EP0145148A2 - Flotation bag assembly - Google Patents
Flotation bag assembly Download PDFInfo
- Publication number
- EP0145148A2 EP0145148A2 EP19840306473 EP84306473A EP0145148A2 EP 0145148 A2 EP0145148 A2 EP 0145148A2 EP 19840306473 EP19840306473 EP 19840306473 EP 84306473 A EP84306473 A EP 84306473A EP 0145148 A2 EP0145148 A2 EP 0145148A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- payload
- buoyant member
- bag
- fluid medium
- antenna
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B22/00—Buoys
- B63B22/18—Buoys having means to control attitude or position, e.g. reaction surfaces or tether
Definitions
- This invention relates generally to a stable support for structures at or above the surface of a fluid medium and in particular to a communications buoy for use in the ocean.
- Damper plates and toroid shaped flotation devices have been used to create buoys which are wave followers. For example, see Buoy Engineering, H.O. Berteaux, John and Sons, 1976 Pg. 212-213. These surface following buoys are subject to strong heave and pitch due to the motion of the ocean.
- a more stable buoy can be built by decreasing the cross section of the buoy at the water level. Such devices experience less heave.
- the mass of the buoy can also be distributed to create a righting moment. This will decrease the pitch.
- buoyant cylinder with a counterweight suspended from its bottom is a typical example, Berteaux, supra.
- Such spar buoys cannot have much reserve buoyancy and usually have a large draft. These factors mitigate the usefulness of these types of buoys in deep water.
- the buoy according to the invention may be used as part of a search and rescue system for locating downed aircraft and ships in distress. Such buoys would be carried by vehicles and be deployed when needed. Their distress signal could be received by satellites and their position located.
- the bouy according to the invention could carry various other types of payloads or support various antenna structures as well.
- Other possible uses include oceanographic monitoring buoys and satellite linked sonobuoys.
- the invention is an apparatus for the stable support of a structure, such as an antenna, in a fluid medium, such as water.
- the apparatus comprises a bouyant first member and first means for engaging the structure.
- the first means is associated with the member.
- Second means are provided for channeling the fluid which encroaches upon the bouyant member due to any motion of the member with respect to the surface of the fluid medium, the encroaching fluid being channeled back into the fluid medium such that the kinetic energy of the bouyant first member is dissipated as the fluid is channeled back into the fluid medium.
- the apparatus according to the invention may comprise a bouyant first member for supporting the structure, a payload and decoupling means for supporting the payload below the bouyant member such that any motion of the payload is decoupled from the member and any motion of the member is decoupled from the payload.
- the apparatus according to the invention may comprise a bouyant member with an inwardly arched bottom portion, and means, associated with the bouyant member, for engaging the structure.
- an apparatus may comprise an antenna, a bouyant member, first means for generating an r.f. signal, second means interconnecting the first means and the antenna, and decoupling means for supporting the first means below the bouyant member such that any motion of the member is decoupled from the first means and the motion of the first means is decoupled from the member.
- the invention may comprise a communications bouys which is stable in a fluid medium and includes structures for minimizing the heave and pitch of the bouy.
- a flotation bag with a concave bottom formed by pulling in the center of the bottom of the bag with straps secured to the inside walls of the bag supports an antenna.
- a semi-rigid damper skirt extending around the base of the bag is submerged when the apparatus is floating in the fluid medium.
- the bag is provided with a ribbon fence comprising containers which have an opening above the fluid level, and an opening below the fluid level, when the apparatus is floating in the medium, allowing the fluid to flow in and out of the containers.
- the payload is supported in a cylindrical chamber connected to the flotation bag by a flexible cable, enabling the payload to swing.
- flotation bag 1 is an inflated balloon-like structure having a specific gravity less than the specific gravity of fluid medium W. Bag 1 encloses antenna 2 and supports a payload 3 below the surface of medium W.
- this embodiment comprises flotation bag 1 which encloses antenna 2, the invention includes flotation devices of any type which support structures.
- Figures 5a-5g compare the estimated performance 102 of an antenna such as antenna 3 under varying conditions of heave and pitch with the operational performance requirement 101 for successful transmission.
- Antenna 3 uses the surface of the fluid W as a ground plane. Heave and pitch disturb the relationship between the radiating antenna 3 and the ground plane, changing the radiation pattern of antenna 3.
- graphs 5a, 5b, and 5f the estimated performance 102 of antenna 3 crosses and falls below the operational performance requirements for successful transmission between certain points on the graphs.
- successful transmission is not achieved when antenna 3 undergoes more than 4 ins (10 cms) heave or 25° pitch.
- the apparatus according to the invention limits the motion of the antenna relative to the ground plane to within 10 cms. heave and 250 pitch, under ocean conditions up to sea state 5.
- a damper skirt 4 extends around the base of the flotation bag 1 and is made of a semi-rigid material supported in a horizontal position by ribbon fence 5.
- damper skirt 4 When the apparatus is afloat, damper skirt 4 is below the surface of the medium W.
- the weight of the payload 3, the shape of the bottom of the flotation bag 1 and the bouyancy of bag 1, which will be described in detail below, are configured so that damper skirt 4 is below the water line when the apparatus is stable.
- Damper skirt 4 increases the surface area in contact with the ocean, offering a surface which resists motion V within medium W.
- damper skirt 4 In order to rise or tip in response to a wave, damper skirt 4 must travel upwardly through the fluid. The resistance to upward movement of skirt 4 is caused by the fluid above the skirt 4. The energy that would otherwise cause heave and pitch of the flotation bag 1 is dissipated by this resistance and any resulting movement of skirt 4 within the medium W.
- ribbon fence 5 which supports the damper skirt 4 is a series of contiguous compartments, 5a-5g.
- Damper skirt 4 acts as the base of the compartments-5a-5g of ribbon fence 5 and the side ls of the flotation bag 1 forms the back wall of the compartments.
- the walls of the compartments in the embodiment illustrated comprise a strip of semi-rigid material connected to the side of the flotation bag 1 at spaced apart points P.
- the flotation bag 1, damper skirt 4 and the strip form the contiguous compartments, the combination of which is referred to herein as ribbon fence 5.
- Each compartment 5a-5g has an opening 6 in the lower portion thereof, where the strip joins to damper skirt 4.
- the compartments have an opened top 7.
- the bottom hole 6, which has a cross section less than the opening at the top 7, is beneath the level of the medium W.
- the water line on the flotation bag when the apparatus is at rest in the ocean is approximately at the midpoint 8 of the height of the ribbon fence 5.
- Compartments 5a-5h act as containers for the fluid medium. Fluid encroaching upon bag 1 can enter the compartments through hole 6 or the opened top 7 and can drain from the compartments through the hole 6. When bag 1 rises due to the motion of the ocean, sea water will drain out of the holes 6, dissipating the kinetic energy of bag 1 created by the - rising motion of the ocean. Oscillating of the flotation bag 1 within the medium W are thereby damped.
- the compartments increase the resistance to motion of damper skirt 4 by partially enclosing the fluid and by requiring the damper skirt to lift the partially enclosed fluid in the compartments as the flotation bag 1 rises in response to a wave. This acts to further decrease the heave and pitch of the flotation bag.
- damper skirt 4 and ribbon fence 5 are described associated with each other, constructed from semi-rigid materials for the purpose of stabilizing flotation bag 1.
- the damper skirt 4 may be a submerged plate and the means for channeling fluid that encroaches on the device.
- Such structures may be used separately or in combination to decrease both the heave and pitch of the device.
- Payload 3 comprises electronics 31 enclosed in a cylindrical housing 32.
- Housing 32 is connected to the bottom of the flotation bag 1 by nylon cord 8.
- One end of nylon cord 8 connects to a point 8a within the housing, approximately one-quarter from the top of the housing and the other end connects to the center of the bottom of the bag 8b, at bulkhead 9, which is a rigid portion.
- Electrical wires 311 also pass from the electronics 31 into the bulkhead 9. Beneath the bulkhead 9 is microphonics bumper 91.
- the range of motion depends on the demensions of the decoupling apparatus including the diameter of housing 32 and the distance between the top of housing 32 and microphonic bumper 91.
- Housing 32 is free to swing like a pendulum until the top of the housing 32a collides with the microphonic bumper 91. Similarly, the flotation bag 1 can freely pitch until the bumper 91 collides with the top of the housing 32a.
- Bumper 91 absorbs some of the energy of any impact between bag 1 and payload 3, decreasing the effect such impact would have on the heave and pitch of the flotation bag. Bumper 91 also protects the electrical wiring that feed to the antenna, preventing interruption or interference with the transmission of a message due to impacts between the housing 32a and the bulkhead 9 through which wires 311 pass.
- electronics 31 is close to antenna 2 in order to minimize the power loss due to transmission of a signal from electronics 31 to antenna 2 via cable 311.
- the power loss is less than 3db.
- the center of the bottom of the flotation bag 1 is pulled upward by straps 13 secured at 131, along the inside wall of flotation bag 1. This reduces the buoyancy of bag 1, aiding in maintaining the necessary waterline above damper skirt 4 and at the midpoint of ribbon fence 5.
- the base of bag 16 is inwardly arched at its center 15 so that the greatest bouyant forces are located at the outer portions of the bag 16. This decreases the pitch of the flotation bag 1 by creating a longer torque arm which must be overcome for the flotation bag to rotate. This righting moment further aids in stabilizing the flotation bag.
- the adhesion caused by inwardly arched center 15 between the surface of the bottom 16 of the bag and the fluid medium W also decreases the heave of the flotation bag.
- this particular embodiment describes a flotation bag with a concave bottom
- the invention is meant to cover flotation devices of any material with a bottom of inwardly arched shape.
- the apparatus and payload are ejected in the cylindrical housing 3, as shown in Figure 3.
- Antenna 4, flotation bag 1, ribbon fence 5 and damper skirt 4 are all stored in upper chamber 33 of the housing 32.
- Housing 32 which is bouyant, floats to the surface of the ocean after being ejected.
- the flotation bag and antenna are then deployed and the preprogrammed messages are transmitted.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Hydrogenated Pyridines (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
- The Government has rights in this invention pursuant to Contract N00039-83-C-0191 awarded by the Department of the Navy, United States of America.
- This invention relates generally to a stable support for structures at or above the surface of a fluid medium and in particular to a communications buoy for use in the ocean.
- Many types of flotation devices exist with differing characterisitcs.
- Damper plates and toroid shaped flotation devices have been used to create buoys which are wave followers. For example, see Buoy Engineering, H.O. Berteaux, John and Sons, 1976 Pg. 212-213. These surface following buoys are subject to strong heave and pitch due to the motion of the ocean.
- A more stable buoy can be built by decreasing the cross section of the buoy at the water level. Such devices experience less heave. The mass of the buoy can also be distributed to create a righting moment. This will decrease the pitch.
- Further stability can be obtained by surface decouplino. A buoyant cylinder with a counterweight suspended from its bottom is a typical example, Berteaux, supra. Such spar buoys cannot have much reserve buoyancy and usually have a large draft. These factors mitigate the usefulness of these types of buoys in deep water.
- It is an object of this invention to provide a communications buoy having an antenna which uses the surface of the ocean as a ground plane; such buoy having structure which limits the antenna's motion with respect to the surface of the ocean to within 4 in (10 cm.) heave and 250 pitch.
- It is another object of this invention to provide a stable buoy that can withstand ocean conditions up to and including
state 5. - The buoy according to the invention may be used as part of a search and rescue system for locating downed aircraft and ships in distress. Such buoys would be carried by vehicles and be deployed when needed. Their distress signal could be received by satellites and their position located.
- The bouy according to the invention could carry various other types of payloads or support various antenna structures as well. Other possible uses include oceanographic monitoring buoys and satellite linked sonobuoys.
- It is an object of this invention to provide an apparatus for the stable support of a structure, such as an antenna, in a fluid medium, such as water.
- It is a futher object of this invention to limit the motion of an antenna supported above the surface of the ocean, within the operational limits of the transmitting system.
- It is a further object of this invention to support an electronics payload near the surface of the ocean such that the power loss between the electronics payload and an antenna supported on the surface is within operational limits and, specifically, less than 3db.
- The invention is an apparatus for the stable support of a structure, such as an antenna, in a fluid medium, such as water. The apparatus comprises a bouyant first member and first means for engaging the structure. The first means is associated with the member. Second means are provided for channeling the fluid which encroaches upon the bouyant member due to any motion of the member with respect to the surface of the fluid medium, the encroaching fluid being channeled back into the fluid medium such that the kinetic energy of the bouyant first member is dissipated as the fluid is channeled back into the fluid medium.
- Alternatively, the apparatus according to the invention may comprise a bouyant first member for supporting the structure, a payload and decoupling means for supporting the payload below the bouyant member such that any motion of the payload is decoupled from the member and any motion of the member is decoupled from the payload.
- Alternatively, the apparatus according to the invention may comprise a bouyant member with an inwardly arched bottom portion, and means, associated with the bouyant member, for engaging the structure.
- Alternatively, an apparatus according to the invention may comprise an antenna, a bouyant member, first means for generating an r.f. signal, second means interconnecting the first means and the antenna, and decoupling means for supporting the first means below the bouyant member such that any motion of the member is decoupled from the first means and the motion of the first means is decoupled from the member.
- Alternatively, the invention may comprise a communications bouys which is stable in a fluid medium and includes structures for minimizing the heave and pitch of the bouy. Specifically, a flotation bag with a concave bottom formed by pulling in the center of the bottom of the bag with straps secured to the inside walls of the bag supports an antenna. A semi-rigid damper skirt extending around the base of the bag is submerged when the apparatus is floating in the fluid medium. The bag is provided with a ribbon fence comprising containers which have an opening above the fluid level, and an opening below the fluid level, when the apparatus is floating in the medium, allowing the fluid to flow in and out of the containers. The payload is supported in a cylindrical chamber connected to the flotation bag by a flexible cable, enabling the payload to swing.
- Figure 1 is a side view of a communications bouy according to the invention deployed in water.
- Figure 2 is a side view of the bouy of Figure 1 with parts broken away to illustrate internal structure.
- Figure 3 is a perspective view of a communications bouy according to the invention in an undeployed state.
- Figure 4 is a top view of a flotation bag according to the invention.
- Figures 5a -5g are graphs illustrating the operational transmission requirements and the estimated performance of an antenna system according to the invention under varying conditions of heave and pitch.
- Referring to figures 1 and 2,
flotation bag 1 is an inflated balloon-like structure having a specific gravity less than the specific gravity of fluidmedium W. Bag 1 enclosesantenna 2 and supports apayload 3 below the surface of medium W. - Although this embodiment comprises
flotation bag 1 which enclosesantenna 2, the invention includes flotation devices of any type which support structures. - Figures 5a-5g compare the estimated
performance 102 of an antenna such asantenna 3 under varying conditions of heave and pitch with theoperational performance requirement 101 for successful transmission.Antenna 3 uses the surface of the fluid W as a ground plane. Heave and pitch disturb the relationship between the radiatingantenna 3 and the ground plane, changing the radiation pattern ofantenna 3. As shown bygraphs performance 102 ofantenna 3 crosses and falls below the operational performance requirements for successful transmission between certain points on the graphs. In summary, successful transmission is not achieved whenantenna 3 undergoes more than 4 ins (10 cms) heave or 25° pitch. The apparatus according to the invention limits the motion of the antenna relative to the ground plane to within 10 cms. heave and 250 pitch, under ocean conditions up tosea state 5. - A
damper skirt 4 extends around the base of theflotation bag 1 and is made of a semi-rigid material supported in a horizontal position byribbon fence 5. - When the apparatus is afloat,
damper skirt 4 is below the surface of the medium W. The weight of thepayload 3, the shape of the bottom of theflotation bag 1 and the bouyancy ofbag 1, which will be described in detail below, are configured so thatdamper skirt 4 is below the water line when the apparatus is stable. -
Damper skirt 4 increases the surface area in contact with the ocean, offering a surface which resists motion V within medium W. In order to rise or tip in response to a wave,damper skirt 4 must travel upwardly through the fluid. The resistance to upward movement ofskirt 4 is caused by the fluid above theskirt 4. The energy that would otherwise cause heave and pitch of theflotation bag 1 is dissipated by this resistance and any resulting movement ofskirt 4 within the medium W. - As shown particularly in figure 4,
ribbon fence 5 which supports thedamper skirt 4 is a series of contiguous compartments, 5a-5g.Damper skirt 4 acts as the base of the compartments-5a-5g ofribbon fence 5 and the side ls of theflotation bag 1 forms the back wall of the compartments. The walls of the compartments in the embodiment illustrated comprise a strip of semi-rigid material connected to the side of theflotation bag 1 at spaced apart points P. Theflotation bag 1,damper skirt 4 and the strip form the contiguous compartments, the combination of which is referred to herein asribbon fence 5. - Each
compartment 5a-5g has anopening 6 in the lower portion thereof, where the strip joins todamper skirt 4. The compartments have an openedtop 7. When stable in the ocean, thebottom hole 6, which has a cross section less than the opening at thetop 7, is beneath the level of the medium W. The water line on the flotation bag when the apparatus is at rest in the ocean is approximately at themidpoint 8 of the height of theribbon fence 5. -
Compartments 5a-5h act as containers for the fluid medium. Fluid encroaching uponbag 1 can enter the compartments throughhole 6 or the opened top 7 and can drain from the compartments through thehole 6. Whenbag 1 rises due to the motion of the ocean, sea water will drain out of theholes 6, dissipating the kinetic energy ofbag 1 created by the - rising motion of the ocean. Oscillating of theflotation bag 1 within the medium W are thereby damped. The compartments increase the resistance to motion ofdamper skirt 4 by partially enclosing the fluid and by requiring the damper skirt to lift the partially enclosed fluid in the compartments as theflotation bag 1 rises in response to a wave. This acts to further decrease the heave and pitch of the flotation bag. - The
damper skirt 4 andribbon fence 5 are described associated with each other, constructed from semi-rigid materials for the purpose of stabilizingflotation bag 1. However, thedamper skirt 4 may be a submerged plate and the means for channeling fluid that encroaches on the device. Such structures may be used separately or in combination to decrease both the heave and pitch of the device. -
Payload 3 compriseselectronics 31 enclosed in acylindrical housing 32.Housing 32 is connected to the bottom of theflotation bag 1 bynylon cord 8. One end ofnylon cord 8 connects to a point 8a within the housing, approximately one-quarter from the top of the housing and the other end connects to the center of the bottom of thebag 8b, atbulkhead 9, which is a rigid portion.Electrical wires 311 also pass from theelectronics 31 into thebulkhead 9. Beneath thebulkhead 9 is microphonicsbumper 91. -
Nylon cord 8 and the location of the connection between thehousing 32 and theflotation bag 1, at 8a and 8b, decouple the motion offlotation bag 1 fromhousing 32 such that, over a certain range, the motion ofbag 1 does not affect the motion ofcylindrical housing 32 and the motion ofcylindrical housing 32 does not affect the housing motion ofbag 1. The range of motion depends on the demensions of the decoupling apparatus including the diameter ofhousing 32 and the distance between the top ofhousing 32 andmicrophonic bumper 91. -
Housing 32 is free to swing like a pendulum until the top of thehousing 32a collides with themicrophonic bumper 91. Similarly, theflotation bag 1 can freely pitch until thebumper 91 collides with the top of thehousing 32a. - This allows for 100 - 15 0 of motion of the
payload 3, measured from the vertical, before contact betweenhousing 32a andmicrophonic bumper 91.Bumper 91 absorbs some of the energy of any impact betweenbag 1 andpayload 3, decreasing the effect such impact would have on the heave and pitch of the flotation bag.Bumper 91 also protects the electrical wiring that feed to the antenna, preventing interruption or interference with the transmission of a message due to impacts between thehousing 32a and thebulkhead 9 through whichwires 311 pass. - In the embodiment illustrated,
electronics 31 is close toantenna 2 in order to minimize the power loss due to transmission of a signal fromelectronics 31 toantenna 2 viacable 311. Preferably, the power loss is less than 3db. - The
upper portion 33, ofhousing 32, referred to herein as a collar, stores the entire flotation apparatus before it is deployed, as shown in Figure 3. After deployment, theupper portion 33 floods with water, throughholes 14 in its sides, as shown in Figures 1 and 2. The flooding reduces the buoyancy of thepayload 3 which results inpayload 3 pulling theflotation bag 1 into the water, ensuring that thedamper skirt 4 andbottom hole 6 ofribbon fence 5 are submerged. This increases the stability offlotation bag 1. - The flooding of
upper portion 33 results in the center of mass ofhousing 32 being lower in the medium W, increasing the period of oscillation ofhousing 32. This stabilizes the entire structure and decreases the heave and pitch offlotation bag 1. - The center of the bottom of the
flotation bag 1 is pulled upward bystraps 13 secured at 131, along the inside wall offlotation bag 1. This reduces the buoyancy ofbag 1, aiding in maintaining the necessary waterline abovedamper skirt 4 and at the midpoint ofribbon fence 5. The base ofbag 16 is inwardly arched at itscenter 15 so that the greatest bouyant forces are located at the outer portions of thebag 16. This decreases the pitch of theflotation bag 1 by creating a longer torque arm which must be overcome for the flotation bag to rotate. This righting moment further aids in stabilizing the flotation bag. The adhesion caused by inwardlyarched center 15 between the surface of the bottom 16 of the bag and the fluid medium W also decreases the heave of the flotation bag. - Although this particular embodiment describes a flotation bag with a concave bottom, the invention is meant to cover flotation devices of any material with a bottom of inwardly arched shape.
- The apparatus and payload are ejected in the
cylindrical housing 3, as shown in Figure 3.Antenna 4,flotation bag 1,ribbon fence 5 anddamper skirt 4 are all stored inupper chamber 33 of thehousing 32.Housing 32, which is bouyant, floats to the surface of the ocean after being ejected. The flotation bag and antenna are then deployed and the preprogrammed messages are transmitted.
Claims (12)
characterised by:
characterised in that:
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US56176583A | 1983-12-15 | 1983-12-15 | |
US561765 | 1983-12-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0145148A2 true EP0145148A2 (en) | 1985-06-19 |
EP0145148A3 EP0145148A3 (en) | 1988-10-19 |
EP0145148B1 EP0145148B1 (en) | 1992-03-11 |
Family
ID=24243359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84306473A Expired - Lifetime EP0145148B1 (en) | 1983-12-15 | 1984-09-21 | Flotation bag assembly |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0145148B1 (en) |
JP (1) | JPH0645355B2 (en) |
AU (1) | AU565744B2 (en) |
CA (1) | CA1219363A (en) |
NO (1) | NO167192C (en) |
NZ (1) | NZ209269A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2917755A (en) * | 1957-10-01 | 1959-12-22 | Peck Ralph | Floating lantern support |
GB1170547A (en) * | 1966-04-25 | 1969-11-12 | Sparton Corp | A Flotation System including a Compliant Suspension System for a Submersible Body |
US3500209A (en) * | 1964-11-27 | 1970-03-10 | Gordon William Fletcher | Stabilized radio rescue beacon |
FR2404413A1 (en) * | 1977-09-28 | 1979-04-27 | Seban Norbert | Inflatable mattresses etc. with internal and external ties - for modular assembly of pneumatic panels of controlled depth |
US4383831A (en) * | 1978-09-05 | 1983-05-17 | Raytheon Company | Stabilized suspension system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS445130Y1 (en) * | 1965-12-30 | 1969-02-25 | ||
JPS59863Y2 (en) * | 1978-08-31 | 1984-01-11 | 沖電気工業株式会社 | underwater anchor |
-
1984
- 1984-08-10 AU AU31823/84A patent/AU565744B2/en not_active Ceased
- 1984-08-17 NZ NZ209269A patent/NZ209269A/en unknown
- 1984-08-30 NO NO843450A patent/NO167192C/en unknown
- 1984-08-31 CA CA000462265A patent/CA1219363A/en not_active Expired
- 1984-09-21 EP EP84306473A patent/EP0145148B1/en not_active Expired - Lifetime
- 1984-11-08 JP JP59235944A patent/JPH0645355B2/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2917755A (en) * | 1957-10-01 | 1959-12-22 | Peck Ralph | Floating lantern support |
US3500209A (en) * | 1964-11-27 | 1970-03-10 | Gordon William Fletcher | Stabilized radio rescue beacon |
GB1170547A (en) * | 1966-04-25 | 1969-11-12 | Sparton Corp | A Flotation System including a Compliant Suspension System for a Submersible Body |
FR2404413A1 (en) * | 1977-09-28 | 1979-04-27 | Seban Norbert | Inflatable mattresses etc. with internal and external ties - for modular assembly of pneumatic panels of controlled depth |
US4383831A (en) * | 1978-09-05 | 1983-05-17 | Raytheon Company | Stabilized suspension system |
Also Published As
Publication number | Publication date |
---|---|
EP0145148A3 (en) | 1988-10-19 |
NO167192C (en) | 1991-10-16 |
NO843450L (en) | 1985-06-17 |
EP0145148B1 (en) | 1992-03-11 |
CA1219363A (en) | 1987-03-17 |
AU3182384A (en) | 1985-06-20 |
AU565744B2 (en) | 1987-09-24 |
JPH0645355B2 (en) | 1994-06-15 |
NZ209269A (en) | 1987-06-30 |
JPS60177278A (en) | 1985-09-11 |
NO167192B (en) | 1991-07-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5066256A (en) | Buoy and releasing system for ships in distress | |
US4675686A (en) | Flotation bag assembly | |
US20180091236A1 (en) | Systems and methods for transmitting data from an underwater station | |
US7900571B2 (en) | Buoy | |
US3191202A (en) | Minimum motion moored buoy system | |
US4004265A (en) | Self-propelled array system | |
US4138752A (en) | Marine buoy | |
JP5923169B2 (en) | Communication buoy and deployment method | |
US10322782B1 (en) | Combined autonomous underwater vehicle and buoy device | |
US3828380A (en) | Fixed freeboard spar buoy | |
EP3009341A1 (en) | Underwater mobile body | |
US4186370A (en) | Stabilized sonobuoy suspension | |
US3090976A (en) | Flexible deep sea buoy | |
US4281427A (en) | Warning and signalling device, especially for maritime purposes | |
US3369516A (en) | Stable oceanic station | |
US6814638B2 (en) | Airdrop type buoy apparatus | |
US3543228A (en) | Sonobuoy suspension system | |
EP0145148B1 (en) | Flotation bag assembly | |
GB2316173A (en) | Sonar suspension system | |
US4527503A (en) | Spar buoy escape system for offshore platforms | |
US5116268A (en) | Buoy flotation gimbal | |
US4383831A (en) | Stabilized suspension system | |
US3453670A (en) | Marine buoy | |
US5596943A (en) | Apparatus and method for floating a towed device from a submerged vehicle | |
US3906565A (en) | Drifting ocean buoy |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): FR GB Kind code of ref document: A2 Designated state(s): FR GB |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): FR GB |
|
17P | Request for examination filed |
Effective date: 19890411 |
|
17Q | First examination report despatched |
Effective date: 19901107 |
|
RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HAZELTINE CORPORATION |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): FR GB |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19950619 Year of fee payment: 12 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19950623 Year of fee payment: 12 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19960921 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19960930 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19960921 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |