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:
Mar. 26, 1996
Filed:
Sep. 21, 1994
Robert H Reinicke, Mission Viejo, CA (US);
Derek T Schappell, Morristown, NJ (US);
Marotta Scientific Controls, Inc., Montville, NJ (US);
Abstract
A valve for fail-safe return to its normally closed condition relies upon solenoid-driven elongation of a magnetostrictive core element, for opening displacement of a valve member, and also relies upon a continuously available, stiffly compliant preload of the valve member into its position of lock-up at valve closure. The currently preferred material of the core is Terfenol-D, which offers a strong elongation response to inductively coupled excitation. The elongation response is sufficient to serve the purposes of driving a poppet-valve member from closed to open position, with a relatively short time constant, as well as to permit a closed condition of the valve wherein the driving end of the core is effectively disconnected from the poppet-valve member, so that the prestressed stiff compliance can alone be operative on the poppet-valve member for fail-safe closure of the valve.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile