US3602661A - Immersion responsive sensor - Google Patents

Immersion responsive sensor Download PDF

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Publication number
US3602661A
US3602661A US882645A US3602661DA US3602661A US 3602661 A US3602661 A US 3602661A US 882645 A US882645 A US 882645A US 3602661D A US3602661D A US 3602661DA US 3602661 A US3602661 A US 3602661A
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United States
Prior art keywords
intermediate portion
water
immersion
battery
wall members
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Expired - Lifetime
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US882645A
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English (en)
Inventor
Karl-Gosta Liedberg
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Saab AB
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Saab Scania AB
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C9/00—Life-saving in water
    • B63C9/24—Arrangements of inflating valves or of controls thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2209/00—Energy supply or activating means
    • B63B2209/02—Energy supply or activating means water activated switches

Definitions

  • the immersion responsive sensor of an automatically inflatable life jacket comprises concentric inner and outer tubular electrodes, the outer one having water access apertures at zones spaced axiallyvfrom the ends of the inner one.
  • the outer one comprises part of a housing that encloses a battery. Seal means extend across the outer electrode in axially spaced relation to the inner one and have frustoconical inner surfaces that drain water toward the apertures.
  • the immersion responsive sensor is of course a critical part of the automatic inflation apparatus. Unless it functions reliably in an emergency, the jacket may not inflate. and the wearer may lose his life. On the other hand, if the sensor initiates inflation at a time when it should not do so, as in the presence of rain or salt water spray, the inflated jacket may so impede the wearer's activities that its very presence endangers his safety.
  • the senor comprises a pair of spaced-apart electrodes that are connected in an electrical circuit comprising the battery and the switch or amplifier.
  • the sensor When the sensor is immersed, water provides a conductive path between the electrodes, permitting a small control current to flow in the electric circuit.
  • a larger energizing current is then caused to flow in a circuit comprising the battery and the squib igniter or other electrical actuator, thus triggering off the short sequence of events that leads to inflation of the life jacket.
  • the space between the electrodes of the sensor is relied upon to afford such a high resistance in the circuit comprising the battery and the amplifier that the current flowing therein is at most so small as to be negligible.
  • the squib When the sensor is immersed, the current through it must be high enough to initiate ignition of the squib, regardless of whether it is immersed in salt water, which is a relatively good conductor of current, or in fresh water which conducts-current rather poorly. When not immersed, the sensor should preferably have an effectively infinite resistance, so
  • the senor should have such practically infinite resistance even when it is subjected to conditions of extreme atmospheric humidity, and to rain, fog and salt spray, for otherwise it can cause an unexpected and undesired inflation of the life jacket.
  • the squib not only must the sensor be able to discriminate between immersion in fresh water and mere exposure to salt spray, but when the apparatus produces an output that initiates life jacket inflation, it must be such an output as will insure ignition of the squib, irrespective of the response current value of the particular squib.
  • Squibs commonly used for life jacket inflation devices vary widely in their ignition current requirements. The minimum current required for ignition of one squib may be as much as twice as high as the minimum current needed for ignition of another. Therefore the only sure way to effect ignition of a particular squib is to supply its igniter with a current no lower than is adequate to fire a squib having the highest minimum ignition current requirement.
  • an automatic inflation initiating device for a life jacket must be capable of a rather close discrimination with respect to the conditions of its environment, but it must either permit no current flow or, when its sensor is immersed, it must cause enough current to flow to the squib igniter to fire a squib having the highest expectable ignition temperature.
  • an immersion responsive device for initiating automatic inflation of a life jacket or the like, having a sensor which allows no current to flow in its electrical circuits at-times when the sensor is not immersed, even under conditions of high humidity including rain and salt spray, but which, when its sensor is immersed in either salt water or fresh water, provides a high enough ignition current flow to fire any acceptable squib.
  • Another and more specific object of this invention is to provide an immersion responsive sensor which tends to rid itself of any accumulation of water that develops from causes other than immersion, such as rain, fog and spray; and which, moreover, responds only to the presence 'of a coherent body of water between the sensor electrodes, as distinguished from a film of water or mere drops, but which nevertheless does not require complete and total immersion in water to cause inflation to be initiated.
  • F 1G. 1 is a front view of a life jacket embodying the principles of this invention, shown being worn and in its normal uninflated condition;
  • HO. 2 is a vertical sectional view of the inflating and inflation initiating mechanism of the life jacket
  • FIG. 3 is a diagram ofthe electrical circuit of the immersion responsive inflation initiating mechanism.
  • FIG. 4 is an enlarged detail view of a modified embodiment of the sensor,shown partly in side elevation and partly in section.
  • the numeral S designates generally an inflatable life vest or life jacket embodying the principles of this invention, which is generally U- shaped to have its bight portion around the back of the wearer's neck and its leg portions extending downwardly and overlying his chest.
  • a strap 6 extending transversely to the leg portions of the jacket and secured to them near their lower free ends is fastened around the wearer's waist to secure the device to him.
  • the life jacket In its normal uninflated condition, shown in FIG. 1, the life jacket is folded to a substantially flat condition, close to the wearer's body, and it therefore offers little or no interference to bodily movements. When inflated, it distends to a condition in which it can bouyantly support the upper portion of the wearerbody and keep his head out of water.
  • the jacket comprises an outer tubelike envelope of fabric which encloses and protects an inflatable bladder.
  • a zipper 7 on the envelope, extending lengthwise all around it, can be opened for ready access to the bladder.
  • the activating mechanism for the jacket is carried in a pocket 8 formed in the fabric envelope at one side thereof.
  • a manual inflation control knob 9 hangs down from the mechanism on a short cord 10 to be accessible beneath the pocket for manual initiation of inflation by a downward pull on the knob 9.
  • the device is also capable of effecting automatic inflation of the jacket in consequence of immersion of the mechanism in a body of water.
  • the activating mechanism in the pocket 8, which is designated generally by 12, is best seen in FIG. 2. It comprises, in general, a body or base casting 14 which supports a pressure gas bottle 15, a puncturing pin 16, an actuating'lever 18, a sensor 19, a battery 20, and electrical circuit means 23 responsive to immersion of the sensor.
  • the bottle 15 which contains a charge of gas (e.g., carbon dioxide) under high pressure, is secured to the base casting 14 with its mouth downward and opening to one end of a generally U-shaped passage 21 in the base casting.
  • a charge of gas e.g., carbon dioxide
  • the mouth of the bottle is normally sealed by a frangible diaphragm that is intended to be ruptured, for jacket inflation, by the puncturing pin 16, which is arranged to slide up and down in the upright portion of the U-shaped passage 21 that is directly beneath the bottle.
  • the puncturing pin to is pointed at its upper end and has a shoe at its lower end that engages one arm 25 of the actuating lever 18.
  • the actuating lever is medially fulcrumed on a pivot 26 secured in the casting l4, and it has its other arm 28 engaged by a plunger 29 to which the upper end of the cord 10 is secured.
  • the plunger 29 When the plunger 29 is moved downwardly, either by a manual pull on the cord 10 or by operation of the automatic mechanism described hereinafter, it swings the arm 28 of the lever 18 downwardly, and concomitantly swings the arm 25 of said lever upwardly, thereby driving the pin 16 up into rupturing engagement with the diaphragm in the mouth of the bottle.
  • the gas thus released from the bottle flows through the U- shaped passage 21 in the base casting to an outlet nipple 30 that has a sealed connection with the bladder, whence it flows into the bladder to inflate the same.
  • a feature of the activating mechanism of the invention is a condition indicator that is visible through a small window 31 in the base casting.
  • the condition indicator comprises a rotor 32 which has an axially wide rim 33 extending part way around it and which is mounted for rotation on a pin 34 that is fixed in the base casting.
  • the rotor 32 is biased in one direction of its rotation by means of a small spring 35.
  • the puncturing pin 16 When the puncturing pin 16 is in its normal position, it ongages a noncircular peripheral portion of the rotor 32 to confine the rotor against turning in response to the bias of the spring 35. and at such times a green colored area on the rim 33 of the rotor is in register with the window 31 to provide a visible indication that the mechanism is safely available for use.
  • the puncturing pin When the puncturing pin is raised into rupturing engagement with the diaphragm, it releases the rotor 32 for spring propelled rotation through a predetermined fraction of a turn, by which a red colored area on the rotor rim 33 is brought into register with the window 31', to signify that the bottle has been discharged and should be replaced before the life jacket is used.
  • an explosive squib 37 Seated in the base casting just above the plunger 29 is an explosive squib 37 that is fired for automatic inflation.
  • the sensor 19 When the sensor 19 is immersed in water, current is caused to flow from the battery 20 to an igniter for the squib. The pressure gases generatedby the squib when it is thus fired drive the plunger 29 downward and thus effect rupturing of the gas bottle diaphragm.
  • the battery 20 and the electrical circuit means 23 are enclosed in an elongated cylindrical housing member 40 which also comprises a part of the sensor 19.
  • the housing member 40 is an upright, axially elongated shell having a generally cylindrical sidewall 41 and an end wall 42 at its top. At its bottom the cylindrical sidewall 41 of the housing member surrounds a headset, 39 on the base casting in which the squib is received, and it has a sealing engagement with the casting. Just above the squib there is a compartment in the housing member in which are located the electrical circuit means '23.
  • the battery 20 (which can be of the nickel-cadmium type or a similar type having a long shelf acute is enclosed in the upper end portion of the housing member with one of its terminals engaging the end wall 42 to make an electrical connection therewith, said end wall preferably having a central downwardly depressed dimple, as at 43, to insure good contact with the terminal.
  • Themedial portion of the housing sidewall 41, between the battery and the electrical circuit means, comprises an outer electrode 46 of the immersion sensor 19.
  • an inner tubularelectrode 47 that is rigidly held in concentric relation to the outer one by means of generally upright posts 49 that are secured at their bottoms in one of a pair of electrically insulating seal members 50 and 51.
  • the seal members extend across thehousing member 40 in axially spaced relation to the inner electrode and thus define a sensor compartment in the housing.
  • Each of the seal members is preferably made of a water repellent nonhygroscopic plastic insulating material, such as'nylon or Teflon, and has an inner frustoconical surface 52 that is inclined radially and axially outwardly.
  • the latter has a plurality of holes 53 through which water can enterthe sensor compartment.
  • the frustoconical inner surfaces 52 of the seal members encourage rapid drainage of water out of the sensor compartment, through the holes 53, regardless of the orientation of the housing member 40, thus preventing any accumulation of condensate water or the like that might bridge the electrodes.
  • the holes 53 are located in zones spaced axially outwardly from the ends of the inner electrode so that the latter does not interfere with such drainage.
  • the posts 49 that support the inner electrode 47 are disposed radially inwardly of the inner electrode and extend generally parallel to its axis.
  • Each post has its lower end rigidly secured in the lower seal member 51 and has an outwardly curved upper end portion which is secured to the inner elec trode, as by soldering or welding, to have a good mechanical and electrical connection therewith.
  • At least one of the posts comprises a conductor which extends through the lower seal member to provide an electrical connection between the inner electrode and the resistor 44 and thyristor 45 that are housed beneath the lower seal member.
  • the posts 49 are so arranged that any water which might. tend to accumulate on the supporting means for the inner electrode will not be in bridging relation to the two electrodes.
  • the posts 49 are coated with nylon or Teflon to protect them from corrosion and to discourage accumulations of water in the sensor chamber. 7
  • one terminal of the battery 20 is grounded through its engagement with the housing end wall 42.
  • the other battery terminal 48 is connected with the electrical circuit means by means of a rigid conductor 54 that extends coaxially through the sensor compartment.
  • the conductor 54' is insulated from the sensor compartment by tubular tions 50 and '51 and abut one another with a snug sealing engagement so that they protect the conductor from contact with any water that may be in the sensor compartment as well as electrically insulating it.
  • a U-shaped conductive spring contactor 56 is preferably secured to the top of the conductor, above the upper seal member 50, which contactor engages said battery terminal under bias.
  • the upper seal member 50 cooperates with the upper end of the housing member 40 to provide a sealed, waterproof compartment in which the battery is protectively housed
  • the lower seal member 51 cooperates with the lower portion of the housing member and with the boss 39 on the body casting to provide another sealed compartment that houses the electrical circuit means 23
  • the lower seal member can be provided with a downwardly projecting cylindrical sidewall portion 60 that defines a downwardly opening cavity in which the resistor 44 and thyristor 45 are housed, and this cavity can be filled in whole or in part with a plastic encapsulating material to further protect the electrical circuit means.
  • the senor Since the sensor responds to the presence of a coherent quantity of water bridging the annular space between the electrodes 46 and 47, its opposing surfaces should be of a material that is a good electrical conductor and is resistant to corrosion. For this reason the inner surface of the outer electrode and the outer surface of the inner one are preferably silver plated. The radial distance between these surfaces should be not less than about 5 millimeters so that they cannot be bridged by drops of water that form on them as the result of condensation or are deposited on them by rain or spray.
  • the water access holes or ports 53 should not be so large that spray and rain drops that have passed through the fabric of the pocket 8 can readily enter them, but they should be big enough so that water which tries to leave the sensor chamber through ther n is not held by surface tension.
  • the holes 53 can be formed by deforming localized portions of the housing wall outwardly, to produce corbellings 57 like the teeth of a grater that deflect downwardly flowing water away from the holes.
  • the lower corbellings are made somewhat larger than the upper ones, in view of the draining action of the holes.
  • the inner electrode 47 of the sensor is connected with the resistor 44 and with the gate of the thyristor 45, while the anode and cathode of the thyristor are connected in a series circuit with the battery 20 and the igniter 58 for the squib.
  • the thyristor 45 With these characteristics of the thyristor 45 in mind, it will be seen that under normal conditions there will be no current drain whatsoever from the battery 20, and the battery will therefore require only very infrequent attention, depending upon its shelf life or any possible emergency activation of the mechanism. This is because the sensor offers an effectively infinite resistance relative to the battery voltage, so long as the sensor is not immersed in water. Should somehow bridge the sensor electrodes, the inflation mechanism will not be triggered by it, inasmuch as the very tiny current flow through such a small volume of water will not attain the critical gate signal value at which the thyristor is rendered forwardly conductive.
  • the opposing surfaces of the inner and outer electrodes have substantial area, the space between them need not be completely filled with water for the current flow through such water to reach the critical value. This fact permits the sensor to respond to immersion in either salt water or fresh water, inasmuch as fresh water must attain a somewhat higher level in the sensor chamber than salt water in order to effect triggering of the thyristor.
  • this invention provides an automatic inflation mechanism for a life jacket or the like that has a very reliable sensor, not affected by rain, atmospheric humidity or even salt water spray, but which initiates inflation of the life jacket promptly upon being immersed in either fresh water or salt water, and which causes no drain on the battery that energizes the device until actual immersion occurs.
  • sealing means including sealing wall members of electrically insulating material spanning said tubular member and sealed thereto all around it at the ends of said intermediate portion, axially outwardly adjacent to each of said apertured zones, one of said sealing wall members cooperating with said end portion of the tubular member in defining the battery chamber;
  • a rigid inner member means whereby said rigid member is supported by one of said sealing wall members in substantially coaxial radially inwardly spaced relationship to the intermediate portion of the outer tubular member and which extends through a substantial portion of the length of said intermediate portion, said inner member having an electrically conductive outer surface which provides the other of said pair of electrodes.
  • each of said sealing wall members having an axially inner surface which is inclined laterally and axially outwardly from the axis of the outer tubular member, to encourage any water in said intermediate portion to drain out of the same through its apertured end zones.
  • the immersion responsive "1556? claim 1 further characterized by:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Emergency Lowering Means (AREA)
  • Air Bags (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
US882645A 1968-12-09 1969-12-05 Immersion responsive sensor Expired - Lifetime US3602661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE16776/68A SE327924B (enrdf_load_stackoverflow) 1968-12-09 1968-12-09

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US3602661A true US3602661A (en) 1971-08-31

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US882645A Expired - Lifetime US3602661A (en) 1968-12-09 1969-12-05 Immersion responsive sensor

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US (1) US3602661A (enrdf_load_stackoverflow)
JP (1) JPS4843240B1 (enrdf_load_stackoverflow)
DE (1) DE1960650A1 (enrdf_load_stackoverflow)
FR (1) FR2025679A1 (enrdf_load_stackoverflow)
GB (1) GB1288399A (enrdf_load_stackoverflow)
SE (1) SE327924B (enrdf_load_stackoverflow)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096466A (en) * 1977-04-20 1978-06-20 Johnson Dennis J Underwater switching
US4253628A (en) * 1979-11-06 1981-03-03 The United States Of America As Represented By The Secretary Of The Navy Automatic parachute release system
WO1982004232A1 (en) * 1981-05-27 1982-12-09 Steven A Becnel Liquid-sensitive actuator for displacement-responsive devices
US4582494A (en) * 1981-05-27 1986-04-15 Becnel Steven A Protected liquid-sensitive actuator for displacement responsive devices
US4585190A (en) * 1983-11-22 1986-04-29 Autoflug Gmbh Water activated pressurized gas apparatus for rescue applications
FR2609178A1 (fr) * 1986-12-30 1988-07-01 Conax Florida Corp Detecteur de conductivite de fluide
US5034847A (en) * 1988-10-27 1991-07-23 Brain John E Portable light beacon
US5311100A (en) * 1990-11-02 1994-05-10 Errington John Enterprises Ltd. Water-activated survival lamp unit and an improved water-responsive switch therefor
US20100044507A1 (en) * 2005-11-09 2010-02-25 Smith Michael R Crash Attenuation System for Aircraft
WO2010036207A1 (en) * 2008-09-29 2010-04-01 Nanyang Polytechnic Programmable pressure activated floatation trigger device
US20100206983A1 (en) * 2007-10-22 2010-08-19 Cheng-Ho Tho Crash Attenuation System for Aircraft
US20110204181A1 (en) * 2007-10-22 2011-08-25 Hill Andrew T Aircraft Occupant Protection System
US20110226898A1 (en) * 2005-11-09 2011-09-22 Smith Michael R Crash Attenuation System for Aircraft
US20120217263A1 (en) * 2010-11-05 2012-08-30 Stratus Systems Electronic fluid activated release device for life preserver
US20130032665A1 (en) * 2010-12-29 2013-02-07 Bell Helicopter Textron Inc. Active Vent and Re-Inflation System for a Crash Attenuation Airbag
US20130109260A1 (en) * 2010-04-26 2013-05-02 Xg Vault Pte Ltd Underwater activated life jacket inflation system
US20130239937A1 (en) * 2010-11-19 2013-09-19 John G. Macri Rescue and retrieval apparatus and system and method of using same
US8588996B2 (en) 2005-11-09 2013-11-19 Textron Innovations Inc. Aircraft occupant protection system
US9045222B2 (en) 2011-03-30 2015-06-02 Textron Innovations Inc. Constant area vent for external crash attenuation airbag
US9260192B2 (en) 2009-07-27 2016-02-16 Textron Innovations Inc. Active vent and re-inflation system for a crash attentuation airbag
US9487301B2 (en) 2011-02-23 2016-11-08 Textron Innovations Inc. High efficiency external airbag for crash attenuation
US20170057604A1 (en) * 2015-09-02 2017-03-02 Mustang Survival Ulc Stabilizing Cap for Personal Flotation Device
US9841145B1 (en) * 2016-10-26 2017-12-12 Sparton Corporation Axial piercing mechanism for pressurized gas canister
US10908057B2 (en) 2018-09-04 2021-02-02 Microchip Technology Incorporated Activating a submersible sensor based on electrode output, and related systems, methods and devices
US11155325B2 (en) 2019-02-06 2021-10-26 Boost Ideas, Llc Water safety garment, related apparatus and methods
WO2024051053A1 (zh) * 2022-09-05 2024-03-14 吉林省德天诺安全科技有限公司 充气救生衣的电子控制装置及控制方法

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1360212A (en) * 1970-12-21 1974-07-17 Martin J Survival or like packs particularly suitable for airmen
US4024440A (en) * 1975-02-13 1977-05-17 Conax Corporation Water activated pressurized gas release device
JPS50152338A (enrdf_load_stackoverflow) * 1975-02-21 1975-12-08
FR2480393A2 (fr) * 1980-04-14 1981-10-16 Legris Perfectionnement aux robinets a percuteur commandes a distance
DE3124753A1 (de) * 1981-06-24 1983-01-13 Bernhardt Apparatebau Gmbh & Co, 2000 Hamburg Trennvorrichtung fuer ausruestungsteile, insbesondere atemmasken, von fallschirmspringern
GB2130972B (en) * 1982-06-03 1985-09-04 Josef Elmar Bissig Rescue apparatus
FR2569305B1 (fr) * 1984-08-14 1986-12-19 Pyromeca Contacteur electrique declenchable par immersion et dispositif pyrotechnique utilisant un tel contacteur
GB2165977A (en) * 1984-10-04 1986-04-23 Hurtig Karl W Naval rescue optical signalling device
FR2617794A1 (fr) * 1987-07-07 1989-01-13 Godefroy Michel Dispositif de securite pour utilisateurs tombant a l'eau
RU174744U1 (ru) * 2017-03-27 2017-10-31 Акционерное общество "Уфимский завод эластомерных материалов, изделий и конструкций" Устройство газонаполнения для надувных спасательных средств

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096466A (en) * 1977-04-20 1978-06-20 Johnson Dennis J Underwater switching
US4253628A (en) * 1979-11-06 1981-03-03 The United States Of America As Represented By The Secretary Of The Navy Automatic parachute release system
WO1982004232A1 (en) * 1981-05-27 1982-12-09 Steven A Becnel Liquid-sensitive actuator for displacement-responsive devices
US4582494A (en) * 1981-05-27 1986-04-15 Becnel Steven A Protected liquid-sensitive actuator for displacement responsive devices
US4585190A (en) * 1983-11-22 1986-04-29 Autoflug Gmbh Water activated pressurized gas apparatus for rescue applications
FR2609178A1 (fr) * 1986-12-30 1988-07-01 Conax Florida Corp Detecteur de conductivite de fluide
US5034847A (en) * 1988-10-27 1991-07-23 Brain John E Portable light beacon
US5311100A (en) * 1990-11-02 1994-05-10 Errington John Enterprises Ltd. Water-activated survival lamp unit and an improved water-responsive switch therefor
US20100044507A1 (en) * 2005-11-09 2010-02-25 Smith Michael R Crash Attenuation System for Aircraft
US7954752B2 (en) * 2005-11-09 2011-06-07 Bell Helicopter Textron Inc. Crash attenuation system for aircraft
US20110226898A1 (en) * 2005-11-09 2011-09-22 Smith Michael R Crash Attenuation System for Aircraft
US8588996B2 (en) 2005-11-09 2013-11-19 Textron Innovations Inc. Aircraft occupant protection system
US8418957B2 (en) 2005-11-09 2013-04-16 Textron Innovations Inc. Crash attenuation system for aircraft
US20100206983A1 (en) * 2007-10-22 2010-08-19 Cheng-Ho Tho Crash Attenuation System for Aircraft
US20110204181A1 (en) * 2007-10-22 2011-08-25 Hill Andrew T Aircraft Occupant Protection System
US8474753B2 (en) 2007-10-22 2013-07-02 Textron Innovations Inc. Aircraft occupant protection system
US8348192B2 (en) 2007-10-22 2013-01-08 Textron Innovations Inc. Crash attenuation system for aircraft
WO2010036207A1 (en) * 2008-09-29 2010-04-01 Nanyang Polytechnic Programmable pressure activated floatation trigger device
US9260192B2 (en) 2009-07-27 2016-02-16 Textron Innovations Inc. Active vent and re-inflation system for a crash attentuation airbag
US20130109260A1 (en) * 2010-04-26 2013-05-02 Xg Vault Pte Ltd Underwater activated life jacket inflation system
US8721379B2 (en) * 2010-11-05 2014-05-13 Steven A. Becnel Electronic fluid activated release device for life preserver
US20120217263A1 (en) * 2010-11-05 2012-08-30 Stratus Systems Electronic fluid activated release device for life preserver
US20150259056A1 (en) * 2010-11-19 2015-09-17 Peter L. Robbins Rescue and retrieval apparatus and system and method of using same
US20130239937A1 (en) * 2010-11-19 2013-09-19 John G. Macri Rescue and retrieval apparatus and system and method of using same
US9434458B2 (en) * 2010-11-19 2016-09-06 John G. Macri Rescue and retrieval apparatus and system and method of using same
US9056661B2 (en) * 2010-11-19 2015-06-16 John G. Macri Rescue and retrieval apparatus and system and method of using same
US8870115B2 (en) * 2010-12-29 2014-10-28 Textron Innovations Inc. Active vent and re-inflation system for a crash attenuation airbag
US20130032665A1 (en) * 2010-12-29 2013-02-07 Bell Helicopter Textron Inc. Active Vent and Re-Inflation System for a Crash Attenuation Airbag
US9487301B2 (en) 2011-02-23 2016-11-08 Textron Innovations Inc. High efficiency external airbag for crash attenuation
US9045222B2 (en) 2011-03-30 2015-06-02 Textron Innovations Inc. Constant area vent for external crash attenuation airbag
US20170057604A1 (en) * 2015-09-02 2017-03-02 Mustang Survival Ulc Stabilizing Cap for Personal Flotation Device
US9841145B1 (en) * 2016-10-26 2017-12-12 Sparton Corporation Axial piercing mechanism for pressurized gas canister
US10908057B2 (en) 2018-09-04 2021-02-02 Microchip Technology Incorporated Activating a submersible sensor based on electrode output, and related systems, methods and devices
US11155325B2 (en) 2019-02-06 2021-10-26 Boost Ideas, Llc Water safety garment, related apparatus and methods
US11999455B2 (en) 2019-02-06 2024-06-04 Boost Ideas, Llc Water safety garment, related apparatus and methods
WO2024051053A1 (zh) * 2022-09-05 2024-03-14 吉林省德天诺安全科技有限公司 充气救生衣的电子控制装置及控制方法

Also Published As

Publication number Publication date
DE1960650A1 (de) 1970-08-20
JPS4843240B1 (enrdf_load_stackoverflow) 1973-12-17
SE327924B (enrdf_load_stackoverflow) 1970-08-31
FR2025679A1 (enrdf_load_stackoverflow) 1970-09-11
GB1288399A (enrdf_load_stackoverflow) 1972-09-06

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