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:
Nov. 12, 1991
Filed:
Dec. 14, 1990
Eric J Schmitt-Matzen, Newport News, VA (US);
Other;
Abstract
A solenoid coil is fabricated by precisioin winding a length of bondable magnet wire on a mandrel, heating and axially compressing the precision-wound convolutions to cause the bondable insulation to deform into a unitary, void-free mass, but without deforming the pre-existing circular cross section of the conductive metal core of the wire, and allowing the wire to cool such that the mass immovably captures the convolutions of the conductive core to thereby form a free-standing coil. The coil is then disposed in a mold cavity where the entirety of the coil is encapsulated. This produces a solenoid coil that is well-suited for use in high-pressure 'wet' environments because the encapsulated assembly is strong and leak-proof. The encapsulant may be molded in such a manner as to have no seams extending from its surface to the winding.