US2963000A - Propeller guard and rudder device - Google Patents

Propeller guard and rudder device Download PDF

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Publication number
US2963000A
US2963000A US797215A US79721559A US2963000A US 2963000 A US2963000 A US 2963000A US 797215 A US797215 A US 797215A US 79721559 A US79721559 A US 79721559A US 2963000 A US2963000 A US 2963000A
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guard
propeller
rudder
plate
slot
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US797215A
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Amos M Fester
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose

Definitions

  • PRQFELLER GUARD AND RUDDER DEVICE Filed March 4, 1959 INVENTOR. 5 Q1140: M FEsne-p A TT EA/E y United States Patent 'PROPELLER GUARD A ND RUDDER DEVICE Amos M. Foster, 7344 Sheridan 8., Richfield, Minn.
  • This invention relates to a combination propeller guard and rudder means and has special reference to guards for propellers of outboard motors or thfillkew
  • An object of this invention is to provide an improved guard for use in protecting propellers from injury by any submerged materials or substances, such as rocks and stones, or logs and trees, and also to prevent interference with lines used in trolling or other fishing activities.
  • Figure 1 is a side elevational view of the improved combined propeller guard and rudder means mounted on the lower portion of an outboard motor body.
  • Figure 2 is a plan view of the combined propeller guard and rudder means as shown in Figure 1.
  • Figure 3 is an elevation view of the rear of the combined guard and rudder device.
  • the combined propeller guard and rudder means is designated generally at 20.
  • the guard 24 comprises a relatively large open ended cylindrical body member of the same diameter throughout its length.
  • the top of the body member 24 is formed with a longitudinal slot 26 extending its complete length for a purpose set forth hereinafter.
  • a notch 28 is formed on the bottom of the body member 24 adjacent the front thereof receiving the lower end of the vertical leading rib 18 of the outboard motor for aiding in holding the outboard motor in proper position in the body member 24.
  • the rudder means 20 also comprises a horizontal plate 32 which is of rectangular shape at its approximately rear one third as at 34, while the approximately front two thirds of the plate 32 is tapered as at 36 to a front point 38.
  • the plate 32 is provided with a longitudinal slot 40 extending from its rear end to contiguous its front end 38.
  • the upper ends 25 of the cylindrical member 24 are secured by appropriate means to the under side of the plate 32 intermediate the ends thereof thus aligning the slot 26 in the cylindrical member 24 with the slot 40 in the plate 32.
  • Plate 32 is provided with a depending flange 42, 42 on the opposite sides at the rear one third 34 of plate 32.
  • the body of outboard motor is moved into the slot 40 of plate 32 with the horizontal glider ribs 14 thereof engaging the top surface of the plate 32 contiguous the slot 40.
  • the body of the outboard motor is moved to the front of the slot 40 and at such a position the pro peller 12 is axially disposed Within the cylindrical body 24, and the lower end of the vertical leading rib 18 is received in the notch 28 on the bottom of the member 24.
  • the rear portions of the ribs 14 on the motor body are received into recess means 35 on the front of plate 32 formed by bent over flange means 37 thereof to aid in mounting the guard in the motor body.
  • a securing means 50 is provided with a notch 52 in its front end.
  • the front portion of the ribs 14 fit into the notch 52 of the securing means 50 for aid in holding the propeller 12 of the motor within the member 24.
  • the securing means 50 is seamed to top of the plate 32 by bolt and nut means 53. The securing means 50 is easily dismantled from the guard and rudder device so that the guard can be readily demounted from the outboard motor.
  • the cylindrical guard 24 protects the propeller 12 from being damaged by unknown objects in the water.
  • the cylindrical guard 24 offers a minimum drag to the water so that the efiiciency of operation of the outboard motor is not materially reduced.
  • the rear of plate 32 prevents the water thrust by the propeller 12 from rapidly rising to the surface of the water thus increasing the thrust of the propeller and reducing the turbulence created by the propeller.
  • the rudder device 20 which comprises the plate 32 and its depending flanges 42 tends to lift the boat upwards in the water thus providing a buoyancy to the boat and reducing the drag of the guard device 24 in the water.
  • the flanges 42 in cooperation with the horizontal plate 32 aids in steering the boat more easily especially in turbulent waters at slow speeds.
  • a combination propeller guard and rudder means for attachment to an outboard motor body provided with a propeller, the guard comprising an open ended cylindrical conduit member adapted to house said propeller axially therein, the top of said conduit member formed with a longitudinal slot for receiving a first portion of the motor body, a means formed on the bottom of the conduit member for receiving a second portion of the motor body, rudder means comprising a plate provided Patented Dec. 6, 1960 with spaced depending flanges mounted on the top of the conduit member, the plate of the rudder means provided with a longitudinal slotin alignment with the slot means in the conduit member for receiving the said first portion of the motor body, and means for detachably securing the rudder and guard means to the said first portion of the motor body.
  • the means for detachably securing the guard and rudder means to the first portion of the motor body comprises a bar means provided with a slot for receiving the said first portion of the motor body.
  • the rudder means comprises a horizontal plate which gradually tapers at its front end and the flanges are formed on the opposite sides contiguous its rear end.
  • a combination propeller guard and rudder means for attachment to an outboard motor body provided with a propeller
  • the guard comprising a tubular member adapted to house said propeller axially therein, the top of said tubular member provided with a slot means for receiving a portion of the motor body
  • the rudder means comprising a plate provided with spaced depending flanges mounted on the top of the tubular member, the plate of the rudder means provided with a slot in alignment with the slot means in the said member for receiving the said portion of the motor body.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Exhaust Silencers (AREA)

Description

Dec; 6, 1960 A. M. FESTER 2,963,000
PRQFELLER GUARD AND RUDDER DEVICE Filed March 4, 1959 INVENTOR. 5 Q1140: M FEsne-p A TT EA/E y United States Patent 'PROPELLER GUARD A ND RUDDER DEVICE Amos M. Foster, 7344 Sheridan 8., Richfield, Minn.
Filed Ma!- 4, 1959, Ser. No. 797,215
This invention relates to a combination propeller guard and rudder means and has special reference to guards for propellers of outboard motors or thfillkew An object of this invention is to provide an improved guard for use in protecting propellers from injury by any submerged materials or substances, such as rocks and stones, or logs and trees, and also to prevent interference with lines used in trolling or other fishing activities.
It is another object of this invention to provide a guard for outboard motor propellers which is so constructed to add the minimum amount of weight and drag consistent with full protection of the motor and propeller.
It is still another object of this invention to provide in a combination guard and rudder means with means for readily and quickly mounting it on an outboard motor.
It is a further object of this invention to provide in a combination guard for the propeller of outboard motors and a rudder means which is designed to adequately control the boat in different boating maneuvers.
It is still a further object of this invention to provide a guard for the propeller of an outboard motor wh.ch prevents the human body from coming into contact with such propellers thus preventing cutting and mutilation of persons in the water adjacent the boat.
The above and other objects, features, advantages and capabilities will become apparent from a detailed description of the accompanying drawing, in which I have illustrated the preferred form of my invention. However, I do not wish to be limited to the particular form except as hereinafter described in the appended claims.
Figure 1 is a side elevational view of the improved combined propeller guard and rudder means mounted on the lower portion of an outboard motor body.
Figure 2 is a plan view of the combined propeller guard and rudder means as shown in Figure 1.
Figure 3 is an elevation view of the rear of the combined guard and rudder device.
Referring to the drawing in detail, designates the 'lower portion of a conventional outboard motor, the propeller thereof being shown at 12. Above the propeller 12, the motor body is formed with the usual horizontal glider ribs 14, 14 and with the vertical trailing rib or vane 16. The body of the motor is likewise formed forwardly of the propeller 12 with the vertical leading rib 18.
The combined propeller guard and rudder means is designated generally at 20. The guard 24 comprises a relatively large open ended cylindrical body member of the same diameter throughout its length. The top of the body member 24 is formed with a longitudinal slot 26 extending its complete length for a purpose set forth hereinafter. A notch 28 is formed on the bottom of the body member 24 adjacent the front thereof receiving the lower end of the vertical leading rib 18 of the outboard motor for aiding in holding the outboard motor in proper position in the body member 24. I
The rudder means 20 also comprises a horizontal plate 32 which is of rectangular shape at its approximately rear one third as at 34, while the approximately front two thirds of the plate 32 is tapered as at 36 to a front point 38. The plate 32 is provided with a longitudinal slot 40 extending from its rear end to contiguous its front end 38. The upper ends 25 of the cylindrical member 24 are secured by appropriate means to the under side of the plate 32 intermediate the ends thereof thus aligning the slot 26 in the cylindrical member 24 with the slot 40 in the plate 32. Plate 32 is provided with a depending flange 42, 42 on the opposite sides at the rear one third 34 of plate 32.
-The body of outboard motor is moved into the slot 40 of plate 32 with the horizontal glider ribs 14 thereof engaging the top surface of the plate 32 contiguous the slot 40. The body of the outboard motor is moved to the front of the slot 40 and at such a position the pro peller 12 is axially disposed Within the cylindrical body 24, and the lower end of the vertical leading rib 18 is received in the notch 28 on the bottom of the member 24. The rear portions of the ribs 14 on the motor body are received into recess means 35 on the front of plate 32 formed by bent over flange means 37 thereof to aid in mounting the guard in the motor body.
A securing means 50 is provided with a notch 52 in its front end. The front portion of the ribs 14 fit into the notch 52 of the securing means 50 for aid in holding the propeller 12 of the motor within the member 24. The securing means 50 is seamed to top of the plate 32 by bolt and nut means 53. The securing means 50 is easily dismantled from the guard and rudder device so that the guard can be readily demounted from the outboard motor.
The cylindrical guard 24 protects the propeller 12 from being damaged by unknown objects in the water. The cylindrical guard 24 offers a minimum drag to the water so that the efiiciency of operation of the outboard motor is not materially reduced. The rear of plate 32 prevents the water thrust by the propeller 12 from rapidly rising to the surface of the water thus increasing the thrust of the propeller and reducing the turbulence created by the propeller.
The rudder device 20 which comprises the plate 32 and its depending flanges 42 tends to lift the boat upwards in the water thus providing a buoyancy to the boat and reducing the drag of the guard device 24 in the water. The flanges 42 in cooperation with the horizontal plate 32 aids in steering the boat more easily especially in turbulent waters at slow speeds.
The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being ind'cated by the appended claims rather than by the foregoing description, and all changes which come with-n the meaning and range of equivalency of the claims are, therefore, intended to be embraced therein.
What is claimed is:
1. In a combination propeller guard and rudder means for attachment to an outboard motor body provided with a propeller, the guard comprising an open ended cylindrical conduit member adapted to house said propeller axially therein, the top of said conduit member formed with a longitudinal slot for receiving a first portion of the motor body, a means formed on the bottom of the conduit member for receiving a second portion of the motor body, rudder means comprising a plate provided Patented Dec. 6, 1960 with spaced depending flanges mounted on the top of the conduit member, the plate of the rudder means provided with a longitudinal slotin alignment with the slot means in the conduit member for receiving the said first portion of the motor body, and means for detachably securing the rudder and guard means to the said first portion of the motor body.
2. In a device as set forth in claim 1 wherein the cylindrical conduit is provided with the same diameter throughout its entire length.
3. In a device as set forth in claim 1 wherein the flanges on the rudder means are spaced on the opposite edges of the plate.
4. In a device as set forth in claim 1 wherein the means for detachably securing the guard and rudder means to the first portion of the motor body comprises a bar means provided with a slot for receiving the said first portion of the motor body.
5'. In a device as set forth in claim 1 wherein the rudder means comprises a horizontal plate which gradually tapers at its front end and the flanges are formed on the opposite sides contiguous its rear end.
6. In a combination propeller guard and rudder means for attachment to an outboard motor body provided with a propeller, the guard comprising a tubular member adapted to house said propeller axially therein, the top of said tubular member provided with a slot means for receiving a portion of the motor body, the rudder means comprising a plate provided with spaced depending flanges mounted on the top of the tubular member, the plate of the rudder means provided with a slot in alignment with the slot means in the said member for receiving the said portion of the motor body.
7. In a device as set forth in claim 6 wherein the flanges on the rudder means are formed on the opposite sides of the plate adjacent its rear end.
References Cited in the file of this patent UNITED STATES PATENTS 2,551,371 Grigg May 1, 1951
US797215A 1959-03-04 1959-03-04 Propeller guard and rudder device Expired - Lifetime US2963000A (en)

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3075491A (en) * 1961-11-24 1963-01-29 Frank M Hogan Propeller guard for outboard motors
US3149605A (en) * 1962-03-01 1964-09-22 Maremont Corp Outboard propulsion unit steering assist apparatus
US3885516A (en) * 1973-10-04 1975-05-27 Miroslav Uroshevich Propulsion unit for a water-ski towing device
JPS5164400U (en) * 1974-11-15 1976-05-20
US4205618A (en) * 1977-01-18 1980-06-03 Olsson Gerhard G R Trimming and stabilizing systems
US4487152A (en) * 1974-06-24 1984-12-11 Wilfred Larson Boat stabilizer
US4680017A (en) * 1986-03-10 1987-07-14 Eller Dennis E Motorboat propeller guard for improved performance
US4744779A (en) * 1986-12-04 1988-05-17 Ferrero & Wepfer Outboard motor cavitation plate extension
US4832634A (en) * 1987-12-16 1989-05-23 Kearns Alvin L Flow control and protector device for an outboard motor
US4993978A (en) * 1990-03-12 1991-02-19 Johannes John T Boat motor reflector
US4995840A (en) * 1989-08-04 1991-02-26 Hydrofoil International, Inc. Stabilizing fin for a motor boat
US5107786A (en) * 1990-02-09 1992-04-28 Marine Dynamics, Inc. Adjustable boat stabilizer
US5138966A (en) * 1991-02-12 1992-08-18 Attwood Corporation Hydrofoil for marine outboard engine/marine outdrive
US5344346A (en) * 1993-09-07 1994-09-06 Griffin Clarence A Driveshaft housing attachment
US5588390A (en) * 1995-12-22 1996-12-31 French; Leon D. Universal cavitation plate system
US5848922A (en) * 1997-05-30 1998-12-15 Itima; Romeo Hydrofoil stabilizer for marine motor
US5975969A (en) * 1997-03-21 1999-11-02 Cal-Neva Marine Co. Inc. Hydrofoil propeller guard
US6159062A (en) * 1997-04-24 2000-12-12 Taylor, Jr.; Guy High performance boat prop guard
US6162104A (en) * 1997-03-21 2000-12-19 White; John Forrest Hydrofoil propeller guard
WO2002057134A1 (en) * 2001-01-18 2002-07-25 Schultz William C Thrust enhancing propeller guard assembly
US6425787B1 (en) 2000-09-22 2002-07-30 Brian R. Hersom Outboard reflector kit
US20090149090A1 (en) * 2005-08-22 2009-06-11 Honda Motor Co., Ltd. Boat propulsion engine
US20090314195A1 (en) * 2005-10-19 2009-12-24 Steven W Templeman Boat Stabilizer, Boat Motor and Related Method
US8043135B1 (en) * 2008-04-29 2011-10-25 Sport Marine Technologies, Inc. Assembly and method to attach a device such as a hydrofoil to an anti-ventilation plate
US8312831B2 (en) 2010-06-29 2012-11-20 Marine Dynamics, Inc. Hydrofoil boat stabilizer
US8636553B1 (en) * 2008-04-29 2014-01-28 Sport Marine Technologies, Inc. Assembly and method to attach a device such as a hydrofoil to an anti-ventilation plate
US9120534B1 (en) 2008-04-29 2015-09-01 Sport Marine Technologies, Inc. Assembly and method to attach a device such as a hydrofoil to an antiventilation plate
USD786170S1 (en) 2013-05-17 2017-05-09 Sport Marine Technologies, Inc. Boating accessory

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2551371A (en) * 1949-07-22 1951-05-01 Guy M Grigg Thrust stabilizer for outboard motors

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2551371A (en) * 1949-07-22 1951-05-01 Guy M Grigg Thrust stabilizer for outboard motors

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3075491A (en) * 1961-11-24 1963-01-29 Frank M Hogan Propeller guard for outboard motors
US3149605A (en) * 1962-03-01 1964-09-22 Maremont Corp Outboard propulsion unit steering assist apparatus
US3885516A (en) * 1973-10-04 1975-05-27 Miroslav Uroshevich Propulsion unit for a water-ski towing device
US4487152A (en) * 1974-06-24 1984-12-11 Wilfred Larson Boat stabilizer
JPS5164400U (en) * 1974-11-15 1976-05-20
US4205618A (en) * 1977-01-18 1980-06-03 Olsson Gerhard G R Trimming and stabilizing systems
US4680017A (en) * 1986-03-10 1987-07-14 Eller Dennis E Motorboat propeller guard for improved performance
US4744779A (en) * 1986-12-04 1988-05-17 Ferrero & Wepfer Outboard motor cavitation plate extension
US4832634A (en) * 1987-12-16 1989-05-23 Kearns Alvin L Flow control and protector device for an outboard motor
US4995840A (en) * 1989-08-04 1991-02-26 Hydrofoil International, Inc. Stabilizing fin for a motor boat
US5107786A (en) * 1990-02-09 1992-04-28 Marine Dynamics, Inc. Adjustable boat stabilizer
US4993978A (en) * 1990-03-12 1991-02-19 Johannes John T Boat motor reflector
US5138966A (en) * 1991-02-12 1992-08-18 Attwood Corporation Hydrofoil for marine outboard engine/marine outdrive
US5344346A (en) * 1993-09-07 1994-09-06 Griffin Clarence A Driveshaft housing attachment
US5588390A (en) * 1995-12-22 1996-12-31 French; Leon D. Universal cavitation plate system
US5975969A (en) * 1997-03-21 1999-11-02 Cal-Neva Marine Co. Inc. Hydrofoil propeller guard
US6162104A (en) * 1997-03-21 2000-12-19 White; John Forrest Hydrofoil propeller guard
US6159062A (en) * 1997-04-24 2000-12-12 Taylor, Jr.; Guy High performance boat prop guard
US5848922A (en) * 1997-05-30 1998-12-15 Itima; Romeo Hydrofoil stabilizer for marine motor
US6425787B1 (en) 2000-09-22 2002-07-30 Brian R. Hersom Outboard reflector kit
WO2002057134A1 (en) * 2001-01-18 2002-07-25 Schultz William C Thrust enhancing propeller guard assembly
US6475045B2 (en) * 2001-01-18 2002-11-05 Gregory C. Morrell Thrust enhancing propeller guard assembly
US8206192B2 (en) * 2005-08-22 2012-06-26 Honda Motor Co., Ltd. Boat propulsion engine
US20090149090A1 (en) * 2005-08-22 2009-06-11 Honda Motor Co., Ltd. Boat propulsion engine
US20090314195A1 (en) * 2005-10-19 2009-12-24 Steven W Templeman Boat Stabilizer, Boat Motor and Related Method
US8302549B2 (en) 2005-10-19 2012-11-06 Marine Dynamics, Inc. Boat stabilizer, boat motor and related method
US8043135B1 (en) * 2008-04-29 2011-10-25 Sport Marine Technologies, Inc. Assembly and method to attach a device such as a hydrofoil to an anti-ventilation plate
US8636553B1 (en) * 2008-04-29 2014-01-28 Sport Marine Technologies, Inc. Assembly and method to attach a device such as a hydrofoil to an anti-ventilation plate
US9120534B1 (en) 2008-04-29 2015-09-01 Sport Marine Technologies, Inc. Assembly and method to attach a device such as a hydrofoil to an antiventilation plate
US8312831B2 (en) 2010-06-29 2012-11-20 Marine Dynamics, Inc. Hydrofoil boat stabilizer
USD786170S1 (en) 2013-05-17 2017-05-09 Sport Marine Technologies, Inc. Boating accessory

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