Patent US3765177A successfully refreshed from Google Patents.
US3765177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocket motor with blast tube and case bonded propellant
Assignee: ATK Launch Systems LLC
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Filing: 1959-12-30
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Granted: 1973-10-16
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Expires: 1979-12-30
Abstract
Abstract 2. A multiple end-burning rocket comprising a motor casing closed at its forward end and having rearward nozzle means, at least one propellant charge therein case-bonded to said motor casing and having a plurality of end-burning surfaces, and a hollow blast tube extending through said propellant charge and to which said charge is bonded, said tube being expansible and contractible in response to changes in the dimensions of said propellant charge, and said blast tube comprising a cured mixture of a liquid bisphenol epoxide polymer and a liquid polythiopolymercaptan polymer.
Inventors
- 👤 H Ritchey
- 👤 Dermott J Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:53
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/346; F02K9/10; F02K9/22; F02K9/36
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
A multiple end-burning rocket comprising a motor casing, closed at its forward end and having rearward nozzle means, a propellant charge therein bonded to said motor casing and having a plurality of end burning surfaces, and a hollow heat resistant elastic central duct in said propellant charge for conducting gases from anterior to posterior portions of said rocket, said charge being bonded to said duct, and said duct comprising a cured composition comprising between about 50 parts and 90 part by weight of a liquid polyepoxy compound, between about 50 parts and 10 parts by weight of a liquid polythiopolymercaptan polymer, about 10 per cent by weight of 2,4,6-tri-dimethylaminomethyl phenol based on the weight of epoxide resin, and between about 30 per cent and 45 per cent by weight of asbestos filler, based on the total weight of the mixture.
Claim 2
Dependent Claim
140 words
A multiple end-burning rocket comprising a motor casing, closed at its forward end and having rearward nozzle means, a propellant charge therein bonded to said motor casing and having a plurality of end burning surfaces, and a hollow heat resistant elastic central duct in said propellant charge for conducting gases from anterior to posterior portions of said rocket, said charge being bonded to said duct, and said duct comprising a cured composition comprising between about 50 parts and 90 part by weight of a liquid polyepoxy compound, between about 50 parts and 10 parts by weight of a liquid polythiopolymercaptan polymer, about 10 per cent by weight of 2,4,6-tri-dimethylaminomethyl phenol based on the weight of epoxide resin, and between about 30 per cent and 45 per cent by weight of asbestos filler, based on the total weight of the mixture.
Claim 3
Dependent Claim
88 words
MULTIPLE END-BURNING ROCKET COMPRISING A MOTOR CASING CLOSED AT ITS FORWARD END AND HAVING REARWARD NOZZLE MEANS, AT LEAST ONE PROPELLANT CHARGE THEREIN CASE-BONDED TO SAID MOTOR CASING AND HAVING A PLURALITY OF END-BURNING SURFACES, AND A HOLLOW BLAST TUBE EXTENDING THROUGH SAID PROPELLANT CHARGE AND TO WHICH SAID CHARGE IS BONDED, SAID TUBE BEING EXPANSIBLE AND CONTRACTIBLE IN RESPONSE TO CHANGES IN THE DIMENSIONS OF SAID PROPELLANT CHARGE, AND SAID BLAST TUBE COMPRISING A CURED MIXTURE OF A LIQUID BISPHENOL EPOXIDE POLYMER AND A LIQUID POLYTHIOPOLYMERCAPTAN POLYMER.
Claim 4
Dependent Claim
88 words
MULTIPLE END-BURNING ROCKET COMPRISING A MOTOR CASING CLOSED AT ITS FORWARD END AND HAVING REARWARD NOZZLE MEANS, AT LEAST ONE PROPELLANT CHARGE THEREIN CASE-BONDED TO SAID MOTOR CASING AND HAVING A PLURALITY OF END-BURNING SURFACES, AND A HOLLOW BLAST TUBE EXTENDING THROUGH SAID PROPELLANT CHARGE AND TO WHICH SAID CHARGE IS BONDED, SAID TUBE BEING EXPANSIBLE AND CONTRACTIBLE IN RESPONSE TO CHANGES IN THE DIMENSIONS OF SAID PROPELLANT CHARGE, AND SAID BLAST TUBE COMPRISING A CURED MIXTURE OF A LIQUID BISPHENOL EPOXIDE POLYMER AND A LIQUID POLYTHIOPOLYMERCAPTAN POLYMER.
Claim 5
Dependent Claim
19 words
A rocket as in claim 2 wherein said cured mixture additionally comprises a refractory solid mixed with said polymers.
Claim 6
Independent Claim
68 words
The method of making a multiple end-burning rocket motor which comprises centrally positioning a hollow duct of a cast heat resistant synthetic resin within a motor casing, said resin comprising a bisphenol epoxide polymer and a polythiopolymercaptan polymer, and casting thereabout a case-bonding propellant charge having anterior and posterior end-burning surfaces, said duct being expansible and contractible in response to changes in the dimensions of said propellant charge.
Claim 7
Independent Claim
68 words
The method of making a multiple end-burning rocket motor which comprises centrally positioning a hollow duct of a cast heat resistant synthetic resin within a motor casing, said resin comprising a bisphenol epoxide polymer and a polythiopolymercaptan polymer, and casting thereabout a case-bonding propellant charge having anterior and posterior end-burning surfaces, said duct being expansible and contractible in response to changes in the dimensions of said propellant charge.
Claim 8
Dependent Claim
18 words
The method as in claim 4 wherein said resin additionally comprises a refractory solid mixed with said polymers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |