US2956866A - Fuel jettison valve - Google Patents

Fuel jettison valve Download PDF

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Publication number
US2956866A
US2956866A US667729A US66772957A US2956866A US 2956866 A US2956866 A US 2956866A US 667729 A US667729 A US 667729A US 66772957 A US66772957 A US 66772957A US 2956866 A US2956866 A US 2956866A
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United States
Prior art keywords
valve
lever
valve body
time
hydrogen peroxide
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US667729A
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Willard K Dick
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Individual
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Priority to US667729A priority Critical patent/US2956866A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D37/00—Arrangements in connection with fuel supply for power plant
    • B64D37/02—Tanks
    • B64D37/14—Filling or emptying
    • B64D37/20—Emptying systems
    • B64D37/26—Jettisoning of fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
    • F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
    • F02K9/44—Feeding propellants
    • F02K9/56—Control
    • F02K9/566—Control elements and safety devices, e.g. pressure relief valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S422/00—Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing
    • Y10S422/90—Decreasing pollution or environmental impact

Definitions

  • This invention relates to a valve system for jettisoning tuels from balloon, rocket or other carriers where the descent of the carrier with unspent fuel would be hazardous. Specifically, the invention relates to a valve for dumping hydrogen peroxide from a carrier after a given lapse of time, or after ascent to a predetermined altitude.
  • This invention is directed .to a valve and catalyst arrangement which is calculated to jettison hydrogen peroxide to decompose the same to about 50% concentration and to utilize the released heat to keep the vent ice tree.
  • 2 is the inlet pipe trom the fuel tank.
  • pipe enters body 4 of the valve through coupling 3.
  • the valve casing 4 contains a centered needle valve 5 which seats in and closes orifice 6.
  • Needle valve 5 is operated through toggle lever 7 which projects through a slot in plate 8, which plate serves as a tulcrum for the lever.
  • the inner end of toggle lever 7 rests in a slot 9 in the needle valve body and is opened and closed by movement of the outer end of lever 7.
  • Polyethylene sheath 10 encloses lever 7 and is itself sealed to the valve casing by means of compression nut 11.
  • Clip 12 is pivoted at 14- and envelops the end of the sheath and lever and serves to actuate the same through the relay shown.
  • a spring 20 attached to lever 12 serves to bias the needle valve to the closed position to prevent leakage.
  • the peroxide passes through coupling 15, plastic tubing 16 and into catalyst chamber 17.
  • the chamber is filled with a catalyst comprising fine aluminum turnings 18. Screen orifices 19 pass the peroxide and decomposition products to the atmosphere.
  • the relay is actuated by a time switch or minimum altitude switch which lifts needle valve 5 thereby permitting the unspent peroxide to pass on into the catalyst chamber.
  • the large contact surface plus the catalytic activity of the aluminum turnings quickly decomposes the peroxide to about 50%.
  • the heat liberated by this decomposition serves to keep the orifices 19 :free from ice despite the low temperature which may prevail.
  • the products of decomposition are emausted in a time spray and are at a concentration sufiiciently low to prevent fires when reaching the ground.
  • a hydrogen peroxide jettison valve for application to airborne objects comprisiny a valve body, a valve seat in said valve body, a lever operated needle valve positioned in cooperation with said valve seat, said lever protruding through a fulcrum in the side of said valve body, flexible sealing means positioned over said lever thereby sealing valve interior trom the atmosphere, a pivoted toggle arm positioned to grip the end of said lever, time and altitude sensitive means in parallel for actuating said toggle arm through a relay circuit, said means becoming operative latter a given lapse of time and atter descent to a preset minimum altitude, a catalyst chamber positioned in series with and below said valve so that the jettisoned hydrogen peroxide passes through said chamber before reaching the atmosphere.

Description

United States FUEL JETTISON VALVE Filed June 24, 1957, Ser. No. 667,729
3 Claims. (Cl. 23-288) This invention relates to a valve system for jettisoning tuels from balloon, rocket or other carriers where the descent of the carrier with unspent fuel would be hazardous. Specifically, the invention relates to a valve for dumping hydrogen peroxide from a carrier after a given lapse of time, or after ascent to a predetermined altitude.
In utilizing fuels such as hydrogen peroxide in an automatic airborne vehicle, a considerable problem arises with respect to excess or unspent hydrogen peroxide especially when it is desired to dispose thereof at high altitudes or in cold weather.
It will be noted that 90% peroxide treezes at -11 C., and Water, which is one of the decomposition products, treezes at C. It will accordingly be evident that it is highly undesirable because of freezing characteristics alone to jettison either the concentrated or Wholly decomposed peroxide. A 50% concentration of hydrogen peroxide on the other hand has a freezing point of about --52 C. This concentration has the additional advantage of being below the point at which fires might occur therefrom.
This invention is directed .to a valve and catalyst arrangement which is calculated to jettison hydrogen peroxide to decompose the same to about 50% concentration and to utilize the released heat to keep the vent ice tree.
In the drawing, 2 is the inlet pipe trom the fuel tank. pipe enters body 4 of the valve through coupling 3. The valve casing 4 contains a centered needle valve 5 which seats in and closes orifice 6. Needle valve 5 is operated through toggle lever 7 which projects through a slot in plate 8, which plate serves as a tulcrum for the lever. The inner end of toggle lever 7 rests in a slot 9 in the needle valve body and is opened and closed by movement of the outer end of lever 7. Polyethylene sheath 10 encloses lever 7 and is itself sealed to the valve casing by means of compression nut 11.
Clip 12 is pivoted at 14- and envelops the end of the sheath and lever and serves to actuate the same through the relay shown. A spring 20 attached to lever 12 serves to bias the needle valve to the closed position to prevent leakage. After passing the valve aperture, the peroxide passes through coupling 15, plastic tubing 16 and into catalyst chamber 17. For purposes of this invention, the chamber is filled with a catalyst comprising fine aluminum turnings 18. Screen orifices 19 pass the peroxide and decomposition products to the atmosphere.
In operation, the relay is actuated by a time switch or minimum altitude switch which lifts needle valve 5 thereby permitting the unspent peroxide to pass on into the catalyst chamber. Here the large contact surface plus the catalytic activity of the aluminum turnings quickly decomposes the peroxide to about 50%. The heat liberated by this decomposition serves to keep the orifices 19 :free from ice despite the low temperature which may prevail. Simultaneously the products of decomposition are emausted in a time spray and are at a concentration sufiiciently low to prevent fires when reaching the ground.
I claim:
1. A hydrogen peroxide jettison valve for application to airborne objects comprisiny a valve body, a valve seat in said valve body, a lever operated needle valve positioned in cooperation with said valve seat, said lever protruding through a fulcrum in the side of said valve body, flexible sealing means positioned over said lever thereby sealing valve interior trom the atmosphere, a pivoted toggle arm positioned to grip the end of said lever, time and altitude sensitive means in parallel for actuating said toggle arm through a relay circuit, said means becoming operative latter a given lapse of time and atter descent to a preset minimum altitude, a catalyst chamber positioned in series with and below said valve so that the jettisoned hydrogen peroxide passes through said chamber before reaching the atmosphere.
2. A valve in accordance with claim 1 wherein the flexible sealing means includes a polyethylene jacket covering said lever.
3. A valve in accordance with claim 1 wherein the catalyst chamber is filled with finely divided aluminum.
References Cited in the file of this patent UNITED STATES PATENTS 1,329,584 De Marinis Feb. 3, 1920 1,396,809 Camell Nov. 15, 1921 1,887,235 Cornelius Nov. 8, 1932 2,634,745 Cornelius Apr. 14, 1953

Claims (1)

1. A HYDROGEN PEROXIDE JETTISON VALVE FOR APPLICATION TO AIRBORNE OBJECTS COMPRISING A VALVE BODY, A VALVE SEAT IN SAID VALVE BODY, A LEVER OPERATED NEEDLE VALVE POSITIONED IN COOPERATION WITH SAID VALVE SEAT, SAID LEVER PROTRUDING THROUGH A FULCRUM IN THE SIDE OF SAID VALVE BODY, FLEXIBLE SEALING MEANS POSITIONED OVER SAID LEVER THEREBY SEALING VALVE INTERIOR FROM THE ATMOSPHERE, A PIVOTED TOGGLE ARM POSITIONED TO GRIP THE END OF SAID LEVER, TIME AND ALTITUDE SENSITIVE MEANS IN PARALLEL FOR ACTUATING SAID TOGGLE ARM THROUGH A RELAY CIRCUIT, SAID MEANS BECOMING OPERATIVE AFTER A GIVEN LAPSE OF TIME AND AFTER DESCENT TO A PRESET MINIMUM ALTITUDE, A CATALYST CHAMBER POSITIONED IN SERIES WITH AND BELOW SAID
US667729A 1957-06-24 1957-06-24 Fuel jettison valve Expired - Lifetime US2956866A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026082A (en) * 1959-09-29 1962-03-20 West Base Company Control valve
US5549259A (en) * 1994-02-17 1996-08-27 Herlik; Edward C. Innovative airtankers and innovative methods for aerial fire fighting
US5746397A (en) * 1996-06-14 1998-05-05 Defield; Topper Aircraft defueling system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329584A (en) * 1920-02-03 de marin
US1396809A (en) * 1919-05-26 1921-11-15 Lyonnaise Des Rechauds Catalyt Apparatus for heating by catalysis
US1887235A (en) * 1930-06-11 1932-11-08 Wolverine Brass Works Valve mechanism
US2634745A (en) * 1949-07-29 1953-04-14 Richard T Cornelius Cooling device for faucets

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1329584A (en) * 1920-02-03 de marin
US1396809A (en) * 1919-05-26 1921-11-15 Lyonnaise Des Rechauds Catalyt Apparatus for heating by catalysis
US1887235A (en) * 1930-06-11 1932-11-08 Wolverine Brass Works Valve mechanism
US2634745A (en) * 1949-07-29 1953-04-14 Richard T Cornelius Cooling device for faucets

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026082A (en) * 1959-09-29 1962-03-20 West Base Company Control valve
US5549259A (en) * 1994-02-17 1996-08-27 Herlik; Edward C. Innovative airtankers and innovative methods for aerial fire fighting
US5746397A (en) * 1996-06-14 1998-05-05 Defield; Topper Aircraft defueling system

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