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FR2786462A1 - Propeller ring for use with boat propulsion comprises removable and adjustable ring that is chamfered to increase speed - Google Patents

Propeller ring for use with boat propulsion comprises removable and adjustable ring that is chamfered to increase speed Download PDF

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Publication number
FR2786462A1
FR2786462A1 FR9815090A FR9815090A FR2786462A1 FR 2786462 A1 FR2786462 A1 FR 2786462A1 FR 9815090 A FR9815090 A FR 9815090A FR 9815090 A FR9815090 A FR 9815090A FR 2786462 A1 FR2786462 A1 FR 2786462A1
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France
Prior art keywords
propeller
ring
chamfered
increase speed
removable
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
FR9815090A
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French (fr)
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FR2786462B1 (en
Inventor
Jean Delanoue
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR9815090A priority Critical patent/FR2786462B1/en
Publication of FR2786462A1 publication Critical patent/FR2786462A1/en
Application granted granted Critical
Publication of FR2786462B1 publication Critical patent/FR2786462B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/16—Propellers having a shrouding ring attached to blades

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The ring (A) is affixed to the propeller of a boat. It is removable, and can be adjusted according to the pitch of the propeller. It is chamfered in its interior, and also at its front. This increases the power and hence the speed.

Description

La présente invention concerne une couronne amovible pouvant tre installée sur toutes les hélices de bateaux et surtout sur les moteurs hors-bord. The present invention relates to a removable crown that can be installed on all boat propellers and especially on outboard motors.

Les hélices à couronne existantes sont d'une seule pièce, donc onéreuses et ne peuvent pas tre installées sur les moteurs hors-bord, du fait de la présence dans l'alignement de la couronne, de la prise d'eau et de l'échappement. Existing crown propellers are in one piece, therefore expensive and cannot be installed on outboard motors, due to the presence in alignment of the crown, the water intake and the exhaust.

La couronne amovible permet de ne pas changer d'hélices, et, peut tre installée sur tous types de moteurs à moindre frais. The removable crown makes it possible not to change propellers, and can be installed on all types of engines at low cost.

On sait que la force centrifuge d'une hélice projette une partie de l'eau perpendiculairement à l'axe du bateau. We know that the centrifugal force of a propeller projects part of the water perpendicular to the axis of the boat.

Le fait de fixer une couronne amovible à l'extrémité des pales de l'hélice fait disparaître une grande partie de ce phénomène et donc, de retrouver cette puissance dans l'axe du bateau. The fact of attaching a removable crown to the end of the propeller blades eliminates a large part of this phenomenon and therefore, regains this power in the axis of the boat.

La couronne amovible (A) sera moulée dans une matière plastique appropriée et rigide dans laquelle seront insérées autant de plaques filetées (B) en inox (18/12), que de pales. The removable crown (A) will be molded in a suitable rigid plastic material into which will be inserted as many threaded plates (B) made of stainless steel (18/12) as there are blades.

Ces filetages (C) devant recevoir les vis de fixation des équerres (D) pivotantes, en inox et réglables, servant au maintien de la couronne amovible sur les pales et s'adaptant à tous les pas d'hélices. These threads (C) must receive the fixing screws for the pivoting brackets (D), made of stainless steel and adjustable, used to hold the removable crown on the blades and adapting to all propeller pitches.

Les équerres (D) de liaison couronne amovible hélice seront faites dans le mme matériau inoxydable (18/12) que les plaques filetées. The detachable crown helix connection brackets (D) will be made of the same stainless material (18/12) as the threaded plates.

Elles comporteront un trou rond (E) recevant une vis se fixant dans un des écrous de la plaque filetée. They will have a round hole (E) receiving a screw which is fixed in one of the nuts of the threaded plate.

Un second trou (F) est pratiqué sur la mme branche, mais de forme semi-circulaire afin de recevoir la seconde vis se fixant dans le second écrou de la plaque filetée. A second hole (F) is made on the same branch, but of semi-circular shape in order to receive the second screw fixing in the second nut of the threaded plate.

Cette technique permet le réglage au pas de l'hélice. This technique allows adjustment to the pitch of the propeller.

Sur la seconde branche de l'équerre (D), un trou rond (G) recevra un boulon qui, après percement d'un trou de mme diamètre dans l'extrémité de la pale, permettra de relier l'ensemble. On the second branch of the square (D), a round hole (G) will receive a bolt which, after drilling a hole of the same diameter in the end of the blade, will allow the assembly to be connected.

Les couronnes amovibles seront moulées au diamètre des hélices sans tenir compte du pas de celles-ci.  The removable crowns will be molded to the diameter of the propellers without taking into account their pitch.

Un chanfrein sera pratiqué à l'avant et à l'intérieur pour augmenter la pression, donc la puissance et la vitesse.A chamfer will be made at the front and inside to increase the pressure, therefore the power and the speed.

Les avantages de la couronne amovible sont les :
Installation très rapide à la portée de tous.The advantages of the removable crown are:
Very quick installation within everyone's reach.

-Pas besoin d'outillage spécifique. -No need for specific tools.

-Pas de dépose de l'hélice. -No removal of the propeller.

-Diminution du danger en cas de choc, la couronne amovible protégeant des pales de l'hélice. -Reduced danger in the event of an impact, the removable crown protecting the propeller blades.

-Moins de risque de prendre"un bout"dans l'hélice. -Less risk of taking a "tip" in the propeller.

-Diminution sensible de l'effet de couple et donc, augmentation de la précision de manoeuvre. - Significant decrease in the torque effect and therefore, increase in operating precision.

-Le bateau reste manoeuvrable, mme en cas de panne ou de débrayage du moteur, la couronne amovible faisant office de safran. -The boat remains manoeuvrable, even in the event of engine failure or declutching, the removable crown acting as rudder.

-Diminution sensible de la vague arrière toujours gnante, notamment pour la pche. -Significant reduction in the rear wave, which is always a nuisance, especially for fishing.

A charge pour les concepteurs d'hélices, de créer des formes nouvelles, pour augmenter encore l'efficacité de la couronne amovible en adaptant l'extrémité de leurs pales à la forme de la couronne amovible. It is up to propeller designers to create new shapes to further increase the efficiency of the removable crown by adapting the end of their blades to the shape of the removable crown.

La simplicité et la facilité de la mise en place, alliée à la modicité de son prix de revient, permettent de prévoir une vente importante de la couronne amovible.  The simplicity and ease of installation, combined with the low cost price, make it possible to foresee a significant sale of the removable crown.

Claims (2)

REVENDICATIONS 1. Couronne pour hélices de bateaux, caractérisée par le fait qu'elle soit démontable et réglable, quel que soit le pas de l'hélice. CLAIMS 1. Crown for boat propellers, characterized in that it is removable and adjustable, whatever the pitch of the propeller. 2. Couronne selon la revendication 1, caractérisée en ce qu'elle est chanfreinée à l'intérieur et à l'avant pour augmenter la puissance, donc la vitesse. 2. Crown according to claim 1, characterized in that it is chamfered inside and at the front to increase the power, therefore the speed.
FR9815090A 1998-11-26 1998-11-26 REMOVABLE CROWN, FIXED BY ALL APPROPRIATE MEANS, AT THE END OF THE BLADES OF THE PROPELLERS AND CAN BE FIXED ON ALL ENGINES, EVEN OUTBOARD, WITHOUT DISMANTLING THE PROPELLER Expired - Fee Related FR2786462B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9815090A FR2786462B1 (en) 1998-11-26 1998-11-26 REMOVABLE CROWN, FIXED BY ALL APPROPRIATE MEANS, AT THE END OF THE BLADES OF THE PROPELLERS AND CAN BE FIXED ON ALL ENGINES, EVEN OUTBOARD, WITHOUT DISMANTLING THE PROPELLER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9815090A FR2786462B1 (en) 1998-11-26 1998-11-26 REMOVABLE CROWN, FIXED BY ALL APPROPRIATE MEANS, AT THE END OF THE BLADES OF THE PROPELLERS AND CAN BE FIXED ON ALL ENGINES, EVEN OUTBOARD, WITHOUT DISMANTLING THE PROPELLER

Publications (2)

Publication Number Publication Date
FR2786462A1 true FR2786462A1 (en) 2000-06-02
FR2786462B1 FR2786462B1 (en) 2007-02-16

Family

ID=9533387

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9815090A Expired - Fee Related FR2786462B1 (en) 1998-11-26 1998-11-26 REMOVABLE CROWN, FIXED BY ALL APPROPRIATE MEANS, AT THE END OF THE BLADES OF THE PROPELLERS AND CAN BE FIXED ON ALL ENGINES, EVEN OUTBOARD, WITHOUT DISMANTLING THE PROPELLER

Country Status (1)

Country Link
FR (1) FR2786462B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006002464A1 (en) * 2004-07-01 2006-01-12 Ringprop Trading Limited Shroud or ring propeller blade interface

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE457638A (en) *
GB137277A (en) * 1918-12-30 1920-07-08 Alpheus Augustus Peart Improvements in propellers
DE814713C (en) * 1949-02-18 1951-09-24 Luebbe Schnitger Propeller for ship propulsion with hydrofoil-like casing
US5096382A (en) * 1989-05-17 1992-03-17 Gratzer Louis B Ring-shrouded propeller
GB2322166A (en) * 1997-02-15 1998-08-19 Elta Fans Ltd Fan with adjustable blades

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE457638A (en) *
GB137277A (en) * 1918-12-30 1920-07-08 Alpheus Augustus Peart Improvements in propellers
DE814713C (en) * 1949-02-18 1951-09-24 Luebbe Schnitger Propeller for ship propulsion with hydrofoil-like casing
US5096382A (en) * 1989-05-17 1992-03-17 Gratzer Louis B Ring-shrouded propeller
GB2322166A (en) * 1997-02-15 1998-08-19 Elta Fans Ltd Fan with adjustable blades

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VAN GUNSTEREN L A: "Ring Propellers", TRANSACTIONS OF THE INSTITUTE OF MARINE ENGINEERS., vol. 83, 13 April 1971 (1971-04-13), LONDON., GB, pages 21 - 36, XP002110809 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006002464A1 (en) * 2004-07-01 2006-01-12 Ringprop Trading Limited Shroud or ring propeller blade interface

Also Published As

Publication number Publication date
FR2786462B1 (en) 2007-02-16

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Effective date: 20100730