides a path for the product to flow from the container to the metering chamber. A seal within the container is contacted by an end of the piston to prevent the flow of product along the path, and the product is dispensed from the temporary metering chamber through an outlet in the valve stem.