GB2597504A - Shaft contact device - Google Patents

Shaft contact device Download PDF

Info

Publication number
GB2597504A
GB2597504A GB2011487.2A GB202011487A GB2597504A GB 2597504 A GB2597504 A GB 2597504A GB 202011487 A GB202011487 A GB 202011487A GB 2597504 A GB2597504 A GB 2597504A
Authority
GB
United Kingdom
Prior art keywords
shaft
bracket
spaced
arms
head
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
Application number
GB2011487.2A
Other versions
GB202011487D0 (en
GB2597504B (en
Inventor
Joseph Cooper Wayne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2011487.2A priority Critical patent/GB2597504B/en
Publication of GB202011487D0 publication Critical patent/GB202011487D0/en
Publication of GB2597504A publication Critical patent/GB2597504A/en
Application granted granted Critical
Publication of GB2597504B publication Critical patent/GB2597504B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
    • C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
    • C25B11/095—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds at least one of the compounds being organic
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/20—Conducting electric current to electrodes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/22—Monitoring arrangements therefor
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
    • C23F2213/31—Immersed structures, e.g. submarine structures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Sealing Devices (AREA)

Abstract

The invention relates to a shaft contact device 1 for maintaining an electrical connection between a vessel drive shaft (W, Fig 2) and an earth point. The device has a bracket 10 for connection to a point spaced from the rotating shaft, a base member 20 mounted on the bracket, a head member 30 having at least one electrically conductive brush 34A and 34B to engage the shaft, a pair of arms 40A and 40B each having a first end connected to spaced pivot points on the base member and a second end connected to spaced pivot points on the head member, and spring means 50 to bias the head towards the shaft to engage the brush on the shaft. In use said base member, head member and spaced arms form a parallelogram arm whereby the head member brushes contact the shaft at a constant angle as the brushes are worn.

Description

T11 LE-Shalt Contact Device The present invention relates to a shaft contact device.
It is common practice to use sacrificial anodes on boats to prevent metallic components from corroding due to electrolysis. Propeller, drive shafts, propellers and gearboxes are "electrically" linked and damage to these by electrolysis can be very costly.
The invention seeks to provide still contact device comma.a:drivnbft, pràpciler and gearbox electriaelly to a sacrificial anode.
According to the present invention, there is provided a shaft contact device to make tut electrical connection between a shaft and an earth point comprising: a) a bracket for connection to a point spaced front the rotating shaft b) abase member mounted on the bracket e) a head member having at least one electrically conductive brush to engage the shaft d) a pair of arms each having a first end connected to spaced pivot points on the base member and a second end connected to spaced pivot points on the head member, and 0) spring means to bias the head towards the shaft to engage the brush on the shaft, , in use said base member, head member and spaced arms forming a parallelogram arm whereby the head member blushes contact the shaft at a constant angle as the brushes are worn Preferably the bracket is adapted to be mounted on a seal through which the shaft extends. The bracket may be mounted on the seal using cable ties. Slots may be provided on the bracket to accommodate the cable ties.
Preferably the bracket is of plastics and heat deformable to adjust its shape to lie adjacent different shapes at the spaced point to which it is to be attached Preferably the spring means spatiscpposingcomers of the parallelogram defined by the arms and the spaced pivot points.
Preferably the arms have elongate recesses to accommodate the spring when the arms come together adjacent each other.
Preferablythebrushe/sarewiStoaterntinaltoconnectwithawireleadingtaanearthp oint such as an anode-Preferably the head includes an electrically conductive contact member adjacent the base of the brush which engages the shaft when the brushes are worn. Preferably an alarm chvoit is provided to generate an alarm when the contact member engages the shaft to Mdicate that brush/es need replacing.
Preferably an alarm circuit is provided to operate an alarm if water is present between the contact member and the terminal to indicate that the shaft seal is leaking.
Preferably the first and/or second ends of the arms can be connected to one of a number of spaced pivot points to adjust the angle of the head member relative to the base member, An embodiment of the invention will now be described with reference to the accompanying drawings in which: Figure 1 shows a perspective view of a shaft contact device, Figure 2 shows a view of the shaft contact device in use on a boat Figure 3 shows a view of the shaft contact device in alternative use on a boat.
Referring to Figure 1 there is shown a shaft contact device 1 to make an electrical connection between a shaft and an earth point such as a sacrificial anode.
Devioe 1 has a bmcket 10 for connection to a point spaced from the shaft, such as a shaft seal e.g.. stem gland Y (see Figure 2 of a type well known in the art). Bracket 10 may be in the form Of a rectangular plate of heat deformable plastics material allowing it to be shaped to accommodate different shapes at the spaced point to which it is to be attached (such as seal W). A number of pairs of slots 11A,I1B are provided to receive cable ties to secure the bracket to a seal or other surface.
A base member 20 is mounted on the bracket 10. Bracket 20 has a slot 21 on a front face 20A. On opposing side walls 2013,20C are first pin holes 22A,2213 and second 23 pin hole to receive pins (not shown) to create a pivots for a pair of aims 40A 408 (see below).
Ahead member 30 is provided. . A slot 31 is provided.between opposing head side walls 3011,30C. On opposing side walls 3013,30C are first put bole 32 and second 33 pin hole to receive pins (not shown) to create a pivots for the pair of arms 40A 4013 (see below).
Head member 30 has, projecting from a lower face 30A, a pair of electrically conductive brushes 34A1.3413 to engage the shaft The bnisties are wired to a terminal 35 to connect with a wire leading to an earth point such as an anode.
A pair of arms 40A,4013 each have a first end connected to spaced pivot points 22A,23 on the base member 20, and a second end connected to spaced pivot points 32,33 on the head member 30. The pivot points 22A,23 and 32,33 are spaced the same distance so that the arms 40A,4013 always remain parallel as they pivot. Aims 40A,40B each have an elongate slot 41A,4113.
Spring means in the form of a coil spring 50 is connected at end tothesecond end of arm 40A and the first end of arm 408 to bias the head downwards as shown in the drawing towards or through the plane of the base. The spring means thus spans opposing corners of the parallelogram defined by the arms and the spaced pivot points. As the arms pivot relative to the base 20 they move towards.and away from each other. When they come together the spring is accommodated in the elongate slots 41A,41B.
As shown in Figure 2, device I may ideally be used ma boat engine installation. In Figure 2,8 rotating shalt W is coupled to a gearbox through a coupling X, Shalt W extends through a stern tube in boat Mill, and has a pmpeller mountedonafteendcf.theshaftasisknown.intheart and not shown. A seal in the form cistern gland 'V surrounds the shalt V is connected to one end of flexible sleeve Z through which the shaft also passes. The other end of sleeve Zis sealed against the boat huh (not shown) Device I of Figure 1 has its base!mitt moulded to the shape of and mounted on gland Y. Device 1 is held in plate on gland Y vrith one or more cable ties 60 passing through slots 11A,118.
In use said base member, head member 30 and spaced alms 40A,40B forming a parallelogram arm whereby the head member brushes contact the shalt at a constant angle (such as normal to the shaft V) as the brushes Head member is also at a fixed angle relative to the base member 20.
In some circumstances it may be necessary to adjust the angle of the head to the base member, in which case the fint end of pivot ann 40A can he secured to pivot point 22B. If desired pivot point 22B could be in a differera location or more than one additional pivot point 22B may be provided. Any pivot point would preferably be spaced the same distance to pivot point 23 and pivot point 22A. Thus the first and/or second ends of the arms can be connected to one of a number of spaced pivot points to adjust the angle of the head it relative to the base member.
Preferably the head includes an electrically conductive contact member 36 adjacent the base of the brush/es which engages the shaft when the brushes are worn. Preferably an almm circuit is provided to generate an alarm when the contact member engages the shaft to indicatti±iat brush/es need replacing.
PreferablY an alarm circuit is provided to operate an alarm if water is present between the contact member and the terminal to indicate that the shaft seat W is leaking.
AsshowninFigurc3,devieel may be mounted on a bulkhead LI and may be used so that the broth/es on head 30 engage the end of coupling X. Although the head.30 is shown in Figures 1 and 2 biased towards or through the plane of base 10, in this Figure 3 the head 30's rotated 180 degrees relative to the ends of arms 40A,40B so that it is biased by the spring means lathe opposite direction.
The invention may take a form different to that specifically described above.
%tither modifications will be apparent to those lied in the art without departing from the scope ofthe present invention.

Claims (2)

  1. CLAIMS1. A shaft contact device to make an electrical connection between a shaft and earth point comprising: a) a bracket for connection to a point spaced from the shaft b) a base member mounted on the bracket, c) a head member having at least one electrically conductive brush to engage the shaft d) a pair of arms each having a first end connected to spaced pivot points on the base member and a second end connected to spaced pivot points on the head member, and e) spring means to bias the head towards the shaft to engage the brush on the shaft, in use said base member, head member anti spaced arms forming a parallelogram arm whereby the head member brushes contact the shaft at a constant angle as the brushes are worn.
  2. 2. A device according to claim I, wherein the bracket is to be mounted on a connection.point through which the shaft extendt 34 A device according to claim I or 2, wherein the bracket may be connected to a connection point using cable ties.4. A device according to claim 3, wherein slots may be provided on the bracket to accomntodate the cable ties.5. A device according to any preceding claim, wherein the bracket is of plastics mid heat deformable to adjust its shape to lie adjacent different shapes at the spaced point to which it is to be attached.6. A device according to any preceding claim, wherein the spring means spans opposing corners of a pamllelograan defined byte arms and the spaced pivot points.7. A device according to any preceding claim, wherein the arms have elongate recesses to accommodate the spring means when the arms mine together adjacent each other.8. A device according any preceding cl wherein the brush/s are wired to a mtinal to connect with a wire leading to an earth point such as an anode, 9. A device according to any preceding claim, wherein the head includes an electrically conductive contact member adjacent the base of the brush which engages the shaft when the brushes are worn, 10. A device according to claim 9, wherein an alarm circuit is provided to generate an alarm when the contact member engages the shaft to indicate that brush/es need replacing.11. A device according to claim 9, wherein an alarm circuit is provided to operate an alarm if water is present between the contact member and the terminal to indicate that the shaft seal is 12. A device according to any preceding claim, wherein the firstand/or second ends of the arms can be connected to one of a number of spaced pivot points to adjust the angle of the head member relative to the base member.13. A boat propulsion ' lation incorporating the device according to any preceding claim.
GB2011487.2A 2020-07-24 2020-07-24 Shaft contact device Active GB2597504B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2011487.2A GB2597504B (en) 2020-07-24 2020-07-24 Shaft contact device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2011487.2A GB2597504B (en) 2020-07-24 2020-07-24 Shaft contact device

Publications (3)

Publication Number Publication Date
GB202011487D0 GB202011487D0 (en) 2020-09-09
GB2597504A true GB2597504A (en) 2022-02-02
GB2597504B GB2597504B (en) 2023-02-01

Family

ID=72339279

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2011487.2A Active GB2597504B (en) 2020-07-24 2020-07-24 Shaft contact device

Country Status (1)

Country Link
GB (1) GB2597504B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB503946A (en) * 1936-07-10 1939-04-11 Joseph Lepage Improvements in or relating to methods of protecting the screws, condensers or otherparts of ships or other marine craft against corrosion
US3049479A (en) * 1958-11-10 1962-08-14 Chemionics Engineering Lab Inc Corrosion-erosion-cavitation protection for marine propellers
US3385254A (en) * 1966-10-14 1968-05-28 Goldberg Sidney Boat electrolysis and static eliminator
GB1462931A (en) * 1973-03-21 1977-01-26 Skarpenord As Propeller shaft in a cathodic protection system for protection of a ships propeller
US5052962A (en) * 1990-05-21 1991-10-01 The United States Of America As Represented By The Secretary Of The Navy Naval electrochemical corrosion reducer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB503946A (en) * 1936-07-10 1939-04-11 Joseph Lepage Improvements in or relating to methods of protecting the screws, condensers or otherparts of ships or other marine craft against corrosion
US3049479A (en) * 1958-11-10 1962-08-14 Chemionics Engineering Lab Inc Corrosion-erosion-cavitation protection for marine propellers
US3385254A (en) * 1966-10-14 1968-05-28 Goldberg Sidney Boat electrolysis and static eliminator
GB1462931A (en) * 1973-03-21 1977-01-26 Skarpenord As Propeller shaft in a cathodic protection system for protection of a ships propeller
US5052962A (en) * 1990-05-21 1991-10-01 The United States Of America As Represented By The Secretary Of The Navy Naval electrochemical corrosion reducer

Also Published As

Publication number Publication date
GB202011487D0 (en) 2020-09-09
GB2597504B (en) 2023-02-01

Similar Documents

Publication Publication Date Title
US4245281A (en) Adjustable hull light assembly
ES2344175T3 (en) DEVICE FOR MOVING AND POSITIONING AN OBJECT IN SPACE.
GB2597504A (en) Shaft contact device
SE439711B (en) REVERSIBLE CONTACT FOR A THREE PHASE AC MOTOR
KR970701665A (en) Tile surfacing for a centrifuge conveyor
CN110626480A (en) Underwater inspection robot
US9784236B2 (en) Flexible water turbine
WO2014074831A2 (en) Improved slip ring devices, systems, and methods
JPH02175499A (en) Conducting resin bushing for propulsion apparatus for ship
US5174717A (en) Cable harness and mounting hardware for propeller deicer
CN112845275A (en) Underwater cleaning robot system
US3636716A (en) Swivel joint connection
US3728748A (en) Mooring apparatus
FR2618911A1 (en) SEISMIC INSPECTION MARINE FLUTE
US20240278876A1 (en) Mooring System for a Floating Wind Turbine
ES2366772T3 (en) SECTIONER FOR A SWITCHING DEVICE.
EP2860111A1 (en) Brush design for propeller deicing system
KR102382466B1 (en) Rope type mooring line underwater cleaning robot
WO2023144593A1 (en) A shaft contact device
KR102217814B1 (en) Hybrid private aid to navigation adaptable to sites with strong tidal currents for observation of ocean-environment
US10938144B2 (en) Electrical connection system suitable for providing cathodic protection underwater
KR101056696B1 (en) Tidal current generator that transmits power by surface contact
EP0230465B1 (en) Boom and boomhead for windsurfer
US3104220A (en) Flexible trailing anode
CN111505427A (en) Lightning protection detection device and flight equipment

Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20220407 AND 20220413