Insulator structure and method of construction
AssigneeMacLean-Fogg Company
InventorJiri Pazdirek
Life of this patent
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Abstract
A composite link and insulator, and method of construction, includes a fiberglass body. The body is formed by coating glass fibers with a liquid resin and winding the fibers around a plurality of tubular fittings or bushings in two layers, a first extending longitudinally of the body and the second transversely and around the first. A polymer shield layer and weathersheds are injection molded over the fiberglass body to create an insulator. The insulator may also be provided with stiffening plastic inserts at either end for increasing strength without adding significantly to the insulator's overall weight.
Claims31
A composite insulator comprising:
- a) a body comprised of glass fiber;
- b) at least one bushing embedded in said body;
- c) a shield layer around said body;
- d) a plurality of weathersheds on said shield layer;
- and
- e) at least one stiffening insert embedded in said body;
- f) said body being further comprised of a solid rod portion formed by winding layers of said glass fiber.
A composite insulator comprising:
- a) a first layer of glass fibers;
- b) a second layer of glass fibers wound around said first layer;
- c) a rod portion comprised of said first and second layers of glass fiber;
- d) a shield layer and weathersheds molded in one piece over said glass fibers;
- and
- e) at least one stiffening insert embedded in said glass fibers.
A composite link comprising:
- a) a body comprising primarily glass fiber;
- b) said body having a plurality of fittings embedded therein;
- c) said body further having at least one stiffening insert embedded therein;
- d) said fibers being coated with resin and wound around and between said fittings to form a primary layer;
- e) said resin coated fibers also being wound around said primary layer to form a secondary layer.
A method of manufacturing a composite insulator comprising the steps of:
- a) winding a first layer of glass fibers longitudinally around first and second bushings whose axes are spaced from each other;
- b) winding a second layer of glass fibers transversely around said first layer to form a solid rod portion from said first and second glass fiber layers;
- and
- c) molding a polymer shield layer over said glass fibers.
An insulator comprising:
- a) a body comprised of glass fiber, including a solid rod portion formed by winding layers of said glass fiber;
- b) at least one bushing embedded in said body;
- and
- c) at least one stiffening insert embedded in said body.
Dependencies are inferred from the claim text.