GB2239429A - Inflatable buoyancy members - Google Patents
Inflatable buoyancy members Download PDFInfo
- Publication number
- GB2239429A GB2239429A GB9026259A GB9026259A GB2239429A GB 2239429 A GB2239429 A GB 2239429A GB 9026259 A GB9026259 A GB 9026259A GB 9026259 A GB9026259 A GB 9026259A GB 2239429 A GB2239429 A GB 2239429A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylindrical wall
- wall section
- sheet material
- attachment
- buoyancy
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 claims abstract description 62
- 238000005304 joining Methods 0.000 claims abstract description 15
- 238000005188 flotation Methods 0.000 claims abstract description 7
- 239000013536 elastomeric material Substances 0.000 claims description 21
- 239000012779 reinforcing material Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005253 cladding Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 239000004760 aramid Substances 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 229920001084 poly(chloroprene) Polymers 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT 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
- B64D25/18—Flotation gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B34/00—Vessels specially adapted for water sports or leisure; Body-supporting devices specially adapted for water sports or leisure
- B63B34/50—Body-supporting buoyant devices, e.g. bathing boats or water cycles
- B63B34/565—Accessories, e.g. sticks for water walking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
- B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
- B63B43/10—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy
- B63B43/14—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy using outboard floating members
- B63B2043/145—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy using outboard floating members pneumatic, e.g. inflatable on demand
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Aviation & Aerospace Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
An inflatable buoyancy member 20 for attachment to an aircraft as part of an emergency flotation system or as an inflatable buoyancy collar for attachment to a boat hull has at least one attachment strap 22 formed integrally of the cylindrical wall section 21 of the member. The cylindrical wall section is manufactured from reinforced elastomeric sheet material and attachment straps are provided at desired locations around the circumference of the wall section by folding the sheet material and joining opposed surfaces of the material within the fold by bonding over at least part of the fold. This provides a higher strength attachment because the reinforcing material is continuous through the attachment strap into the wall section as compared to prior art buoyancy members which have attachment straps bonded onto the external surfaces of their wall sections. <IMAGE>
Description
Description of Invention
Title: INFLATABLE BUOYANCY MEMBERS
This invention relates to inflatable buoyancy members and is more particularly concerned with buoyancy members which may be attached to an aircraft such as a helicopter and inflated to allow the aircraft to land on water in an emergency, and with buoyancy members which are inflated and attached to boat hulls as buoyancy collars.
Prior art straps for attachment of inflatable buoyancy members to aircraft and boats have been provided by bonding strips of reinforced elastomeric material onto external surfaces of cylindrical wall sections of such buoyancy members. One such attachment strap is hereinafter described with reference to Figures 2 and 6 of the accompanying drawings. Another attachment strap, disclosed in Figure 8 of US-A-3,154,270 and Figure 4 of US-A-4,165,059, is provided by folding a longitudinally extending strip of material so as to be of
T-shape in transverse cross-section and bonding flanges formed by oppositely projecting arms of the T-shape to the external surface of the cylindrical wall section.
In operation, when inflated, such buoyancy members are subjected to considerable buffeting which imposes high loads on the attachment straps. The strength of the attachment is only as good as the strength of the bonded joint between the strap and the wall section of the buoyancy member so that the bonded joint must have high reliability.
At the same time such bonded joints are susceptible to failure in peel.
In its broadest aspect the present invention provides an inflatable buoyancy member including a substantially cylindrical wall section manufactured from reinforced elastomeric sheet material characterised in that at one or more locations around the circumference of the cylindrical wall section the sheet material is folded and opposed surfaces of the sheet material are joined by bonding over at least part of the fold to form a pleat which is integral with and extends lengthwise of the cylindrical wall section.
The term bonding as used herein encompasses within its scope any suitable means of joining elastomeric material such as, for example, adhesive bonding, or welding.
The cylindrical wall section may be manufactured from one or more sheets of reinforced elastomeric material such as, for example, polychloroprene or polyurethane, reinforced with woven or knitted nylon or high performance aramid fabric, the or each sheet being joined at opposed edges by bonded lap joints which extend lengthwise of the cylindrical wall section.
Alternatively, the cylindrical wall section may be manufactured by coating a woven or knitted sock of suitable diameter with elastomeric material, curing the elastomeric material, making a fold in the elastomeric coated sock at one or more desired circumferential locations and joining opposed surfaces of the folded material by bonding.
If desired the uncured elastomer coated sock may be folded at desired circumferential locations and the folded portions clamped during curing so that the elastomer merges in a homogenous mass with the folded sock material being embedded therein.
The material of the cylindrical wall section may be folded and joined by bonding to provide a pleat which projects outwardly from the circumferential surface of the wall section and extends lengthwise thereof. The projecting pleat may be used as a strap for attachment of the buoyancy member to another object such as the hull of a boat or the fuselage of an aircraft.
Alternatively the material of the cylindrical wall section may be folded back upon itself and then returned back upon itself so as to form a continuum of the circumferential surface of the cylindrical wall section. This provides a triple thickness of material over a local arcuate area of the wall section which may act in place of local cladding for wear protection purposes.
An inflatable buoyancy member in accordance with the present invention has utility as an emergency flotation bag on an aircraft including a helicopter.
Accordingly, in another aspect the present invention provides an inflatable buoyancy member for an aircraft emergency flotation system, the buoyancy member comprising a cylindrical wall section manufactured from reinforced elastomeric sheet material, end closure members manufactured from reinforced elastomeric sheet material bonded one at each end of the cylindrical wall section, and means for attaching the buoyancy member to the aircraft comprising at least one attachment strap extending lengthwise of the cylindrical wall section and projecting outwardly therefrom, characterised in that each strap is formed integrally of the cylindrical wall section by folding the sheet material and joining opposed surfaces of the material within the fold by bonding over at least part of the fold to provide a projecting pleat.
An inflatable buoyancy member also has utility as an inflatable collar adapted for attachment to the hull of a boat, in particular a dinghy.
Accordingly, in a further aspect the present invention provides an inflatable buoyancy collar for attachment to a boat hull comprising a plurality of cylindrical wall sections manufactured from reinforced elastomeric sheet material and joined in end-to-end relationship, and means for attaching the buoyancy collar to the boat hull comprising two straps extending lengthwise of the buoyancy collar and spaced from each other around the circumferential surface of the cylindrical wall sections, characterised in that each strap is formed integrally of the cylindrical wall sections by folding the sheet material and joining opposed surfaces of the material within the fold by bonding over at least part of the fold to form a projecting pleat.
In a particular embodiment of the invention an inflatable buoyancy collar is provided with a third strap formed integrally of the cylindrical wall sections at a desired location on the circumference thereof in like manner to the attachment straps. The third strap may include means for attachment of one or more ropes to the strap.
A buoyancy collar in accordance with a preferred embodiment of the invention has an arcuate length of the circumference of each cylindrical wall section formed of at least three layers of sheet material by folding the sheet material back upon itself, folding the material back upon itself again, and joining opposed surfaces of the material within the folds by bonding over at least part of the folds whereby the folds form a continuum of the circumference of the cylindrical wall section.
The invention will now be further described by way of example and with reference to the accompanying drawings in which:
Figure 1 is a side elevation of an inflatable buoyancy member for an aircraft emergency flotation system;
Figure 2 is a transverse cross-section on line II-II of Figure 1 illustrating construction of an inflatable buoyancy member in accordance with the prior art;
Figure 3 is a similar transverse cross-section to that shown in
Figure 2 illustrating construction of an inflatable buoyancy member modified in accordance with the present invention;
Figure 4 is a foreshortened view in plan of a buoyancy collar for use with a high speed off-shore rescue boat;
Figure 5 is a foreshortened side elevation of the buoyancy collar shown in Figure 5;;
Figure 6 is an enlarged transverse cross-section on line V-V of
Figure 5 illustrating construction detail of a buoyancy collar in accordance with the prior art;
Figure 7 is an enlarged perspective view of detailed construction in Area 'A' of Figure 6; and
Figure 8 is a similar enlarged transverse cross-section to that shown in Figure 6 illustrating construction detail of a buoyancy collar modified in accordance with the present invention.
Referring to Figures 1, 2 and 3 of the drawings, an inflatable buoyancy member 10 suitable for use in an aircraft emergency flotation system (not shown) is manufactured from reinforced elastomeric material such as polychloroprene or polyurethane sheet reinforced with woven nylon or high performance aramid fabric. The buoyancy member 10 comprises a substantially cylindrical wall section 11 having closure members 12 bonded at each end thereof. Two straps 13 and 14 for attachment of the buoyancy member to an aircraft extend lengthwise of the buoyancy member and are spaced from each other around the circumference of the cylindrical wall section and project outwardly from the surface of the wall section.In this example the cylindrical wall section 11 is manufactured from a single sheet of reinforced elastomeric material of appropriate width and length, the lengthwise edges of the sheet being brought together and joined by a bonded lap joint 15. It will be appreciated, however, that depending upon the diameter and hence the circumference of the cylindrical wall section it may be manufactured by joining two or more sheets at opposed edges by bonded lap joints.
In a prior art.buoyancy member shown in transverse cross-section in Figure 2, the straps 13 and 14 are provided by strips of reinforced elastomeric material 16 which extend lengthwise of the buoyancy member.
Each strip 16 is joined along one of its longitudinal edges to the cylindrical wall section 11 at an appropriate circumferential location thereon by substantially Section attachment members 17 and 18 which are suitably bonded to both the strip 16 and the outer surface of the wall section 11. The method of bonding is dependent upon the elastomeric material but may be, for example, adhesive bonding or RF welding. The straps 16 are suitably adapted, such as by the provision of eyelets (not shown) for attachment to an aircraft, for example a helicopter.
This prior art construction requires that a number of material components be produced and joined together by bonding with an additional disadvantage being that the strength of the attachment of the buoyancy member to the aircraft is only as good as the bonded joint between the straps 16 and the cylindrical section 11.
A buoyancy member 20 in accordance with the present invention, as illustrated in transverse cross-section in Figure 3, has a cylindrical wall section 21 and attachment straps 22 formed from a single sheet of reinforced elastomeric material. In manufacture of the buoyancy member 20 a sheet of reinforced elastomeric material is cut to required length and width dimensions. At two locations spaced from each other across the width of the sheet the material is folded lengthwise of the sheet so as to form a pleat of a required dimension 23 and opposed surfaces of the material are joined by bonding over at least part of the dimension 23 whereby the straps 22 are formed integrally of the wall section. The opposed surfaces are thereby brought into face-to-face contact over substantially their entire areas.The lengthwise edges of the sheet are then brought together and joined by a bonded lap joint 24. End closure members (not shown in Figure 3) are joined by bonding to each end of the cylindrical wall section whereby a closed buoyancy member is provided. The buoyancy member is provided with a suitable inflation valve (not shown) and, if required, may be compartmented by a transverse or longitudinal diaphragm (not shown). As for the prior art buoyancy member, the method of bonding is chosen to suit the elastomeric material used in manufacture of the member 20.
Again, it should be appreciated that limitation in the width of reinforcing material presently available from manufacturers of such material, may dictate that where a very large diameter cylindrical wall section is required it be manufactured by joining two or more sheets.
A buoyancy member constructed in accordance with the present invention improves over the prior art buoyancy member by providing straps for attachment of the member to an aircraft which are integral of the cylindrical wall section thereby reducing manufacturing cost and improving strength. Also, there is a saving in weight which is important in aircraft equipment and the buoyancy member of the present invention can be more easily folded in an uninflated condition and packaged in a smaller space envelope compared with the prior art buoyancy member.
Referring now to Figures 4 to 8, in Figures 4 and 5 there is shown an inflated buoyancy collar 40 suitable for attachment to the hull of a boat such as a high speed offshore rescue dinghy. The buoyancy collar 40 comprises a plurality of cylindrical wall sections 41 joined in end-to-end relationship by bonded lap joints 42. Each wall section 41 is manufactured from reinforced elastomeric sheet material such as, for example, polychloroprene reinforced with a woven nylon fabric or polyurethane reinforced with a woven high performance aramid fabric.
If desired transverse diaphragms (not shown) may be provided internally of the wall sections at spaced intervals along the buoyancy collar whereby the collar is divided into a number of separately inflatable compartments.
In a prior art buoyancy collar, shown in transverse cross-section in Figure 6, each cylindrical wall section 41 is manufactured from a single sheet of material having the lengthwise edges thereof joined by a lap joint 43. Straps 44 and 45 for attaching the buoyancy collar to a boat hull are provided by strips 46 of reinforced elastomeric material. Each strip 46 is joined along one of its longitudinal edges to the cylindrical wall section 41 at an appropriate circumferential location thereon by substantially Section attachment members 47 and 48 which are suitably bonded to both the strip 46 and cylindrical wall section 41.
A similar strap 49 is provided at an upper location on the circumference of the cylindrical wall section 41. Again the strap 49 is formed by a strip 46 of reinforced elastomeric material joined to the wall section 41 by substantially Section attachment members.
This strap 49 is adapted by provision of metal eyelets (not shown) for attachment of ropes (not shown) which facilitate handling of the buoyancy collar and a boat to which it is attached.
Around an arcuate portion of that part of the circumference of the cylindrical wall section 41 which faces outwardly away from a boat hull to which the buoyancy collar is attached, a dladding member 50 is attached to protect the collar against damage and wear when the boat comes alongside a jetty or another boat. The cladding member 50 is attached to the cylindrical wall sections 41 by a piano hinge type of attachment best seen in Figure 7. The cladding member 50 is manufactured from reinforced elastomeric sheet material cut to appropriate length and width dimensions. The sheet is folded back on itself and bonded along each lengthwise edge to form a loop for receiving an attachment pin 51. The loop is then cut to provide castellations 52 which intersect with castellations 52 of an attachment member 53 bonded to the wall sections 41.The member 53 is manufactured from a strip of reinforced elastomeric material which is cut and folded to form a loop before being bonded to itself and to the cylindrical section to provide the castellations 52 for reception of the attachment pin 51.
Figure 8 shows a transverse cross-section through a cylindrical wall section 80 of an inflatable buoyancy collar in accordance with the present invention, a plurality of such wall sections 80 being joined in end-to-end relationship to form a buoyancy collar of the shape shown in
Figures 4 and 5. Each cylindrical wall section 80 is manufactured from a single sheet of reinforced elastomeric material cut to appropriate length and width dimensions. Lengthwise edges of the sheet are joined by a bonded lap joint 81 to provide the wall section. Two attachment straps 82 and 83 project outwardly from the surface of the wall section at spaced locations on the circumference thereof.Each strap 82 and 83 is provided integrally of the wall section by folding the sheet material lengthwise around a rope member 84 and joining opposed surfaces of the material by bonding along the fold to form a pleat which projects outwardly with respect to the circumferential surface of the wall section. Thus, after passing round the rope member, the opposed surfaces of the sheet material are brought into face-to-face contact over substantially their entire areas.
A third strap 85 is similarly formed at a location on the circumference of the wall section which is near the top of the collar when it is in use. The third strap is again formed integrally of the wall section by folding the material and joining opposed surfaces by bonding to form an outwardly projecting pleat; however, in the case of the third strap the material is not folded around a rope member. Metal eyelets (not shown) are inserted in the strap 85 for facilitating the attachment of ropes by which the collar and a boat hull to which it is attached may be manhandled.
Along an arcuate length of the circumference of the cylindrical wall sections 80 which is outward facing when the buoyancy collar is attached to a boat hull, the sheet material is folded back upon itself over a first fold line 86 and then returned upon itself over a second fold line 87 to provide a triple thickness of material which is a continuum of the circumference of the wall sections. Opposed surfaces of the material are joined by bonding at outermost end portions of the folds but in this embodiment the opposed material surfaces are not joined along the centre length of folds.
A capping strip 88 of similar reinforced elastomeric material is bonded along the length of the cylindrical section so as to cover the exposed end of the first fold line 86. The capping strip 88 substantially relieves peel loads which would otherwise act on the bond between the opposed material surfaces at the exposed end of the first fold line 86 and ensures that this bond is substantially in shear.
The area of triple thickness material replaces the cladding member 50 of the prior art construction and, in use of the collar, when wear occurs a hole will first appear in the outermost layer of material.
When this hole is seen a local repair can be made by bonding a patch of material in place to cover the hole and surrounding worn area.
A buoyancy collar constructed in accordance with the present invention has a number of advantages over the prior art flotation collar. It has higher strength because the straps are formed integrally with the collar. Also, it requires fewer components be assembled together in manufacture of the collar thereby reducing weight and manufacturing time which in turn reduces manufacturing costs.
In a non-illustrated embodiment a cylindrical wall section for a buoyancy member or a buoyancy collar having one or more straps formed integrally of the wall section, is manufactured by coating a woven or knitted sock of suitable diameter with elastomeric material. The reinforcing sock may be first coated with elastomeric material which is cured before the wall section is folded at desired circumferential locations and opposed surfaces of the material in the fold are joined by bonding. Alternatively, the sock coated with uncured elastomeric material may be folded at desired locations and the folded portions clamped during curing so that the elastomer merges in a homogenous mass with the reinforcing sock embedded therein.
Claims (13)
1. An inflatable buoyancy member including a substantially cylindrical wall section manufactured from reinforced elastomeric sheet material, characterised in that at one or more locations around the circumference of the cylindrical wall section the sheet material is folded and opposed surfaces of the sheet material are joined by bonding over at least a part of the fold to form a pleat which is integral of and extends lengthwise of the cylindrical wall section.
2. An inflatable buoyancy member as claimed in Claim 1, further characterised in that the pleat projects outwardly of the surface of the cylindrical wall section to provide an attachment strap.
3. An inflatable buoyancy member as claimed in Claim 1, further characterised in that the pleat is folded and bonded back upon the circumferential surface of the cylindrical wall section thereby providing multiple thickness of material over a local arcuate area of the cylindrical wall section.
4. An inflatable buoyancy member as claimed in any preceding claim, further characterised in that the cylindrical wall section is manufactured by joining one or more sheets of reinforced flexible sheet material at opposed edges by bonded lap joints which extend along the lengthwise of the cylindrical wall section.
5. An inflatable buoyancy member as claimed in any one of Claims 1 to 3, further characterised in that the cylindrical wall section is manufactured from a woven or knitted sock coated with elastomeric material.
6. An inflatable buoyancy member for an aircraft emergency flotation system, the buoyancy member comprising a cylindrical wall section manufactured from reinforced elastomeric sheet material, end closure wall members manufactured from reinforced elastomeric sheet material bonded one at each end of the cylindrical wall section, and means for attaching the buoyancy member to the aircraft comprising at least one attachment strap extending lengthwise of the cylindrical wall section and projecting outwardly therefrom, characterised in that each strap is formed integrally of the cylindrical wall section by folding the sheet material and joining opposed surfaces of the material within the fold by bonding over at least a part of the fold to provide a projecting pleat.
7. An inflatable buoyancy collar for attachment to a boat hull comprising a plurality of cylindrical wall sections manufactured from reinforced elastomeric sheet material and joined in end-to-end relationship, and means for attaching the buoyancy collar to the boat hull comprising two straps extending lengthwise of the buoyancy collar and spaced from each other around the circumferential surface of the cylindrical wall sections, characterised in that each strap is formed integrally of the cylindrical wall sections by folding the sheet material and joining opposed surfaces of the material within the fold by bonding over at least part of the fold to form a projecting pleat.
8. An inflatable buoyancy collar as claimed in Claim 7, further characterised in that a third strap is formed integrally of the cylindrical wall sections at a desired location on the circumference thereof by folding the sheet material and joining opposed surfaces of the material within the fold by bonding over at least part of the fold.
9. An inflatable buoyancy collar as claimed in Claim 8, further characterised in that the third strap includes means for attachment of one or more ropes to the strap.
10. An inflatable buoyancy collar as claimed in any one of Claims 7, 8 or 9, further characterised in that an arcuate length of the circumference of each cylindrical wall section is formed of at least three layers of sheet material by folding the sheet material back upon itself, folding the material back upon itself again, and joining opposed surfaces of the material within the folds by bonding over at least part of the folds.
11. A buoyancy member substantially as hereinbefore described with reference to and as shown in Figures 1 and 3 of the accompanying drawings.
12. A buoyancy collar substantially as hereinbefore described with reference to and as shown in Figures 4, 5 and 8 of the accompanying drawings.
13. Any new or improved features, combinations and arrangements described, shown and mentioned or any of them together or separately.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB898927595A GB8927595D0 (en) | 1989-12-06 | 1989-12-06 | Inflatable buoyancy members |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9026259D0 GB9026259D0 (en) | 1991-01-16 |
| GB2239429A true GB2239429A (en) | 1991-07-03 |
Family
ID=10667519
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB898927595A Pending GB8927595D0 (en) | 1989-12-06 | 1989-12-06 | Inflatable buoyancy members |
| GB9026259A Withdrawn GB2239429A (en) | 1989-12-06 | 1990-12-03 | Inflatable buoyancy members |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB898927595A Pending GB8927595D0 (en) | 1989-12-06 | 1989-12-06 | Inflatable buoyancy members |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8927595D0 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5651328A (en) * | 1996-02-13 | 1997-07-29 | Elkington; John Richard | Open boat hull structures |
| FR3082826A1 (en) * | 2018-06-26 | 2019-12-27 | Airbus Helicopters | FIXING INTERFACE, FLOAT SYSTEM AND VEHICLE |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1505511A (en) * | 1974-05-17 | 1978-03-30 | France Armed Forces | Inflatable device for use with a body intended to float |
-
1989
- 1989-12-06 GB GB898927595A patent/GB8927595D0/en active Pending
-
1990
- 1990-12-03 GB GB9026259A patent/GB2239429A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1505511A (en) * | 1974-05-17 | 1978-03-30 | France Armed Forces | Inflatable device for use with a body intended to float |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5651328A (en) * | 1996-02-13 | 1997-07-29 | Elkington; John Richard | Open boat hull structures |
| FR3082826A1 (en) * | 2018-06-26 | 2019-12-27 | Airbus Helicopters | FIXING INTERFACE, FLOAT SYSTEM AND VEHICLE |
| EP3587271A1 (en) | 2018-06-26 | 2020-01-01 | Airbus Helicopters | Flotation system provided with an attachment interface and associated vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9026259D0 (en) | 1991-01-16 |
| GB8927595D0 (en) | 1990-02-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |