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. 18, 2000
Filed:
Mar. 01, 1999
Alfred J LaGreca, Hingham, MA (US);
David E Butz, Groton, MA (US);
Research and Development Products LLC, Hingham, MA (US);
Abstract
A solenoid valve comprises a conduit having first and second ports and a valve seat in the conduit between the ports. A ferro-magnetic valve member is positioned in the conduit between one of the ports in the valve seat which valve member is movable between a closed position wherein the valve member seats against the valve seat and isolates the two ports and an open position wherein the valve member is spaced from the valve seat and allows fluid flow between the ports. The valve also includes a multi-turn coil having an axial passage therethrough which passage is dimensioned to slidably receive the conduit. The valve member is normally biased to one of its two positions in the conduit. However, when the conduit is received in the coil passage and the coil is energized, the electromagnetic field produced by the coil moves the valve member to its other position thereby either opening or closing the valve depending upon the initial state of the valve member. The valve conduit and its contents are separable from the solenoid coil so that the conduit and its contents can be separately handled and sterilized and can be installed in various apparatus equipped with similar solenoid coils for actuating the valve member.