Electrical heating element for use in a personal comfort device
First Claim
Patent Images
1. An electrical heating element protected against being inimical to the health of a person using the element, comprising:
- (a) an electrical heating means for generating heat in proportion to an amount of electrical current flowing therethrough, said heating means providing essentially all of the heat for said element and including a non-conductive core and a conductive resistance portion helically wrapped around said core and a positive temperature conductive polymer surrounding said conductive resistance portions and electrically contacting said conductive resistance portion; and
,(b) means disposed over said electrical heating means for enclosing the electromagnetic and electrostatic fields of the electrical current flowing therethrough including an electrically conductive foil portion wrapped over said conductive polymer and electrically contacting said conductive polymer, said electrically conductive foil portion surrounding and enclosing said conductive polymer for enclosing the electromagnetic and electrostatic fields of the electrical current flowing through said conductive resistance portion.
0 Assignments
0 Petitions
Accused Products
Abstract
An electrical resistance heating element protected against being inimical to the health of a person using the element by enclosing the electromagnetic and electrostatic fields of an electrical current flowing through an electrical heating element providing essentially all of the heat for the element.
-
Citations
16 Claims
-
1. An electrical heating element protected against being inimical to the health of a person using the element, comprising:
-
(a) an electrical heating means for generating heat in proportion to an amount of electrical current flowing therethrough, said heating means providing essentially all of the heat for said element and including a non-conductive core and a conductive resistance portion helically wrapped around said core and a positive temperature conductive polymer surrounding said conductive resistance portions and electrically contacting said conductive resistance portion; and
,(b) means disposed over said electrical heating means for enclosing the electromagnetic and electrostatic fields of the electrical current flowing therethrough including an electrically conductive foil portion wrapped over said conductive polymer and electrically contacting said conductive polymer, said electrically conductive foil portion surrounding and enclosing said conductive polymer for enclosing the electromagnetic and electrostatic fields of the electrical current flowing through said conductive resistance portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. An electrical heating element protected against being inimical to the health of a person using the element, comprising:
-
(a) a nonconductive core and a conductive resistance portion helically and coextensively wrapped around said core, said core and said resistance portion providing an electrical heating means for generating heat in proportion to an amount of electrical current flowing through said resistance portion, said resistance portion providing essentially all of the heat for said element; (b) a positive temperature conductive polymer surrounding said heating means and electrically contacting said resistance portion, said nonconductive core, said conductive resistance portion and said conductive polymer providing said electrical heating means; and
,(c) means surrounding said conductive polymer and spaced from and enclosing said resistance portion for enclosing the electromagnetic and electrostatic fields of the electrical current flowing through said resistance portion, said means for enclosing the electromagnetic and electrostatic fields electrically contacting said conductive polymer. - View Dependent Claims (13, 14)
-
-
15. A method of manufacturing an electrical heating element, comprising the steps of:
-
(a) melt extruding a polymer over an elongated conductive resistance portion so that said resistance portion is disposed concentrically and coextensively within said polymer; (b) placing an electrically conductive wrap around said polymer and enclosing the resistance portion; (c) helically and coextensively wrapping a conductive wire around said electrically conductive wrap; and
,(d) helically and coextensively wrapping a conductive wire around said polymer between said polymer and said electrically conductive wrap. - View Dependent Claims (16)
-
Specification