What is the mechanism of the ejection seats

DE60016300T2 - Ejection Seat - Google Patents

Ejection seat download PDF

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Publication number
DE60016300T2
DE60016300T2DE2000616300DE60016300TDE60016300T2DE 60016300 T2DE60016300 T2DE 60016300T2DE 2000616300 DE2000616300 DE 2000616300DE 60016300 TDE60016300 TDE 60016300TDE 60016300 T2DE60016300 T2DE 60016300T2
Authority
DE
Germany
Prior art keywords
ejection seat
seat
ejection
inflatable
inflatable curtain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE2000616300
Other languages
English (en)
Other versions
DE60016300D1 (de
Inventor
Steven Anthony George Chesham Ruff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Martin Baker Aircraft Co Ltd
Original assignee
Martin Baker Aircraft Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to GB9906987priorityCritical
Priority to GBGB9906987.4Aprioritypatent / GB9906987D0 / en
Application filed by Martin Baker Aircraft Co Ltd filedCriticalMartin Baker Aircraft Co Ltd
Publication of DE60016300D1publicationCriticalpatent / DE60016300D1 / de
Application granted granted Critical
Publication of DE60016300T2publicationCriticalpatent / DE60016300T2 / de
Anticipated expirationlegal-statusCritical
Expired - Lifetimelegal-statusCriticalCurrent

Left

  • 210000000614RibsAnatomy0.000claimsdescription3
  • 210000003414ExtremitiesAnatomy0.000description7
  • 239000007789gasSubstances0.000description5
  • 206010022114InjuryDiseases0.000description3
  • 239000000567combustion gasSubstances0.000description2
  • 230000000875correspondingEffects0.000description2
  • 239000000789fastenerSubstances0.000description2
  • 208000009801Neck InjuryDiseases0.000description1
  • 238000010276constructionMethods0.000description1
  • 239000002360explosiveSubstances0.000description1
  • 230000014759 maintenance of locationEffects0.000description1
  • 230000001681protectiveEffects0.000description1
  • 238000000926 separation methodMethods0.000description1
  • 230000035939shockEffects0.000description1

Classifications

    • B — PERFORMING OPERATIONS; TRANSPORTING
    • B64-AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D — EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D25 / 00 — Emergency apparatus or devices, not otherwise provided for
    • B64D25 / 02 — Supports or holding means for living bodies
    • B — PERFORMING OPERATIONS; TRANSPORTING
    • B64-AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D — EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D25 / 00 — Emergency apparatus or devices, not otherwise provided for
    • B64D25 / 08 — Ejecting or escaping means
    • B64D25 / 10 - Ejector seats

Description

  • This invention relates to an ejection seat and, more particularly, to an ejection seat having a gust protection system.
  • Ejection seats are commonly used in military aircraft where the risk of aircraft failure or damage in combat is high. Ejection seats allow the flight crew to escape from the affected aircraft and typically provide a safe and reliable means of escape.
  • Ejection seats have long been provided with arm and leg restraint systems which serve to secure the arms and legs of the flight crew in a safe position during ejection. Of course, during normal flight the aircraft crew must be allowed to have their arms and legs free to control the aircraft. However, during ejection, it is important to move the flight crew's arms and legs to a safe position and to secure the arms and legs in that position to avoid injuries that can be caused by either limbs flying around and the side of the cockpit hit or as a result of the inertia that would be suffered from the outstretched limbs. When the ejector seat leaves the aircraft, the forward speed of the aircraft exposes the occupant to a violent gust of wind which will cause further limb flying around unless that person's limbs are buckled up. Like limb injuries, neck injuries are also a hazard. For example, some ejection seats provide neck restraint systems that secure the head of the aircraft crew in a safe position during ejection.
  • An important disadvantage of the arm and leg restraint systems and neck restraint systems currently available is that it is necessary for the flight crew to apply the restraint systems themselves or to connect to them by hand. The difficulty of this task comes along with the fact that the flight crew is likely to be wearing cumbersome NBC protective clothing. Help is therefore usually required so that the flight crew is properly connected to the restraint system.
  • During ejection, the flight crew and ejection seat combination does not present a very aerodynamic profile and therefore suffers from a fairly high coefficient of drag. The lower the mass of the person occupying the ejection seat, the greater the deceleration that is experienced during the ejection. For this reason, people with a lower mass cannot be ejected safely at high speeds and the escape envelope of those with a higher mass is limited.
  • U.S. Patent No. 4,592,523 discloses an ejector seat restraint system which employs an inflatable member to move a net into a restraint position around a person's body when the seat is thrown out with the intention of restraining the person's limbs and head.
  • It is an object of the present invention to seek to alleviate or overcome the problems associated with the foregoing problems associated with ejection seats and restraint systems therefor.
  • Accordingly, the present invention provides an ejector seat with a gust protection system comprising an inflatable curtain stowed on the ejector seat and deployable to substantially envelop at least one occupant of the seat, the ejector seat having two sides and the inflatable curtain along one side of the ejection seat is stowed for deployment over the front of the ejection seat from one side to the other.
  • Suitably a fastener is provided for attaching one edge of the inflatable curtain to the other side of the ejector seat after deployment.
  • Alternatively, another inflatable curtain is stowed along the other side of the ejection seat for deployment over the front of the ejection seat to one side.
  • Suitably a fastening means is provided for fastening an edge of the inflatable curtain to an edge of the further inflatable curtain.
  • The fastening means preferably comprises a hook and eye fastening system.
  • Advantageously, the inflatable curtain is stowed in a container which is attached to the ejection seat.
  • Suitably the container is provided with a slot through which the inflatable curtain can be deployed.
  • Alternatively, the container is provided with a pre-weakened area which is breakable when the inflatable curtain is deployed to allow the curtain to break out through the pre-weakened area.
  • Suitably the inflatable curtain includes an inflatable frame that defines the shape of the inflatable curtain and improves the rigidity of the same.
  • Advantageously, the inflatable frame comprises a plurality of inflatable ribs.
  • In order to better understand the present invention, embodiments thereof will now be described, by way of example, with reference to the accompanying drawings, in which:
  • Figure 3 is a perspective view of an ejection seat embodying the present invention and a person seated in the ejection seat; and
  • Figure 3 is a perspective view of another ejection seat with a gust shield system deployed and not within the scope of the invention.
  • Referring to Figure 4, an ejector seat embodying the present invention includes a generally horizontal seat section, a reclined, nearly vertical seat back, a headrest, and a gust shield system. With the exception of the inclusion of the wind protection system, the ejection seat is based on the construction of conventional ejection seats, as are the fasteners with which the ejection seat is attached to the aircraft. A person O is shown sitting in the ejection seat.
  • In the illustrated example shown in FIG. 4, the wind blast protection system comprises a pair of elongated containers which are attached to opposite sides of the ejection seat and which substantially follow the contours of the side of the ejection seat, i.e. along the front edge of the seat section, along the horizontal seat section and then along the backrest.
  • The container has an elongated slot formed along its length. With respect to the ejection seat, the slot faces forward.
  • Referring now to Figures 10 and 11, each container includes a pyrotechnic charge, an ignition mechanism (not shown) and an inflatable curtain. The inflatable curtain is tightly folded and packed in the container to take up the minimum space.
  • An ejection control system controls the ejection sequence and thus controls the ejection of the ejection seat from the aircraft and synchronizes the removal of the canopy by explosive detachment or other means with the ejection of the seat in order to minimize the possibility of a collision between the canopy and the person occupying the seat. In an ejection seat embodying the present invention, the ejection control system is also operable to send an ignition signal to the ignition mechanism in each of the containers so that the gust protection system can be deployed during the ejection sequence. The ignition signal triggers the ignition mechanism in each container, which ignites the pyrotechnic charge. The pyrotechnic charges quickly generate combustion gases which fill the respective inflatable curtains, forcing the curtains out of the corresponding elongated slots in the containers. It takes about milliseconds for the curtains to inflate fully.
  • In the unfolded condition shown in Fig. 12, which does not fall within the scope of the invention, the curtains protrude from the elongated containers and envelop the occupant of the seat with the leading edges of the two curtains meeting in the middle. In this way, the person's limbs and head are kept in safe positions within the curtains and are protected from injury during being thrown out.
  • The inflatable structure defined by the two curtains is essentially rigid when inflated. The rigidity of the structure can be improved by including an inflatable frame in the curtain. When inflated, the inflatable frame within the curtain, including, for example, inflatable ribs, serves to define the shape of the inflatable structure and add strength to it.
  • Preferably, the leading edges can also be provided with cooperating fastening means to help keep the two edges secured together when the two edges come into contact. For example, a hook and eye fastening system can be used along the edges of the two curtains.
  • In the example described above, the gust protection system is described as being stowed along the sides of the ejection seat for forward deployment and around the person occupying the seat. Other stowage and deployment configurations are possible such as, for example: Side stowage, in which a single curtain is deployed from only one side of the seat, preferably for attachment to the opposite side of the seat.
  • The provision of an inflatable structure around the occupant also serves to provide a lower coefficient of drag for the resulting structure than that which can be obtained for a conventional ejection seat and occupant combination. The reduction in the coefficient of drag of the resulting structure means that lower mass persons can be ejected more safely at speeds which are currently considered unsafe, and existing aircrew will have increased their escape envelope.
  • Instead of using a pyrotechnic charge to generate combustion gases that inflate the curtain, a supply of compressed low molecular weight gas can be used to improve inflation times. The compressed gas supply would preferably be built into the container that houses the inflatable curtain so that the inflation time is not wasted in transporting the gas from the compressed gas supply to the inflatable curtain. A pyrotechnic charge could still be used to open the supply of the compressed gas.
  • The container may be provided with a pre-weakened area along its length in place of the slot. The pre-weakened area can be broken open by the unfolding of the deployable curtain in order to allow the curtain to break out through the pre-weakened area.
  • Instead of a slot or pre-weakened area, a hinged closure can be used, the closure pivoting open to allow the inflatable curtain to deploy.
  • The inflated structure comprising the wind protection system can remain inflated or can be deliberately deflated after being thrown out. In the event that the gust inflation system remains inflated, it is possible to use the inflated structure as a form of liferaft.

Claims (10)

  1. Ejection seat () with a wind protection system comprising an inflatable curtain () which is stowed on the ejection seat () and unfoldable in order to envelop at least essentially one person occupying the seat, the ejection seat () having two sides and the inflatable curtain ( ) is stowed along one side of the ejection seat () for side-to-side deployment over the front of the ejection seat ().
  2. The ejection seat (10) of claim 1, wherein there is provided attachment means for attaching an edge of the inflatable curtain (12) to the other side of the ejection seat (12) after deployment.
  3. The ejection seat (10) of claim 1, wherein a further inflatable curtain is stowed along the other side of the ejection seat (14) for deployment over the front of the ejection seat (14) to one side.
  4. The ejection seat (10) of claim 3, wherein there is a fastener for fastening an edge of the inflatable curtain (12) to an edge of the further inflatable curtain.
  5. The ejection seat (10) of claim 2 or 4, wherein the fastening means comprises a hook and eye fastening system.
  6. The ejection seat (10) of any preceding claim, wherein the inflatable curtain (10) is stowed in a container (10) attached to the ejection seat (10).
  7. The ejection seat (10) of claim 6, wherein the container (10) is provided with a slot (10) through which the inflatable curtain (10) can be deployed.
  8. The ejection seat (10) of claim 6, wherein the container (10) is provided with a pre-weakened area which is breakable upon deployment of the inflatable curtain (10) to allow the curtain to be broken through the pre-weakened area.
  9. The ejection seat (10) of any preceding claim, wherein the inflatable curtain (10) includes an inflatable frame that defines the shape of the inflatable curtain and improves the rigidity thereof.
  10. The ejection seat of claim 9, wherein the inflatable frame has a plurality of inflatable ribs.
DE20006163001999-03-252000-02-18 Ejection seat Expired - LifetimeDE60016300T2 (de)

Priority Applications (2)

Application NumberPriority DateFiling dateTitle
GB99069871999-03-25
GBGB9906987.4AGB9906987D0 (en) 1999-03-251999-03-25An ejection seat

Publications (2)

ID = 10850409

Family Applications (1)

Application NumberTitlePriority DateFiling date
DE2000616300Expired - LifetimeDE60016300T2 (de) 1999-03-252000-02-18Ejection seat

Country Status (5)

Families Citing this family (8)

Publication numberPriority datePublication dateAssigneeTitle
US6422512B1 (en) *1999-08-312002-07-23Goodrich CorporationInflatable restraint systems for ejection seats
US7271713B2 (en) *2003-08-122007-09-18Trase, Inc.Digital automatic escape system
WO2010039119A1 (en) *2008-09-302010-04-08Sikorsky Aircraft CorporationPyrotechnic egress system
WO2014190401A1 (pt) *2013-05-312014-12-04Kisberi FabioCápsula de proteção para poltrona de aeronaves, e veículos em general
US10518733B2 (en) *2017-08-182019-12-31Ford Global Technologies, LlcSeat with airbag
US10926733B2 (en) *2018-03-122021-02-23Ford Global Technologies, LlcVehicle including inflatable assembly supported by seat
CN108891610A (zh) *2018-07-172018-11-27胡建一种 载人 无人机 和 直升机 用 逃生 伞 椅
US10946826B2 (en) *2018-10-102021-03-16Ford Global Technologies, LlcVehicle seat and airbag

Family Cites Families (13)

Publication numberPriority datePublication dateAssigneeTitle
US3218103A (en) *1964-02-271965-11-16William C BoycePneumatic restraint system
US3623768A (en) *1970-08-051971-11-30Stanford Research InstVehicular safety seat
US3713695A (en) *1971-08-271973-01-30Wimmersperg H FromSafety device for restraining passengers
US3981518A (en) *1975-05-051976-09-21Liberty Mutual Insurance CompanyVehicle restraint system
SE390405B (sv) *1976-01-281976-12-20Saab Scania Ab ARM HOLDING DEVICE AT CATAPULT CHAIRS
US4508294A (en) *1983-05-021985-04-02The United States Of America As Represented By The Secretary Of The NavyAir bag restraint system
US4592523A (en) *1984-09-281986-06-03The Boeing CompanyEjection seat restraint system for limbs and head
US4667902A (en) *1984-11-021987-05-26The United States Of America As Represented By The Secretary Of The NavyPassive arm retention curtain
US4749153A (en) *1985-09-301988-06-07The Boeing CompanyEjection seat stabilizing apparatus and method
US5067671A (en) *1990-02-261991-11-26McDonnell Douglas CorporationAnti tip-off ejection rails
US5301903A (en) *1993-04-061994-04-12Grumman Aerospace CorporationOccupant arm and head restraining assembly
US5498022A (en) *1994-06-271996-03-12Izumi CorporationVehicle interior with color coordinated substrate
US5676393A (en) *1996-08-061997-10-14Morton International, Inc.Protective cover for airbag module

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