US5018220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Firefighter's helmet
Assignee: Lion Apparel Inc
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Filing: 1990-02-23
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Granted: 1991-05-28
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Expires: 2010-02-23
Abstract
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.
Inventors
- 👤 Abbott A. Lane
- 👤 John M. Hetzel, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:09
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/06; A42B3/062; A42B3/063; B; B32; B32B; B32B27/00; B32B27/34; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/10; B29C70/16; B29C70/22; B29C70/222; B32B27/04; B32B27/28; B32B38/00; B32B38/08; C; C08; C08J; C08J5/00; C08J5/18; B29L; B29L2031/00; B29L2031/48; B29L2031/4807; B29L2031/4814; B29L2031/4821; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2307/00; B32B2307/50; B32B2307/558; B32B2315/00; B32B2315/08; B32B2315/085; B32B2367/00; B32B2377/00; B32B2437/00; B32B2437/04; C08J2367/00; C08J2367/06; Y; Y10; Y10S; Y10S2/00; Y10S2/903; Y10S428/00; Y10S428/92
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
96 words
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.
Claim 2
Independent Claim
96 words
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.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the layer of cloth knit material is a raschel knit type of material.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the polyester resin material includes a coupling agent which is about one-half of one percent by volume of the polyester resin material.
Claim 5
Dependent Claim
75 words
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.
Claim 6
Dependent Claim
75 words
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.
Claim 7
Dependent Claim
44 words
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.
Claim 8
Dependent Claim
44 words
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.
Claim 9
Dependent Claim
57 words
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).
Claim 10
Dependent Claim
57 words
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).
Claim 11
Dependent Claim
74 words
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.
Claim 12
Dependent Claim
74 words
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.
Claim 13
Independent Claim
89 words
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.
Claim 14
Independent Claim
89 words
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.
Claim 15
Independent Claim
85 words
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.
Claim 16
Independent Claim
85 words
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.
Claim 17
Independent Claim
71 words
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.
Claim 18
Independent Claim
71 words
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.
Claim 19
Independent Claim
83 words
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).
Claim 20
Independent Claim
83 words
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).
Claim 21
Independent Claim
91 words
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.
Claim 22
Independent Claim
91 words
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.
Claim 23
Independent Claim
79 words
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.
Claim 24
Independent Claim
79 words
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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |