WO1998028164A1 - Energy absorbing seat arrangement - Google Patents

Energy absorbing seat arrangement Download PDF

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Publication number
WO1998028164A1
WO1998028164A1 PCT/IT1997/000099 IT9700099W WO9828164A1 WO 1998028164 A1 WO1998028164 A1 WO 1998028164A1 IT 9700099 W IT9700099 W IT 9700099W WO 9828164 A1 WO9828164 A1 WO 9828164A1
Authority
WO
WIPO (PCT)
Prior art keywords
bar
sleeve
energy
ribs
seat
Prior art date
Application number
PCT/IT1997/000099
Other languages
French (fr)
Inventor
Maurizio Baldinucci
Original Assignee
Sicamb S.P.A.
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
Application filed by Sicamb S.P.A. filed Critical Sicamb S.P.A.
Priority to AU27873/97A priority Critical patent/AU2787397A/en
Publication of WO1998028164A1 publication Critical patent/WO1998028164A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42709—Seats or parts thereof displaced during a crash involving residual deformation or fracture of the structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/4207—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces
    • B60N2/4242—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces vertical

Definitions

  • the invention concerns devices for absorbing energy produced by some kind of impact, especially applicable to seats in aircraft generally.
  • Such devices must be able to reduce the acceleration so caused to levels compatible with the safety of the occupant.
  • the peak of acceleration that has to be suitably "cut" by absorber devices is about 30g.
  • the integral of the stress-stroke curve represents the quantity of mech- anical energy absorbed.
  • Subject of the invention is an absorber of negative mechanical energy generated by impact with the ground, especially designed for seats in aircraft, composed of two groups, one mounted on the fixed structure of the seat and the other on the actual seating part, rendered mobile in relation to the fixed structure.
  • the two groups are joined by a bar which has longitudinal ribs along most of its length, extending to one end, and by a sleeve that houses the bar so that the middle of the sleeeve lies substantially where the ribs begin.
  • the internal shape of said sleeve is substantially complementary to said area of the bar, and cut through it are rectangular holes shaped at their ends like sharp-edged teeth placed at the point where the ribs begin.
  • the end of the bar opposite to the part with the ribs connects, after passing through the sleeve, with one of the two groups. Said sleeve is connected to the other group.
  • the material used for the ribs on the bar is a good deal softer than the sharp-edged teeth made at the ends of the rectangular holes in the sleeve.
  • the sleeve is fixed to the fixed structure of the seat while the bar is fixed to the mobile part of the seat.
  • the bar, sleeve and one of the two groups are connected by two brackets, each respectively fixed to one of the two groups, said brackets being substantially parallel, opposite one another and orthogonal to the direction of movement of the mobile part of the seat.
  • the diameter of a hole, passed through by the bar, in each of the brackets is less than that of a head screwed on at the end of the bar opposite to the ribbed area, and also less than that of the sleeve.
  • Contact between the brackets and the head to the bar and the sleeve is preferably made by two semi-spherical blocks, of opposing convexity, lodged in the respective complementary seats of annular plates, through which the bar passes, supported by the brackets and making contact with the faces of the brackets turned towards the side of the two groups that move.
  • Said spherical form of the blocks permits compensation of distortion of the fixed and mobile structures of the seat during impact, in relation to alignment of the bar with sleeve, avoiding negative loads of friction.
  • the bar is cylindrical, its ribs are substantially equal and are set at equal radial distances.
  • the bar may be made in a single piece but the ribs on it at least must be of a light alloy or in any case of material suitable for being shaved away for the purpose described above.
  • the bar With the seat in its normal position the bar is fixed to the sleeve by a transversal plug of calibrated shearing strength so that, in the event of an impact, the plug is cut through and the absorber starts operating.
  • Dimensions of the cross section of the ribs on the bar, and at least the material of which they are made, are chosen to comply with the desired absorption of energy according to the different types of use.
  • the invention offers evident advantages.
  • the ratio between absorbed energy and weight is very high. This is an advantage of basic importance in aeronautical applications where weight is obviously decisive.
  • the whole device is very simple, contains a small number of components and offers considerable resistance to environmental conditions . Practically no maintenance is needed since there are no parts that quickly deteriorate such as fluids or delicate materials.
  • the structure can therefore last, without any special attention, for the whole life of aeroplane seats, the known figure being not less than 25 years.
  • Cost is low as components are simple and do not require close working tolerances.
  • the described absorber of energy can be easily adapted to different operative conditions and therefore to the different types of aircraft, in addition - and especially - to helicopters.
  • Fig. 1 Seat for aircraft with the invented energy absorber in its idle position, seen from behind.
  • Fig. 2 Absorber of energy in its idle position, perspective view.
  • Fig. 3 As above, a longitudinal section.
  • Fig. 4 The seat for aircraft in Fig. 1 , when an impact takes place.
  • Fig. 5 Absorber of energy during an impact, perspective.
  • Fig. 6 As above, a longitudinal section.
  • the seat 11 for aircraft comprises a fixed structure 12, fixed to the floor of the aircraft and a mobile structure 13 connected to the absorbers of energy 10, subject of the invention, placed as a pair on either side of the seat.
  • the absorber of energy 10 comprises two main groups 15 and 45.
  • Group 15 is mounted on the fixed structure 12 of the seat while group 45 is fixed to the mobile structure 13.
  • Group 45 comprises a cylindrical aluminium bar 6 with longitudinal ribs 17, and a lower cylindrical part 18, of a diameter substantially the same as that of the bar, between the ribbed part and a lower shank 19.
  • Said shank 19 is screwed onto a semi-spherical block 34, whose upper surface is convex, and is held firm by two nuts 38, 39.
  • Said block 34 supports the plate 35 in which there is a complementary seat 29 and an axial hole 44 through which the ribbed bar 16 can freely pass.
  • the discoid plate 35 makes contact against the right-angled bracket 36 fixed to the mobile part 13 of the seat 11 by screws 14.
  • the group 15 comprises the sleeve 20 into which the bar 16 fits.
  • the internal upper part of said sleeve is substantially complementary to said bar 16 and rectangular holes 21 are cut through it at the position of the ribs 17 on the bar.
  • the lower end of each hole 21 is shaped like a sharp-edged tooth 23 and is placed at the starting point of each rib 17.
  • the sleeve 20 is supported, in a seat 25 cut for it, by a semi-spherical axial block 30, with downward facing convexity and having a hole 27 the diameter of which is greater than that of the bar 16 between ribs.
  • Said semi-spherical block 30 in turn lies in a complementary seat 26 of a plate 31 with an axial hole 28 in it of a diameter greater than that of the bar 16, supported by a right-angled bracket 33, mounted on the fixed part of the seat 12 by screws 14.
  • Said plate 31 is inserted in the hole 32 in said bracket 33 and its edge 41 makes contact with the edge of said hole 32 in the bracket.
  • a discoid spacer 37 is placed between the two right-angled brackets 33, 36, there being in said spacer a central hole 42 of a diameter greater than that of the bar 16.
  • the semi-spherical blocks 30, 34 serve to compensate distorsion of the fixed 12 and mobile 13 structures of the seat 11 during an impact and thus keep the bar 16 aligned in relation to the sleeve 20 avoiding creation of undesirable loads of friction.
  • the sleeve 20 is held firm on the ribbed bar 16 by an elastic transversal plug 24 to maintain adequate seat stability during normal flying. In the event of an impact, as soon as the value that sets off the absorption system is exceeded, the forces acting against the seat cut through the transversal plug 24 and allow the seat to move down towards the floor of the aircraft. This downward movement is however prevented by the teeth 23 on the sleeve 20 that act like a real cutting tool on the ribs 17 of the bar 16, to remove the shavings 40.
  • Said shavings are expelled through the holes 21 in the sleeve 20.
  • the cutting force needed to shear off the shavings provides the resistance that leads to absorption of energy.
  • Thickness, position of the ribs and the material of the bar must be suited to the various uses made of the absorber and therefore to the different types of aircraft, especially helicopters.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Dampers (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

Absorber (10) of negative mechanical energy generated by an impact with the ground for seats (11) in aircraft, composed of a group (15) fixed to the mobile part (12) of the seat and comprising a bar (16) down which are longitudinal ribs (17) of aluminium alloy, and of a second group (45) fixed to the fixed structure (13) of the seat comprising a sleeve (20) round the bar, in which sleeve are axial rectangular holes (21) whose ends, matching with the starting position of the ribs, are shaped as sharp-edged teeth (23), so that when, following impact, the mobile part of the seat suddenly moves towards the fixed structure, energy from acceleration is absorbed into the energy needed to enable the teeth in the holes in the sleeve, acting as real cutting tools, to cut away, from the ribs in the bar, shavings (40) which are then expelled through said holes.

Description

ENERGY ABSORBING SEAT ARRANGEMENT
The invention concerns devices for absorbing energy produced by some kind of impact, especially applicable to seats in aircraft generally.
The seats for pilots and passengers in aeroplanes and helicopters, both military and civil, and in aircraft generally must, as is well-known, be equipped with devices that can automatically absorb negative mechanical energy generated by an impact with the ground. Especially in the case of helicopters such absorption cannot obviously be obtained from seat structures and adequate devices must be built into them for this purpose.
Such devices must be able to reduce the acceleration so caused to levels compatible with the safety of the occupant. For example in civil helicopters the peak of acceleration that has to be suitably "cut" by absorber devices is about 30g.
This "cut" is ensured by seat sliding capacity in accordance with a practically constant stress-stroke.
The integral of the stress-stroke curve represents the quantity of mech- anical energy absorbed.
Presently-known absorbers substantially comprise a mechanical device consisting of two bodies mounted onto the fixed structure of the seat and onto its mobile part respectively. Said mobile part, occupied by the seated person, is suitably armoured and the impact will cause it to slide towards the floor of the aircraft, this movement being slowed down by the absorber of energy. Generally speaking however said absorbers are of some considerable weight and complexity and need frequent maintenance work.
They are also difficult to adapt to varying specific operative conditions. The above disclosure appreciably lessens these drawbacks and offers other advantages as will be described below. Subject of the invention is an absorber of negative mechanical energy generated by impact with the ground, especially designed for seats in aircraft, composed of two groups, one mounted on the fixed structure of the seat and the other on the actual seating part, rendered mobile in relation to the fixed structure. The two groups are joined by a bar which has longitudinal ribs along most of its length, extending to one end, and by a sleeve that houses the bar so that the middle of the sleeeve lies substantially where the ribs begin. The internal shape of said sleeve is substantially complementary to said area of the bar, and cut through it are rectangular holes shaped at their ends like sharp-edged teeth placed at the point where the ribs begin. The end of the bar opposite to the part with the ribs, connects, after passing through the sleeve, with one of the two groups. Said sleeve is connected to the other group.
The material used for the ribs on the bar is a good deal softer than the sharp-edged teeth made at the ends of the rectangular holes in the sleeve.
When an impact occurs, therefore, and the mobile part of the seat suddenly jerks down towards the base of the structural part, the energy produced by acceleration is absorbed by the energy needed by the teeth on the rectangular holes in the sleeve to cut into the ribs on the bar, just like a cutting tool, and remove from each one a shaving that .is expelled through its corresponding hole.
In one advantageous form of execution the sleeve is fixed to the fixed structure of the seat while the bar is fixed to the mobile part of the seat. The bar, sleeve and one of the two groups are connected by two brackets, each respectively fixed to one of the two groups, said brackets being substantially parallel, opposite one another and orthogonal to the direction of movement of the mobile part of the seat. The diameter of a hole, passed through by the bar, in each of the brackets is less than that of a head screwed on at the end of the bar opposite to the ribbed area, and also less than that of the sleeve. Contact between the brackets and the head to the bar and the sleeve, is preferably made by two semi-spherical blocks, of opposing convexity, lodged in the respective complementary seats of annular plates, through which the bar passes, supported by the brackets and making contact with the faces of the brackets turned towards the side of the two groups that move. Said spherical form of the blocks permits compensation of distortion of the fixed and mobile structures of the seat during impact, in relation to alignment of the bar with sleeve, avoiding negative loads of friction. In one preferred execution the bar is cylindrical, its ribs are substantially equal and are set at equal radial distances. Advantageously the bar may be made in a single piece but the ribs on it at least must be of a light alloy or in any case of material suitable for being shaved away for the purpose described above. With the seat in its normal position the bar is fixed to the sleeve by a transversal plug of calibrated shearing strength so that, in the event of an impact, the plug is cut through and the absorber starts operating. Dimensions of the cross section of the ribs on the bar, and at least the material of which they are made, are chosen to comply with the desired absorption of energy according to the different types of use. The invention offers evident advantages. The ratio between absorbed energy and weight is very high. This is an advantage of basic importance in aeronautical applications where weight is obviously decisive.
The whole device is very simple, contains a small number of components and offers considerable resistance to environmental conditions . Practically no maintenance is needed since there are no parts that quickly deteriorate such as fluids or delicate materials.
The structure can therefore last, without any special attention, for the whole life of aeroplane seats, the known figure being not less than 25 years.
Cost is low as components are simple and do not require close working tolerances.
By merely varying dimensions of the teeth that cut away the ribs of light alloy on the bars, the described absorber of energy can be easily adapted to different operative conditions and therefore to the different types of aircraft, in addition - and especially - to helicopters.
Characteristics and purposes of the disclosure will be made still clearer by the following examples of its execution illustrated by diagrammaticaliy drawn figures. Fig. 1 Seat for aircraft with the invented energy absorber in its idle position, seen from behind.
Fig. 2 Absorber of energy in its idle position, perspective view.
Fig. 3 As above, a longitudinal section.
Fig. 4 The seat for aircraft in Fig. 1 , when an impact takes place. Fig. 5 Absorber of energy during an impact, perspective.
Fig. 6 As above, a longitudinal section.
The seat 11 for aircraft comprises a fixed structure 12, fixed to the floor of the aircraft and a mobile structure 13 connected to the absorbers of energy 10, subject of the invention, placed as a pair on either side of the seat.
The absorber of energy 10 comprises two main groups 15 and 45.
Group 15 is mounted on the fixed structure 12 of the seat while group 45 is fixed to the mobile structure 13.
Group 45 comprises a cylindrical aluminium bar 6 with longitudinal ribs 17, and a lower cylindrical part 18, of a diameter substantially the same as that of the bar, between the ribbed part and a lower shank 19.
Said shank 19 is screwed onto a semi-spherical block 34, whose upper surface is convex, and is held firm by two nuts 38, 39. Said block 34 supports the plate 35 in which there is a complementary seat 29 and an axial hole 44 through which the ribbed bar 16 can freely pass.
The discoid plate 35 makes contact against the right-angled bracket 36 fixed to the mobile part 13 of the seat 11 by screws 14.
The group 15 comprises the sleeve 20 into which the bar 16 fits. The internal upper part of said sleeve is substantially complementary to said bar 16 and rectangular holes 21 are cut through it at the position of the ribs 17 on the bar. The lower end of each hole 21 is shaped like a sharp-edged tooth 23 and is placed at the starting point of each rib 17.
The sleeve 20 is supported, in a seat 25 cut for it, by a semi-spherical axial block 30, with downward facing convexity and having a hole 27 the diameter of which is greater than that of the bar 16 between ribs. Said semi-spherical block 30 in turn lies in a complementary seat 26 of a plate 31 with an axial hole 28 in it of a diameter greater than that of the bar 16, supported by a right-angled bracket 33, mounted on the fixed part of the seat 12 by screws 14. Said plate 31 is inserted in the hole 32 in said bracket 33 and its edge 41 makes contact with the edge of said hole 32 in the bracket.
A discoid spacer 37 is placed between the two right-angled brackets 33, 36, there being in said spacer a central hole 42 of a diameter greater than that of the bar 16. The semi-spherical blocks 30, 34 serve to compensate distorsion of the fixed 12 and mobile 13 structures of the seat 11 during an impact and thus keep the bar 16 aligned in relation to the sleeve 20 avoiding creation of undesirable loads of friction.
The sleeve 20 is held firm on the ribbed bar 16 by an elastic transversal plug 24 to maintain adequate seat stability during normal flying. In the event of an impact, as soon as the value that sets off the absorption system is exceeded, the forces acting against the seat cut through the transversal plug 24 and allow the seat to move down towards the floor of the aircraft. This downward movement is however prevented by the teeth 23 on the sleeve 20 that act like a real cutting tool on the ribs 17 of the bar 16, to remove the shavings 40.
Said shavings are expelled through the holes 21 in the sleeve 20. The cutting force needed to shear off the shavings provides the resistance that leads to absorption of energy.
Thickness, position of the ribs and the material of the bar must be suited to the various uses made of the absorber and therefore to the different types of aircraft, especially helicopters.

Claims

1 . Absorber (10) of negative mechanical energy generated by impact with the ground, especially applicable to seats (1 1) in aircraft, composed of two groups, one (15) applied to the fixed structure (12) of the seat and the other (45) to the actual seat, mobile in relation to the fixed structure, characterized in that the two groups (15, 45) are connected by a bar (16) down most of whose length are longitudinal ribs (17) extending right to one end, and of a sleeve (20) that houses the bar and whose centre lies substantially at the point on the bar where the ribs begin, the internal shape of said sleeve being substantially complementare to said area of the bar, there being cut through said sleeve axial rectangular holes (21) whose ends, situated where the ribs begin, are shaped like sharp-edged teeth (23) and are in contact with the bar at the beginning of the ribs, the end (18) of the bar, opposite to the ribbed end, being connected, after passing through the sleeve, to one (45) of the two groups, said sleeve being connected to the other group (15), hardness of at least the material used for the ribs on the bar being much less than that of the sharp- edged teeth placed at the end of the rectangular holes in the sleeve so that, if there is impact with the ground and the mobile part (13) of the seat (11) is forced to make a sudden downward movement towards the base of the fixed structure (12) of the seat, the energy created by acceleration of said movement is absorbed into the energy needed by the teeth in the rectangular holes in the sleeve for their cutting action on the ribs of the bar to remove, as would real cutting tools, a shaving (40) which, as soon as it is formed, is expelled through said rectangular holes.
2. Absorber (10) of energy as in claim 1 , characterized in that the sleeve (20) is made part of the fixed structure
(12) of the seat while the bar (16) is made part of the mobile structure
(13) of the seat.
3. Absorber (10) of energy as in claim 1 , characterized in that connection between the bar (16), the sleeve (20) and, respectively, one of the two groups (15, 45) is made by two brackets (33, 36) respectively fixed to the two groups, said brackets being substantially, parallel, opposite one another and orthogonal to the direction of the mobile part (13) of the seat, there being in said brackets a hole (28, 44) through which the bar passes, diameter of said hole being less than that of a head (38) screwed onto the end (18) of the bar opposite to the ribbed area (17) and less than that of the sleeve.
4. Absorber (10) of energy as in claim 3, characterized in that contact between the brackets (33, 36) and, respectively the head (38) of the bar (16) and the sleeve (20), is made by means of two semi-spherical annular blocks (30, 34), of opposing convexity, fitted into respective complementary seats (26, 29) in annular plates (31 , 35), supported by the brackets, passed through by the bar and making contact with the faces of the brackets (33, 36) turned towards the side of relative movement of the two groups (15, 45), said semi-spherical form of the blocks permitting compensation of distortion of the fixed (12) and mobile (13) structures of the seat (11) during impact, in relation to alignment of the bar with the sleeve, avoiding creation of negative loads of friction.
5. Absorber (10) of energy as in claim 1 , characterized in that the bar (16) is cylindrical.
6. Absorber (10) of energy as in claim 1 , characterized in that the ribs (17) on the bar are placed at equal radial distances.
7. Absorber (10) of energy as in cllaim 1 , characterized in that the ribs (17) on the bar (16) are substantially equal.
8. Absorber (10) of energy as in claim 1 , characterized in that the bar (16) is made in a single piece of material.
9. Absorber (10) of energy as in claim 1 , characterized in that the ribs (17) on the bar (16) are made of a light alloy.
10. Absorber (10) of energy as in claim 1 , characterized in that, in the normal position of the seat (11), the bar (16) is fixed to the sleeve (20) by a transversal plug of calibrated shearing strength so that, if there is impact, the plug is cut through and the absorber (10) comes into operation.
11. Absorber (10) of energy as in claim 1 , characterized in that the dimensions of the cross section of the ribs (17) on the bar (16), and at least the material used to make said ribs, are chosen to comply with the desired values of absorption of energy according to the different uses made of the device.
PCT/IT1997/000099 1996-12-20 1997-05-02 Energy absorbing seat arrangement WO1998028164A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU27873/97A AU2787397A (en) 1996-12-20 1997-05-02 Energy absorbing seat arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI96A002695 1996-12-20
IT96MI002695A IT1289489B1 (en) 1996-12-20 1996-12-20 ABSORBER OF NEGATIVE ENERGY GENERATED BY AN IMPACT WITH THE SOIL, IN PARTICULAR FOR AIRCRAFT SEATS

Publications (1)

Publication Number Publication Date
WO1998028164A1 true WO1998028164A1 (en) 1998-07-02

Family

ID=11375452

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT1997/000099 WO1998028164A1 (en) 1996-12-20 1997-05-02 Energy absorbing seat arrangement

Country Status (3)

Country Link
AU (1) AU2787397A (en)
IT (1) IT1289489B1 (en)
WO (1) WO1998028164A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013030018A2 (en) 2011-08-31 2013-03-07 Valeo Systemes D'essuyage A unit for fixing an automotive wiper device
CN107830108A (en) * 2017-11-23 2018-03-23 航宇救生装备有限公司 A kind of anti-creep rolling-type energy absorber that can be combined with seat mobile jib
CN108995816A (en) * 2018-07-10 2018-12-14 湖北文理学院 A kind of cutting type energy absorption device being integrated in seat mobile jib
CN109109690A (en) * 2018-07-10 2019-01-01 湖北文理学院 A kind of light-duty shock resistance vibration damping and energy-absorbing seat

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779591A (en) * 1971-08-23 1973-12-18 W Rands Energy absorbing device
US4341291A (en) * 1980-05-23 1982-07-27 Exxon Research & Engineering Co. Load control link
US4346795A (en) * 1980-06-23 1982-08-31 Harvey Hubbell Incorporated Energy absorbing assembly
US4523730A (en) * 1981-11-02 1985-06-18 Engineering Patents And Equipment Limited Energy-absorbing seat arrangement
US5234181A (en) * 1991-05-28 1993-08-10 Carl F. Schroth Gmbh Safety belt
US5273240A (en) * 1991-05-02 1993-12-28 Baruch Sharon Impact absorption system, particularly for aircraft seats

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3779591A (en) * 1971-08-23 1973-12-18 W Rands Energy absorbing device
US4341291A (en) * 1980-05-23 1982-07-27 Exxon Research & Engineering Co. Load control link
US4346795A (en) * 1980-06-23 1982-08-31 Harvey Hubbell Incorporated Energy absorbing assembly
US4523730A (en) * 1981-11-02 1985-06-18 Engineering Patents And Equipment Limited Energy-absorbing seat arrangement
US5273240A (en) * 1991-05-02 1993-12-28 Baruch Sharon Impact absorption system, particularly for aircraft seats
US5234181A (en) * 1991-05-28 1993-08-10 Carl F. Schroth Gmbh Safety belt

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013030018A2 (en) 2011-08-31 2013-03-07 Valeo Systemes D'essuyage A unit for fixing an automotive wiper device
CN107830108A (en) * 2017-11-23 2018-03-23 航宇救生装备有限公司 A kind of anti-creep rolling-type energy absorber that can be combined with seat mobile jib
CN107830108B (en) * 2017-11-23 2023-11-21 航宇救生装备有限公司 Creep-resistant rolling energy absorber capable of being combined with main rod of seat
CN108995816A (en) * 2018-07-10 2018-12-14 湖北文理学院 A kind of cutting type energy absorption device being integrated in seat mobile jib
CN109109690A (en) * 2018-07-10 2019-01-01 湖北文理学院 A kind of light-duty shock resistance vibration damping and energy-absorbing seat

Also Published As

Publication number Publication date
AU2787397A (en) 1998-07-17
ITMI962695A1 (en) 1998-06-20
IT1289489B1 (en) 1998-10-15

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