EP0285007A1 - Bateau comprenant un système amortisseur de vibrations - Google Patents

Bateau comprenant un système amortisseur de vibrations Download PDF

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Publication number
EP0285007A1
EP0285007A1 EP88104771A EP88104771A EP0285007A1 EP 0285007 A1 EP0285007 A1 EP 0285007A1 EP 88104771 A EP88104771 A EP 88104771A EP 88104771 A EP88104771 A EP 88104771A EP 0285007 A1 EP0285007 A1 EP 0285007A1
Authority
EP
European Patent Office
Prior art keywords
shell
watercraft
fact
skid
float
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Withdrawn
Application number
EP88104771A
Other languages
German (de)
English (en)
Inventor
Giuseppe Babbini
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
Publication of EP0285007A1 publication Critical patent/EP0285007A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
    • B63B1/18—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type
    • B63B1/22—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydroplane type with adjustable planing surfaces

Definitions

  • the present invention relates to a watercraft featuring a built-in water vibration damping system.
  • the present invention relates to a water­craft, preferably of the glider type, having streamlined surfaces which, normally immersed when the craft is sta­tionary, provide for producing a load-bearing effect for raising the said surfaces into contact with the surface of the water, when the craft is operated in excess of a given predetermined speed.
  • a major drawback in the design of watercraft in general, and the aforementioned type in particular, is that, due to the singularities of the water surface and the rigidity of the hull, forces and moments are transmitted by the water to the wetted surface of the hull, which forces and moments may result in a sharp change in trim, if not com­plete detachment of the hull from the surface of the water.
  • the aim of the present invention is to provide a water­craft of the aforementioned type designed to substantial strictlyly overcome the aforementioned drawback.
  • a watercraft preferably of the glider type, characterised by the fact that it comprises an "un­suspended” portion designed to contact the water, and a “suspended” portion preferably connected to at least a drive assembly and preferably comprising at least a single-passenger compartment; the said "suspended” and “unsuspended” portions being connected via the interposi­tion of a device for damping the vibration transmitted, in use, between the water and the said "unsuspended” por­tion.
  • Number 1 in Fig.s 1 and 2 indicates a watercraft comprising an outer shell 2 having streamlined bottom surfaces 3 designed to glide over and in contact with the surface of the water; and an inner shell 4 having an upper passen­ger compartment 5 and a rear engine compartment 6.
  • the said outer shell 2 presents a peri­pheral outer flange 7 extending outwards from the top edge of shell 2.
  • the said inner shell 4 presents, along its top edge, a peripheral outer flange 8 located over flange 7 and the free peripheral end of which blends with the top end of a dummy outer side panel 9 surrounding the outside of flange 7.
  • Dummy side panel 9 extends down­wards from flange 8 and presents, on its bottom edge, an inner flange 10 underneath flange 7 and facing both flan­ges 7 and 8.
  • a damping de­vice 11 comprising a first number of springs 12 or similar damping elements located between bottom wall 13 of shell 4 and opposite bottom wall 15 of shell 2; and a second number of springs or similar damping elements 16 located between flanges 8 and 10.
  • outer shell 2 constitutes an "unsuspended" mass sub­jected to all the long- and short-wave vibration transmit­ted, in use, by contact with the surface of the water; whereas shell 4 constitutes a "suspended” mass subjected only to long-wave oscillation, if any.
  • damping device 11 prevents any transmission to inner shell 4 of the vi­bration imparted on outer shell 2 by the water surface over which craft 1 is traveling, thus preventing any ver­tical inertial movement which, by affecting the position of both the drive assembly and passenger compartment 5 in relation to the surface of the water, would otherwise result in discomfort to passengers, and possibly also affect the speed of the drive assembly, with consequent overconsumption and damage to drive line components and propellers.
  • the Fig.3 and 4 embodiment relates to a watercraft 17 com­prising an upper shell 18 having a passenger compartment 19 and housing an aft drive assembly 20.
  • Shell 18 presents two lateral wings 21 beneath each of which is provided a float or skid 22 having streamlined surfaces 23.
  • Each skid 22 is connected to the respective wing 21 via the interposition of a damping device 24 comprising a front damper 25 with a respective coaxial damping spring 26, and a rear damper 27 with a respective coaxial damping spring 28.
  • each front damper 25 is secured by its base to respective skid 22, and is connected to respective wing 21 via a cylindri­cal hinge 29 arranged crosswise in relation to the axis of craft 17.
  • Each rear damper 27, on the other hand, is connected to respective skid 22 and respective wing 21 via cylindrical hinges 30 and 31 parallel with hinge 29.
  • the Fig.5 and 6 embodiment relates to a watercraft 32 com­prising an intermediate shell 33 having a passenger com­partment 34 and housing two aft drive assemblies 35. On opposite sides of intermediate shell 33 there are provided two floats or skids 36, each connected to shell 33 via a respective damping device 37.
  • each damping device 37 comprises a front suspension 38 and a rear suspension 39.
  • Each front suspension 38 comprises an articulated paral­lelogram 40 lying in a substantially vertical plane and, in turn, comprising two substantially vertical bars 41 and 42 respectively integral with skid 36 and intermediate shell 33, and two superimposed rods 43 and 44 arranged substantially horizontally and the end of which are con­nected to bar 41 and 42 via spherical hinges 45.
  • upper rod 43 consists of two portions 46 and 47 connected by a dual-acting hydraul­ic damper 48 which, in addition to absorbing axial stress on rod 43, enables the length of rod 43 to be adjusted so as to adjust the position of respective skid 36 and gradually increase the wetted surface of the same as speed is reduced.
  • Lower rod 44 extends in­side shell 33 and beyond respective hinge 45 in the form of an integral arm 49, which is located between a top and bottom longitudinal structural element 51 and 50 of shell 33, and is connected to the said opposed structural ele­ments 50 and 51 by means of two spring systems 52 and 53.
  • Each rear suspension 39 comprises a substantially horizon­ tal rod 54 extending between the said bars 41 and 42 and connected to the same by means of a spherical hinge 55 and a cylindrical longitudinal hinge 56 respectively.
  • Rod 54 extends inside shell 33 and beyond respective hinge 56 in the form of an integral arm 57 located between structural elements 50 and 51 of shell 33 and connected to the same by means of two spring systems 58 and 59.
  • Suspensions 38 and 39 thus enable each skid 36 to adjust its position in relation to shell 33 about both the longi­tudinal axis of hinge 56 and the axis of respective rod 54, and are especially effective when applied to a compe­tition craft.
  • the Fig.7 embodiment relates to a hydrofoil boat 60, the center shell 61 of which presents a passenger com­partment and is connected to two front side skids 62 and a rear skid 63 by means of respective struts 64, each com­prising a tubular bottom rod 65 and a top rod 66 connected telescopically. Telescopic slide of each rod 66 and re­spective rod 65 is regulated by a respective damping de­vice 67 comprising a spring 68.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Vibration Prevention Devices (AREA)
EP88104771A 1987-03-31 1988-03-24 Bateau comprenant un système amortisseur de vibrations Withdrawn EP0285007A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8767254A IT1208360B (it) 1987-03-31 1987-03-31 Natante con sistema smorzatore incorporato delle vibrazioni trasmesse dall acqua
IT6725487 1987-03-31

Publications (1)

Publication Number Publication Date
EP0285007A1 true EP0285007A1 (fr) 1988-10-05

Family

ID=11300880

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88104771A Withdrawn EP0285007A1 (fr) 1987-03-31 1988-03-24 Bateau comprenant un système amortisseur de vibrations

Country Status (2)

Country Link
EP (1) EP0285007A1 (fr)
IT (1) IT1208360B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993011993A1 (fr) * 1991-12-12 1993-06-24 Olivier Moulin Suspension nautique
FR2829098A1 (fr) * 2001-09-06 2003-03-07 Creations E C B Et Bateau leger et rapide
US7434525B2 (en) * 2004-09-30 2008-10-14 Christopher Graham Hodge Suspension system for a boat
DE102011056384A1 (de) 2011-12-14 2013-06-20 Illbruck Sanitärtechnik GmbH Verfahren zum Einbau eines Wannenträgers bzw. eines bodenebenen Duschbodenelementes, Wannenträger und Einbauset
GB2513294A (en) * 2013-02-27 2014-10-29 Ctruk Group Ltd Boats
US11091259B2 (en) 2019-11-08 2021-08-17 Piercecraft Ip Ltd. Ground effect craft

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1080727A (fr) * 1953-04-22 1954-12-13 Nouveaux bateaux de course
FR1199859A (fr) * 1957-07-17 1959-12-16 Bateau à moteur à surface hydrodynamique portante reliée élastiquement au bateau
US3401663A (en) * 1966-12-27 1968-09-17 John V. Yost Catamaran boat construction with center spray shield
US3707938A (en) * 1970-08-03 1973-01-02 J Olson Self-propelled water vehicle
DE2301658A1 (de) * 1973-01-13 1974-07-18 Otto Heinrich Graf Hagenburg Wasserfahrzeug, insbesondere motorboot
FR2334558A1 (fr) * 1975-12-10 1977-07-08 Hervier Christian Moto nautique
GB2150083A (en) * 1983-11-19 1985-06-26 Simon Harris Boat with suspension

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1080727A (fr) * 1953-04-22 1954-12-13 Nouveaux bateaux de course
FR1199859A (fr) * 1957-07-17 1959-12-16 Bateau à moteur à surface hydrodynamique portante reliée élastiquement au bateau
US3401663A (en) * 1966-12-27 1968-09-17 John V. Yost Catamaran boat construction with center spray shield
US3707938A (en) * 1970-08-03 1973-01-02 J Olson Self-propelled water vehicle
DE2301658A1 (de) * 1973-01-13 1974-07-18 Otto Heinrich Graf Hagenburg Wasserfahrzeug, insbesondere motorboot
FR2334558A1 (fr) * 1975-12-10 1977-07-08 Hervier Christian Moto nautique
GB2150083A (en) * 1983-11-19 1985-06-26 Simon Harris Boat with suspension

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993011993A1 (fr) * 1991-12-12 1993-06-24 Olivier Moulin Suspension nautique
FR2829098A1 (fr) * 2001-09-06 2003-03-07 Creations E C B Et Bateau leger et rapide
US7434525B2 (en) * 2004-09-30 2008-10-14 Christopher Graham Hodge Suspension system for a boat
DE102011056384A1 (de) 2011-12-14 2013-06-20 Illbruck Sanitärtechnik GmbH Verfahren zum Einbau eines Wannenträgers bzw. eines bodenebenen Duschbodenelementes, Wannenträger und Einbauset
GB2513294A (en) * 2013-02-27 2014-10-29 Ctruk Group Ltd Boats
US11091259B2 (en) 2019-11-08 2021-08-17 Piercecraft Ip Ltd. Ground effect craft
US11260969B2 (en) 2019-11-08 2022-03-01 Piercecraft Ip Ltd. Ground effect craft
US11383833B2 (en) 2019-11-08 2022-07-12 Piercecraft Ip Ltd. Ground effect craft
US11613352B2 (en) 2019-11-08 2023-03-28 Piercecraft Ip Ltd. Ground effect craft

Also Published As

Publication number Publication date
IT1208360B (it) 1989-06-12
IT8767254A0 (it) 1987-03-31

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