Firefighter's helmet
AssigneeFirequip Helmets, Inc.
InventorsAbbott A. Lane, John M. Hetzel, Jr.
Life of this patent
Estimating the term…
Abstract
A firefighter's helmet having improved heat resistance and protective qualities while being also relatively light in weight having a protective outer shell composed of at least one layer of a fabric of a mixture of polybenzimidazole and high modulus aramid materials and a complementary layer of a very fine glass cloth adjacent at least one side of the polybenzimidazole-aramid layer, impregnated with and molded in a desired shape within a polyester resin material containing a small percentage of a coupling agent. The outer shell may also consist of additional layers of fibrous reinforcing materials molded within the resin material.
Claims13
A method of producing a shell of a firefighter's helmet comprising providing a layer of fine fiber glass type material, covering the layer of fine fiber glass material with a layer of knit cloth material, covering the layer of knit cloth material with a layer of coarse fiber glass type material, covering the layer of coarse fiber glass type material with a layer of fine fiber glass type material, impregnating the layers in a body of polyester resin material, and molding all of the materials into a desired shape of a shell of a firefighter's helmet.
A firefighter's helmet comprising a rigid outer shell including at least one layer of a fabric of a mixture of polybenzimidazole and aramid materials impregnated with and molded in a desired shape within a resin material wherein a complementary layer of a very fine glass cloth is adjacent at least one side of the polybenzimidazole-aramid fabric layer, the very fine glass cloth comprising individual fibers having a transverse dimension of from 24 to 26 microns.
A firefighter's helmet comprising a rigid outer shell including at least one layer of a fabric of a mixture of polybenzimidazole and aramid materials impregnated with and molded in a desired shape within a resin material wherein the resin material includes a coupling agent.
A firefighter's helmet comprising a rigid outer shell including at least one layer of a fabric of a mixture of polybenzimidazole and aramid materials impregnated with and molded in a desired shape within a resin material wherein the resin material includes a coupling agent and said coupling agent is ZIRCONIUM IV DI NEOALKANOLATO, DI (PARA AMINO BENZOATO-O).
A firefighter's helmet comprising a rigid outer shell including at least one layer of a fabric of a mixture of polybenzimidazole and aramid materials impregnated with and molded in a desired shape within a resin material wherein the resin material includes a coupling agent and said coupling agent is ZIRCONIUM IV DI NEOALKANOLATO, DI (PARA AMINO BENZOATO-O) which is present in a proportion by volume of one-half of one percent of the resin material.
A method of producing a shell of a firefighter's helmet comprising providing a first layer of a raschel knit cloth material, positioning a layer of very fine glass cloth on at least one side of said first layer, impregnating and enclosing all of said layers within a resin material, and molding the resin material and said layers into a desired shell shape, wherein the raschel knit cloth material is a mixture of polybenzimidazole and aramid, said mixture comprising by volume about thirty-four percent polybenzimidazole and about sixty-six percent aramid.
A method of producing a shell of a firefighter's helmet comprising providing a first layer of a raschel knit cloth material, positioning a layer of very fine glass cloth on at least one side of said first layer, impregnating and enclosing all of said layers within a resin material, and molding the resin material and said layers into a desired shell shape, wherein the raschel knit cloth material is a mixture of polybenzimidazole and aramid having a weight of about five ounces per square yard.
A method of producing a shell of a firefighter's helmet comprising providing a first layer of a raschel knit cloth material, positioning a layer of very fine glass cloth on at least one side of said first layer, impregnating and enclosing all of said layers within a resin material, and molding the resin material and said layers into a desired shell shape including admixing a coupling agent into the resin material.
A method of producing a shell of a firefighter's helmet comprising providing a first layer of a raschel knit cloth material, positioning a layer of very fine glass cloth on at least one side of said first layer, impregnating and enclosing all of said layers within a resin material, and molding the resin material and said layers into a desired shell shape including admixing a coupling agent into the resin material wherein the coupling agent is ZIRCONIUM IV DI NEOALKANOLATO, DI(PARA AMINO BENZOATO-O).
A method of producing a shell of a firefighter's helmet comprising providing a first layer of a raschel knit cloth material, positioning a layer of very fine glass cloth on at least one side of said first layer, impregnating and enclosing all of said layers within a resin material, and molding the resin material and said layers into a desired shell shape including admixing a coupling agent into the resin material wherein the coupling agent is admixed in a proportion by volume of one-half of one percent of the resin material.
A method of producing a shell of a firefighter's helmet comprising providing a first layer of a raschel knit cloth material, positioning a layer of very fine glass cloth on at least one side of said first layer, impregnating and enclosing all of said layers within a resin material, and molding the resin material and said layers into a desired shell shape, wherein the very fine glass cloth comprises individual fibers of from 24 to 26 microns in diameter.
Dependencies are inferred from the claim text.