Patent US3929289A successfully refreshed from Google Patents.
US3929289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug for plug nozzles
Assignee: United States Department of the Navy
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Filing: 1968-12-23
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Granted: 1975-12-30
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Expires: 1988-12-23
Abstract
Abstract A plug for rocket motor plug nozzles has a shell constructed of a thermally anisotropic material, bulk preoriented pyroltic graphite. The shell material is oriented to serve as both an insulator and as a heat conductor to divert heat to various heat sinks. Resilient fastening means are employed to allow relative movement of parts to minimize the effects of thermal stresses.
Inventors
- 👤 Samuel Kardon
- 👤 Carlton J Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:46
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/80; F02K9/86; F05; F05D; F05D2240/00; F05D2240/10; F05D2240/12; F05D2240/128; F05D2240/1281
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
IN A ROCKET MOTOR HAVING A VARIABLE AREA NOZZLE FORMED BY A MOVEABLE COWL PORTION SURROUNDING A PLUG MEMBER, THE IMPROVEMENT COMPRISING: A PLUG MEMBER COMPRISING INNER AND OUTER COMPONENTS, SAID INNER COMPONENTS COMPRISING A FORWARD CORE, AN AFT CORE, AND A RETAINER DISK, FIRST RESILIENT MEANS FOR FASTENING SAID FORWARD CORE TO SAID AFT CORE AND SECOND RESILIENT MEANS FOR FASTENING SAID AFT CORE TO SAID RETAINER DISK, SAID RESILIENT MEANS ENABLING EXPANSION TO SAID PLUG COMPONENTS IN THE PRESENCE OF HEAT, SAID OUTER COMPONENT COMPRISING A FORWARD SHELL, AN AFT SHELL, AND AN INSULATOR DISKM SAID FORWARD SHELL AND SAID INSULATOR DISK BEING COMPRISED OF ASBESTOS-PHENOLIC MATERIAL, SAID AFT SHELL BEING COMPRISED OF PLURAL LAMINATIONSS OF BULK PREORIENTED PYROLYTIC GRAPHITE, SAID LAMINATIONS OF PYROLYTIC GRAPHITE BEING ORIENTED TO CONDUCT HEAT OF COMBUSTION TO SAID FORWARD SHELL AND TO SAID INSULATOR DISK AND TO INSULATE SAID INNER COMPONENTS FROM HEAT TO MINIMIZE DIMENSIONAL CHANGES IN SAID INNER COMPONENTS RESULTING FROM THE HEAT OF COMBUSTION AND TO THEREBY PROTECT SAID PLUG FROM STRUCTURAL FAILURE, SAID INNER COMPONENTS BEING ADAPTED TO SUPPORT SAID OUTER COMPONENTS TO THEREBY PROVUIDE DIMENSIONAL STABILITY TO SAID PLUG MEMBER.
Claim 2
Dependent Claim
193 words
IN A ROCKET MOTOR HAVING A VARIABLE AREA NOZZLE FORMED BY A MOVEABLE COWL PORTION SURROUNDING A PLUG MEMBER, THE IMPROVEMENT COMPRISING: A PLUG MEMBER COMPRISING INNER AND OUTER COMPONENTS, SAID INNER COMPONENTS COMPRISING A FORWARD CORE, AN AFT CORE, AND A RETAINER DISK, FIRST RESILIENT MEANS FOR FASTENING SAID FORWARD CORE TO SAID AFT CORE AND SECOND RESILIENT MEANS FOR FASTENING SAID AFT CORE TO SAID RETAINER DISK, SAID RESILIENT MEANS ENABLING EXPANSION TO SAID PLUG COMPONENTS IN THE PRESENCE OF HEAT, SAID OUTER COMPONENT COMPRISING A FORWARD SHELL, AN AFT SHELL, AND AN INSULATOR DISKM SAID FORWARD SHELL AND SAID INSULATOR DISK BEING COMPRISED OF ASBESTOS-PHENOLIC MATERIAL, SAID AFT SHELL BEING COMPRISED OF PLURAL LAMINATIONSS OF BULK PREORIENTED PYROLYTIC GRAPHITE, SAID LAMINATIONS OF PYROLYTIC GRAPHITE BEING ORIENTED TO CONDUCT HEAT OF COMBUSTION TO SAID FORWARD SHELL AND TO SAID INSULATOR DISK AND TO INSULATE SAID INNER COMPONENTS FROM HEAT TO MINIMIZE DIMENSIONAL CHANGES IN SAID INNER COMPONENTS RESULTING FROM THE HEAT OF COMBUSTION AND TO THEREBY PROTECT SAID PLUG FROM STRUCTURAL FAILURE, SAID INNER COMPONENTS BEING ADAPTED TO SUPPORT SAID OUTER COMPONENTS TO THEREBY PROVUIDE DIMENSIONAL STABILITY TO SAID PLUG MEMBER.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |