EP0478520B1 - Hydraulic stern drive for boats - Google Patents

Hydraulic stern drive for boats Download PDF

Info

Publication number
EP0478520B1
EP0478520B1 EP91830395A EP91830395A EP0478520B1 EP 0478520 B1 EP0478520 B1 EP 0478520B1 EP 91830395 A EP91830395 A EP 91830395A EP 91830395 A EP91830395 A EP 91830395A EP 0478520 B1 EP0478520 B1 EP 0478520B1
Authority
EP
European Patent Office
Prior art keywords
drive
movable portion
stern
hydraulic
boat
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.)
Expired - Lifetime
Application number
EP91830395A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0478520A1 (en
Inventor
Andrea C/O Hydromarin S.R.L. Fenyo
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.)
HYDROMARINE Srl
Original Assignee
HYDROMARINE Srl
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 HYDROMARINE Srl filed Critical HYDROMARINE Srl
Publication of EP0478520A1 publication Critical patent/EP0478520A1/en
Application granted granted Critical
Publication of EP0478520B1 publication Critical patent/EP0478520B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B63H23/22—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing
    • B63H23/26—Transmitting power from propulsion power plant to propulsive elements with non-mechanical gearing fluid

Definitions

  • the present invention relates to a stern drive for boats, said drive being of a hydraulic operated type.
  • conventional stern drives transfer mechanical power from the primary motor or engine to the boat propeller, by exclusively using mechanical elements, such as cardanic joints, shafts, resilient joints or couplings, motion reversing units, gear wheels and the like.
  • the above mentioned prior drives allow a maximum turning angle of about 60-65° related to a horizontal axis and of about ⁇ 35° with respect to a vertical axis.
  • US-A-3 847 107 shows a stern drive according to the preamble of claim 1.
  • the connection between the fixed portion and the movable portion of the known drive is performed by an intermediate member which is pivoted to the fixed portion about a horizontal axis and to the movable portion about a vertical axis.
  • the known drive is disadvantageous in that it is of increased size due to the to axes not intersecting each other.
  • the main object of the present invention is to overcome the above mentioned drawback, by providing a stern drive for boats which allows a greater turning range of the drive assembly both about a vertical axis and about a horizontal axis.
  • Another object of the present invention is to provide such a drive which can transmit to the boat propeller a power as great as possible, even under great angle turning conditions.
  • Yet another object of the present invention is to provide such a stern drive for boat which is very reliable in operation.
  • the stern drive for boats essentially comprises a fixed portion indicated generally at 1, flange coupled to the stern board or transom 2 of the boat, and a movable portion 3 including a hydraulic motor assembly 4 driving a propeller 5.
  • the fixed portion is moreover provided with hydraulic fixtures 6, either of the threaded or flanged type, for supplying the hydraulic motor with a pressurized hydraulic fluid delivered from a pump 7 in turn driven by a primary motor or engine 8.
  • Said movable portion 3 substantially comprises the drive assembly proper and a mechanism 9 for allowing the bottom or foot of the drive assembly to be raised off water, by a movement about a suitable horizontal axis, and the boat to turn, by a movement about a suitable vertical axis.
  • This suspension system in particular, comprises a cross journal 10 which, in addition to allowing the movable portion 3 to be displaced about the mentioned axes, is also adapted to transfer the several forces or stresses from the movable to the fixed portion of the drive and, hence, to the boat hull.
  • the cross journal moreover, will transmit from the fixed portion to the movable portion, by means of suitable ducts 11, the hydraulic power fluid required for driving the boat.
  • a main feature of the present invention is that a broad raising and turning angle range is provided thereby.
  • cross journal provides raising and turning angles which are much greater than those provided by conventional prior mechanical driving assemblies.
  • a primary driving or motor 8-pump 7 assembly can be provided cooperating with a like emergency assembly, indicated generally at 13.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Motor Power Transmission Devices (AREA)
  • Lubricants (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Hydraulic Motors (AREA)
EP91830395A 1990-09-25 1991-09-25 Hydraulic stern drive for boats Expired - Lifetime EP0478520B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2156090 1990-09-25
IT02156090A IT1243039B (it) 1990-09-25 1990-09-25 Trasmissione poppiera per imbarcazioni, a funzionamento idraulico.

Publications (2)

Publication Number Publication Date
EP0478520A1 EP0478520A1 (en) 1992-04-01
EP0478520B1 true EP0478520B1 (en) 1994-12-07

Family

ID=11183611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91830395A Expired - Lifetime EP0478520B1 (en) 1990-09-25 1991-09-25 Hydraulic stern drive for boats

Country Status (6)

Country Link
EP (1) EP0478520B1 (es)
JP (1) JPH04244499A (es)
AT (1) ATE115080T1 (es)
DE (1) DE69105687T2 (es)
ES (1) ES2066412T3 (es)
IT (1) IT1243039B (es)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB961740A (en) * 1962-06-13 1964-06-24 Stone Manganese Marine Ltd Improvements relating to bow steering installations for ships
US3847107A (en) * 1973-02-16 1974-11-12 C Buddrus Hydraulic marine propulsion and guidance system
IT1204162B (it) * 1986-05-12 1989-03-01 Rodriquez Spa Impianto di propulsione navale a trasmissione idraulica
US4878864A (en) * 1986-06-30 1989-11-07 Bentem Fransiscus C A Van Outboard thruster with direct drive hydraulic motor

Also Published As

Publication number Publication date
IT1243039B (it) 1994-05-23
ATE115080T1 (de) 1994-12-15
DE69105687T2 (de) 1995-04-13
IT9021560A1 (it) 1992-03-25
IT9021560A0 (it) 1990-09-25
JPH04244499A (ja) 1992-09-01
DE69105687D1 (de) 1995-01-19
ES2066412T3 (es) 1995-03-01
EP0478520A1 (en) 1992-04-01

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