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:
Apr. 09, 2002
Filed:
May. 03, 2000
Robert Briant, Manchester, NH (US);
Wayne Pascoal, Manchester, NH (US);
James A. Burns, Merrimack, NH (US);
Other;
Abstract
A proportional flow valve wherein a solenoid assembly moves an armature assembly towards a valve seat in proportion to the flow of current through the solenoid assembly. The armature assembly abuttingly engages a seal to hold the seal away from the valve seat at a distance correspondingly proportionally related to the applied current. In this manner, the seal is movable towards and away from the valve seat among a fully open position, a closed position, and partially open positions therebetween. A spring assembly biases the seal towards the valve seat and, when the solenoid assembly is energized, the armature assembly allows the spring assembly to seat the seal against the valve seat to place it in the closed position.