Patent US4044555A successfully refreshed from Google Patents.
US4044555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear section of jet power plant installations
Assignee: Hayes International Corp
•
Filing: 1958-09-30
•
Granted: 1977-08-30
•
Expires: 1978-09-30
Abstract
Abstract 1. In a gas turbine engine having blades and an exhaust tailpipe, the combination of an exhaust cone axially mounted within the tailpipe and having its rearward end adjacent the discharge opening of the exhaust pipe with substantially all of the externally viewable surfaces of said exhaust cone formed of porous stainless steel material, means to supply cooling air to the interior of the cone for venting thereof through said porous material, a hollow strut member of airfoil configuration spanning the annular gas passageway between the exhaust tailpipe and the said cone with substantially all of the externally viewable surfaces of said strut member formed of stainless steel material, means to supply cooling air to the interior of said hollow strut member, means to pass cooling air in heat interchange relation with the outer surface of substantially all parts of the exhaust tailpipe whose related inner surface is externally viewable, and a constriction in the exhaust tailpipe located downstream of the hot parts of the engine and serving with the exhaust cone to conceal the hot parts of the engine from external view, whereby the detectible infrared emission of the engine is substantially reduced.
Inventors
- 👤 William G. McLoughlin
- 👤 Arnold V. Pilling
- 👤 John Reardon
- 👤 William E. Addison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:09
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/78; F02K1/82; F02K1/822; F02K1/825
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
193 words
In a gas turbine engine having blades and an exhaust tailpipe, the combination of an exhaust cone axially mounted within the tailpipe and having its rearward end adjacent to discharge opening of the exhaust pipe with substantially all of the externally viewable surfaces of said exhaust cone formed or porous stainless steel material, means to supply cooling air to the interior of the cone for venting thereof through said porous material, a hollow strut member of airfoil configuration spanning the annular gas passageway between the exhaust tailpipe and the said cone with substantially all of the externally viewable surfaces of said strut member formed of stainless steel material, means to supply cooling air to the interior of said hollow strut member, means to pass cooling air in heat interchange relation with the outer surface of substantially all parts of the exhaust tailpipe whose related inner surface is externally viewable, and a constriction in the exhaust tailpipe located downstream of the hot parts of the engine and serving with the exhaust cone to conceal the hot parts of the engine from external view, whereby the detectible infrared emission of the engine is substantially reduced.
Claim 2
Dependent Claim
193 words
In a gas turbine engine having blades and an exhaust tailpipe, the combination of an exhaust cone axially mounted within the tailpipe and having its rearward end adjacent to discharge opening of the exhaust pipe with substantially all of the externally viewable surfaces of said exhaust cone formed or porous stainless steel material, means to supply cooling air to the interior of the cone for venting thereof through said porous material, a hollow strut member of airfoil configuration spanning the annular gas passageway between the exhaust tailpipe and the said cone with substantially all of the externally viewable surfaces of said strut member formed of stainless steel material, means to supply cooling air to the interior of said hollow strut member, means to pass cooling air in heat interchange relation with the outer surface of substantially all parts of the exhaust tailpipe whose related inner surface is externally viewable, and a constriction in the exhaust tailpipe located downstream of the hot parts of the engine and serving with the exhaust cone to conceal the hot parts of the engine from external view, whereby the detectible infrared emission of the engine is substantially reduced.
Claim 3
Dependent Claim
29 words
An engine as described in claim 1 wherein the externally viewable surfaces of the strut member are formed of stainless sheet steel having a multiplicity of closely-spaced perforations therein.
Claim 4
Dependent Claim
24 words
An engine as described in claim 1 wherein the externally viewable surfaces of the strut member are formed of woven stainless steel wire mesh.
Claim 5
Dependent Claim
23 words
An engine as described in claim 1 wherein the externally viewable surfaces of the strut member are formed of compressed stainless steel wool.
Claim 6
Dependent Claim
207 words
In a gas turbine engine having blades and an exhaust tailpipe, the combination of an exhaust cone axially mounted within the tailpipe and having a pointed end adjacent the discharge opening of the exhaust pipe with substantially all of the externally viewable surfaces of said exhaust cone formed of stainless sheet steel having a multiplicity of closely-spaced perforations therein, means to supply cooling air to the interior of the cone for venting thereof through said perforations, a hollow strut member of airfoil configuration spanning the annular gas passageway between the exhaust tailpipe and the said cone with substantially all of the externally viewable surfaces of said strut member formed of porous stainless steel material, means to supply cooling air to the interior of said hollow strut member for venting thereof through said porous material, and means to pass cooling air in heat interchange relation with the outer surface of substantially all parts of the exhaust tailpipe whose related inner surface is externally viewable, and a constriction in the exhaust tailpipe located downstream of the hot parts of the engine and serving with the exhaust cone to conceal the hot parts of the engine from external view, whereby the detectible infrared emission of the engine is substantially reduced.
Claim 7
Dependent Claim
207 words
In a gas turbine engine having blades and an exhaust tailpipe, the combination of an exhaust cone axially mounted within the tailpipe and having a pointed end adjacent the discharge opening of the exhaust pipe with substantially all of the externally viewable surfaces of said exhaust cone formed of stainless sheet steel having a multiplicity of closely-spaced perforations therein, means to supply cooling air to the interior of the cone for venting thereof through said perforations, a hollow strut member of airfoil configuration spanning the annular gas passageway between the exhaust tailpipe and the said cone with substantially all of the externally viewable surfaces of said strut member formed of porous stainless steel material, means to supply cooling air to the interior of said hollow strut member for venting thereof through said porous material, and means to pass cooling air in heat interchange relation with the outer surface of substantially all parts of the exhaust tailpipe whose related inner surface is externally viewable, and a constriction in the exhaust tailpipe located downstream of the hot parts of the engine and serving with the exhaust cone to conceal the hot parts of the engine from external view, whereby the detectible infrared emission of the engine is substantially reduced.
Claim 8
Dependent Claim
203 words
In a gas turbine engine having blades and an exhaust tailpipe, the combination of an exhaust cone axially mounted within the tailpipe and having a pointed end adjacent the discharge opening of the exhaust pipe with substantially all of the externally viewable surfaces of said exhaust cone formed of woven stainless steel wire mesh, means to supply cooling air to the interior of the cone for venting thereof through said wire mesh, a hollow strut member of airfoil configuration spanning the annular gas passageway between the exhaust tailpipe and the said cone with substantially all of the externally viewable surfaces of said strut member formed of porous stainless steel material, means to supply cooling air to the interior of said hollow strut member for venting thereof through said porous material, and means to pass cooling air in heat interchange relation with the outer surface of substantially all parts of the exhaust tailpipe whose related inner surface is externally viewable, and a constriction in the exhaust tailpipe located downstream of the hot parts of the engine and serving with the exhaust cone to conceal the hot parts of the engine from external view, whereby the detectible infrared emission of the engine is substantially reduced.
Claim 9
Dependent Claim
203 words
In a gas turbine engine having blades and an exhaust tailpipe, the combination of an exhaust cone axially mounted within the tailpipe and having a pointed end adjacent the discharge opening of the exhaust pipe with substantially all of the externally viewable surfaces of said exhaust cone formed of woven stainless steel wire mesh, means to supply cooling air to the interior of the cone for venting thereof through said wire mesh, a hollow strut member of airfoil configuration spanning the annular gas passageway between the exhaust tailpipe and the said cone with substantially all of the externally viewable surfaces of said strut member formed of porous stainless steel material, means to supply cooling air to the interior of said hollow strut member for venting thereof through said porous material, and means to pass cooling air in heat interchange relation with the outer surface of substantially all parts of the exhaust tailpipe whose related inner surface is externally viewable, and a constriction in the exhaust tailpipe located downstream of the hot parts of the engine and serving with the exhaust cone to conceal the hot parts of the engine from external view, whereby the detectible infrared emission of the engine is substantially reduced.
Claim 10
Dependent Claim
202 words
In a gas turbine engine having blades and an exhaust tailpipe, the combination of an exhaust cone axially mounted within the tailpipe and having a pointed end adjacent the discharge opening of the exhaust pipe with substantially all of the externally viewable surfaces of said exhaust cone formed of compressed stainless steel wool, means to supply cooling air to the interior of the cone for venting thereof through said steel wool, a hollow strut member of airfoil configuration spanning the annular gas passageway between the exhaust tailpipe and the said cone with substantially all of the externally viewable surfaces of said strut member formed of porous stainless steel material, means to supply cooling air to the interior of said hollow strut member for venting thereof through said porous material, and means to pass cooling air in heat interchange relation with the outer surface of substantially all parts of the exhaust tailpipe whose related inner surface is externally viewable, and a constriction in the exhaust tailpipe located downstream of the hot parts of the engine and serving with the exhaust cone to conceal the hot parts of the engine from external view, whereby the detectible infrared emission of the engine is substantially reduced.
Claim 11
Dependent Claim
202 words
In a gas turbine engine having blades and an exhaust tailpipe, the combination of an exhaust cone axially mounted within the tailpipe and having a pointed end adjacent the discharge opening of the exhaust pipe with substantially all of the externally viewable surfaces of said exhaust cone formed of compressed stainless steel wool, means to supply cooling air to the interior of the cone for venting thereof through said steel wool, a hollow strut member of airfoil configuration spanning the annular gas passageway between the exhaust tailpipe and the said cone with substantially all of the externally viewable surfaces of said strut member formed of porous stainless steel material, means to supply cooling air to the interior of said hollow strut member for venting thereof through said porous material, and means to pass cooling air in heat interchange relation with the outer surface of substantially all parts of the exhaust tailpipe whose related inner surface is externally viewable, and a constriction in the exhaust tailpipe located downstream of the hot parts of the engine and serving with the exhaust cone to conceal the hot parts of the engine from external view, whereby the detectible infrared emission of the engine is substantially reduced.
References Cited (Backward Citations)
CA469231A
Cited
US2620623A
Cited
US2591676A
Cited
US2825204A
Cited
US2811827A
Cited
US2789416A
Cited
US2785878A
Cited
US2857119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |