CA1287523C - Aquatic growth cutter - Google Patents
Aquatic growth cutterInfo
- Publication number
- CA1287523C CA1287523C CA000539532A CA539532A CA1287523C CA 1287523 C CA1287523 C CA 1287523C CA 000539532 A CA000539532 A CA 000539532A CA 539532 A CA539532 A CA 539532A CA 1287523 C CA1287523 C CA 1287523C
- Authority
- CA
- Canada
- Prior art keywords
- vessel
- blade
- mounting
- blades
- water
- 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
Links
- 239000000498 cooling water Substances 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims 1
- 241001474374 Blennius Species 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 abstract description 6
- 241000512259 Ascophyllum nodosum Species 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract 1
- 238000013021 overheating Methods 0.000 abstract 1
- 239000013535 sea water Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 101100536354 Drosophila melanogaster tant gene Proteins 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
- F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
Landscapes
- Edible Seaweed (AREA)
Abstract
AQUATIC GROWTH CUTTER
ABSTRACT OF THE DISCLOSURE
An upper and a lower blade are fixed together at an adjustable angle and have means for mounting same on the leading edge of the propeller drive housing of an inboard/outboard motor to cut kelp and other seaweed which would otherwise foul the prop and clog the cool, sea water input vents. The cutter has adjustable brackets which will accommodate a wide variety of different types of propeller drive housings, and will accommodate outboard motors as well as inboard motors, and will even fit on the advance edge a sailboat keel. In one embodiment, it has a combination brace/mesh screen which extends from the cutter to the propeller drive housing in front of the cooling water inlets to keep bits of seaweed and other debris from entering and clogging the cooling system, causing overheating and destruction of the motor.
ABSTRACT OF THE DISCLOSURE
An upper and a lower blade are fixed together at an adjustable angle and have means for mounting same on the leading edge of the propeller drive housing of an inboard/outboard motor to cut kelp and other seaweed which would otherwise foul the prop and clog the cool, sea water input vents. The cutter has adjustable brackets which will accommodate a wide variety of different types of propeller drive housings, and will accommodate outboard motors as well as inboard motors, and will even fit on the advance edge a sailboat keel. In one embodiment, it has a combination brace/mesh screen which extends from the cutter to the propeller drive housing in front of the cooling water inlets to keep bits of seaweed and other debris from entering and clogging the cooling system, causing overheating and destruction of the motor.
Description
87~r3Z'~
AQUATIC GROWTH CUTT~R
BACKG~OUND OF THE INVENTION
-The invention is in the field of marine drive units, and specifically pertains to inboard/outboard drives, although it also has application to outboard motors and sailboats.
The utilization of open, rotating propellers under water engenders the potential problem of fouling the propeller with seaweed such as kelp, fishing lines, and other debris that is increasingly found in the world's oceans. In addition to the problem of wrapping around the propeller, and thus slowing it down, and fouling the drive unit in general, seaweed wrapped around the breathing ports of the propeller drive housing may cut off the cool water circulation which is relied upon by the engine manufacturers to ma1ntain the engine within its range of operating temperatures.
If the operator does not become aware of this blocking or clogging, the mechanism can be severely damaged or even ruined before it becomes apparent that there is a problem.
Otherw1se, the~fou11ng can s]ow down the vessel, and cause the operator to spend a few minutes manually unclogging the propeller and unwinding any coiled seaweed.
Devices have~been created which are directed toward the solution to thae problem. For e2ample, cutting blades are shown in U.S. Patent~ no.~2,~670,728, issued on June 26, 1951, and U.S.
Patent~ no. ~2,~470,87~, issued on June lS, 1946. Although no doubt ` ~
these`devices~would be usefuI in some circumstances, they were desl~gned~part~icu1ar1y for;ootboard motors~before the popularity of~the~inboar;d~/~outboards,~ and they lack the versatility and ,:
-: ~-- -. . - . . . . . . . , .. : . :
a~
mounting that is required to accommodate the variet~ of both inboard and outboard motors, as well as the older outboard. They also do not specifically provide for means to screen out debris which would block or clog the vent holes of the cooling .s7stem.
Additionally, there is a device that operàtes on a different principle known as a Spurs cutter, manufactured by Spurs Marine Manufacturing of Fort Lauderdale, Florida. The Spurs cutter utilizes a stationary cutter with several radial blades, and a rotary cutter which has a scissor like action against the stationary blades to cut seaweed and fishing line, which would wind around and foul the propeller. This apparatus, as others mentioned above, does not address vent clogging. Also, it is specific to the fouling rhat occurs by the winding of seaweed and cord around the propeller, rather than the problem of fouling the propeller drive houslng in general.
There is a need, therefore, for a marine growth cutter which is adaptable to virtually any inboard/outboard motor, or outboard , motor, ànd which protects the entire, or virtually the entire ; immersed~propeller drive housing, and which specifically addresses the problem of the ingress of debris into the cooling :
vents of the drive~housing.
, SUMMARY_OF_THE INVENTION
The lnstant lnvention fulf~ills the above stated needs by~
ùtilizing a pair of cutting blades, an upper blade and a lower - bl~ade,~which are~sd~Justably ~ixed~together at a selected one of an unllmite~d~Ya~r~iet~y~of angles. Both the upper blade and the ~lower`bl~a~de~hav;e mounts which mount on the propeller drive .: ,. . . . .: ' ., j, ' . ' ' ' . :
housing, and both of the mounts are vertically adjustable on their respective blades to accommodate different housings. The mounts straddle portions of the propeller drive housing and at least the upper mount i9 width-wise adjustable to spand the girth of any housing, and mount to opposite sides of the cavitation plate.
In the preferred embodiment, the upper blade mounts a pair of screens which extend in opposite directions to spand the fresh water inlet holes of the cooling system.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a side elevation view illustrating a propeller drive housing in phantom to which the preferred embodiment of the aquatic growth cutter lS mounted;
Figure la i9 a detail of the upper portion of a blade having a straight leading edge rather than a serrated leading edge;
Figure lb lllust~rates a modlfication of the blade in which the leadlng~edge is saw-toothed rather than being serrated or straight; ~
Flgure 2 is~a sectloD taken along line 2-2 of Figure l;
; Figure~3~1s a section~al view taken along line 3-3 of Figure Flgure 4~iS~a~sectlon taken a~long llne 4-4 of Figure l;
Flgurè~5~1s~a~fragma~tic side elevatlon~al view illustrating a modiflcatlon~o~f~th~e~upper~mounting bracket of Figure l;
Fl~gure 6~is a~vlew~sl~ml1ar~to~Figure 5 illustrating another modificatlon~of the~upp~er~mountlng bracket;
~: : :
. .. . :... . . . ......... . . ..
::
:: . . ~ . :: . : :
37~2...3 Figure 7 is a d~tail illustrating a rear cutting blade of Figure 10;
Figures 8 and 9, respectively, are sections taken along lines 8-8 and 9-9 of Figure 10.
DETAILED DESCRIPTION OF THE PREFERR~D EMBODIM~NT
The propeller drive housing 10 extends into the water with a generally streamlined shape, and has a horizontal cavitation plate 12, inlet ports 14 for the cooling system, a gear box hub 16, a propeller 18, and a stabilizing fin or skeg 20.
The aquatic growth cutter of the instant invention includes an upper blade 22 and a lower blade 24, the blades being connected together at selectable angles, such as by ~eans of the nut and bolt 26, which define the pivot joint between the two .
blades through the appropriate bolt holes. The blades have a leading edge which is serrated as indicated at 28, for better cutting action into t~he kelp or seaweed, or whatever debris the device`enc~ounters.~ Alternative cutting edges are shown in Figure la, where a standard straight knife edge is illustrated, and Figure lb, illustrating~a jagged or saw-toothed cutting edge.
Because of the~tear1ng action used by the serrated or saw-toothed edge, ln~addit1on eo~the cu~tting action, these types of blades would las~t longer~between~sharpenings.~;
The~upper~blade~22 is connected to the housing 10 by means of a~mou~nting~clam~p;~30,~seen ln Figure l and even better in Figu;:re 2~ Th~e u~pper mounting~cl~amp 30 of the preferred embod~imè~nt~ s~a~wish~bone-t;ype clamp, having a forward portion 32 Co;mprl;sing;a~pair o~-wl-ted brackets that~twist from the .. : . ~: : . . . . . : ................... . ~ .
- . - . . .: , . . . . .
~ ~S`~ ~,~.3 horizontal forwardly to the vertical and span the upper blade 28, to which it is bolted at 34. As indicated at 36, the upper blade is provided with a series of vertically spaced boltholes so that the clamp 30 is vertically adjustable on the blade.
Centrally of the clamp 30, there is a vertical pivot defined by yet another bolt 35 which passes through the horizontal tabs of the twisted members and through the front ends of the arms 38 of the wishbone which forms the clamp 30. The arms 38 are thus freely adjustable in and out to accommodate the varying thicknesses of the portion 40 of ~he housing just above the "
cavitation plate, with the forward portions of the arms being provided with boltholes so that they can be bolted as at 42 directly to the cavitation plate.
Lower on the upper blade 22, there is mounted a U-shaped filter element 44 which~ spans around both sides of the housing 10 at the level of the inlet ports 14 to prevent materials whîch would otherwlse cl~og the cooling system from ever entering tnese ports. The screen~is reinforced at its upper and lower edges by bow-shaped members;46 so that the screen element doubles as a support for the upper cuttlng blade.
At the~lower end of the unit, the lower blade is provided with a series of selec~table vertical apertures 48 to which the :
lower mounting~bracket 50 is bolted at 52. This element, as shown from~;the top~ln~Flgure 4,~ sctually comprises two separate ; arms 54 which spsn~the;~ske;g 20 and are~bolted to it at 56.
Bec~ause~of~th~e design of the~aguatic growth cutter, it i~s sd]us~table;~to~fit vlrtuallyisny propeller drive housing of any . , . .. , ~ . . .
~;f 3~23 inboard/outboard, or arly outboard motor. It is adjustable not only in the vertical points of attachment by virtue of the selectable bolt holes 36 and 48 of the llpper and lower cutting blades, respectively, but the upper mounting bracket 30 has the expandable arms 38, and the lower mounting bracket 50 has separate, expandable arms 54 to accommodate varying thicknesses of the housing. The cutter is adjustable to accommodate skegs of different rake by virtue of the pivotal connection 26 between the upper and lower blades. Thus, any conceivable configuration of housing can be matched by the invention.
A slight modification is shown in Figure 5, in which the, mountmng clamp 30 is replaced with mounting clamp or bracket 58, which only utilizes two twisted arms 60 to pass from the vertical orientation of the cutting blade to the horizontal extension necessary to~enable it to be bolted to the cavitation plate.
Although the expansion of the individual members 60 would not be as great as the sep~aration that is possi~ble for the arms 38, noneth~eless, a certain amount of varlation would be accommodated.
Yet another means of mounting the upper blade is shown in ~: :
~ Figure 6, in which a yoke 62, much like the lower mounting ::
bracket 50, connects the~ lower blade to the uprigh;t portion of the housing just~above the cavitation plate 12.
Figures~ 7~hr~ough 10 relate to accommodating the cutter to a ~keel-type ss~ilboat lnd]~cated at 64. ~In this embodiment, the rudde;r~66 woul~d~be~ protected from fouling by a blade 68 screwed directly~in;to the~ bottom 70 of the boat. The dual-bladed cutter of~the~ins~tant 1~nvent~lon ls s~wiveled to~match the contour along th. ~er~lcsl ~ A_~ linc be~ween~th-~front of the keel 72 and the ~ z~37~3 front of the boat's bottom. The upyer blades 22 and 24 are mounted to the respective surfaces of the sailboat by means of yokes 74 and 76, respectively, which are screwed, bolted, or otherwise attached to the boat as needed. The yokes as shown in the drawings are connected to the blades by welding.
The utilization of the dual, pivotal blade structure provides a versatile and efective aquatic growth cutter which need not be manufacturer~specific, but can be provided in one, or a small number, of models to fit virtually any kind of inboardjoutboard drive, outboard motors, jet boats, and even with some modification, the leading edge of the keel of a sailboat.
The invention thus being described and illustrated, I hereby claim as fo~llows:
, ::
- : :
~ ~ ,
AQUATIC GROWTH CUTT~R
BACKG~OUND OF THE INVENTION
-The invention is in the field of marine drive units, and specifically pertains to inboard/outboard drives, although it also has application to outboard motors and sailboats.
The utilization of open, rotating propellers under water engenders the potential problem of fouling the propeller with seaweed such as kelp, fishing lines, and other debris that is increasingly found in the world's oceans. In addition to the problem of wrapping around the propeller, and thus slowing it down, and fouling the drive unit in general, seaweed wrapped around the breathing ports of the propeller drive housing may cut off the cool water circulation which is relied upon by the engine manufacturers to ma1ntain the engine within its range of operating temperatures.
If the operator does not become aware of this blocking or clogging, the mechanism can be severely damaged or even ruined before it becomes apparent that there is a problem.
Otherw1se, the~fou11ng can s]ow down the vessel, and cause the operator to spend a few minutes manually unclogging the propeller and unwinding any coiled seaweed.
Devices have~been created which are directed toward the solution to thae problem. For e2ample, cutting blades are shown in U.S. Patent~ no.~2,~670,728, issued on June 26, 1951, and U.S.
Patent~ no. ~2,~470,87~, issued on June lS, 1946. Although no doubt ` ~
these`devices~would be usefuI in some circumstances, they were desl~gned~part~icu1ar1y for;ootboard motors~before the popularity of~the~inboar;d~/~outboards,~ and they lack the versatility and ,:
-: ~-- -. . - . . . . . . . , .. : . :
a~
mounting that is required to accommodate the variet~ of both inboard and outboard motors, as well as the older outboard. They also do not specifically provide for means to screen out debris which would block or clog the vent holes of the cooling .s7stem.
Additionally, there is a device that operàtes on a different principle known as a Spurs cutter, manufactured by Spurs Marine Manufacturing of Fort Lauderdale, Florida. The Spurs cutter utilizes a stationary cutter with several radial blades, and a rotary cutter which has a scissor like action against the stationary blades to cut seaweed and fishing line, which would wind around and foul the propeller. This apparatus, as others mentioned above, does not address vent clogging. Also, it is specific to the fouling rhat occurs by the winding of seaweed and cord around the propeller, rather than the problem of fouling the propeller drive houslng in general.
There is a need, therefore, for a marine growth cutter which is adaptable to virtually any inboard/outboard motor, or outboard , motor, ànd which protects the entire, or virtually the entire ; immersed~propeller drive housing, and which specifically addresses the problem of the ingress of debris into the cooling :
vents of the drive~housing.
, SUMMARY_OF_THE INVENTION
The lnstant lnvention fulf~ills the above stated needs by~
ùtilizing a pair of cutting blades, an upper blade and a lower - bl~ade,~which are~sd~Justably ~ixed~together at a selected one of an unllmite~d~Ya~r~iet~y~of angles. Both the upper blade and the ~lower`bl~a~de~hav;e mounts which mount on the propeller drive .: ,. . . . .: ' ., j, ' . ' ' ' . :
housing, and both of the mounts are vertically adjustable on their respective blades to accommodate different housings. The mounts straddle portions of the propeller drive housing and at least the upper mount i9 width-wise adjustable to spand the girth of any housing, and mount to opposite sides of the cavitation plate.
In the preferred embodiment, the upper blade mounts a pair of screens which extend in opposite directions to spand the fresh water inlet holes of the cooling system.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a side elevation view illustrating a propeller drive housing in phantom to which the preferred embodiment of the aquatic growth cutter lS mounted;
Figure la i9 a detail of the upper portion of a blade having a straight leading edge rather than a serrated leading edge;
Figure lb lllust~rates a modlfication of the blade in which the leadlng~edge is saw-toothed rather than being serrated or straight; ~
Flgure 2 is~a sectloD taken along line 2-2 of Figure l;
; Figure~3~1s a section~al view taken along line 3-3 of Figure Flgure 4~iS~a~sectlon taken a~long llne 4-4 of Figure l;
Flgurè~5~1s~a~fragma~tic side elevatlon~al view illustrating a modiflcatlon~o~f~th~e~upper~mounting bracket of Figure l;
Fl~gure 6~is a~vlew~sl~ml1ar~to~Figure 5 illustrating another modificatlon~of the~upp~er~mountlng bracket;
~: : :
. .. . :... . . . ......... . . ..
::
:: . . ~ . :: . : :
37~2...3 Figure 7 is a d~tail illustrating a rear cutting blade of Figure 10;
Figures 8 and 9, respectively, are sections taken along lines 8-8 and 9-9 of Figure 10.
DETAILED DESCRIPTION OF THE PREFERR~D EMBODIM~NT
The propeller drive housing 10 extends into the water with a generally streamlined shape, and has a horizontal cavitation plate 12, inlet ports 14 for the cooling system, a gear box hub 16, a propeller 18, and a stabilizing fin or skeg 20.
The aquatic growth cutter of the instant invention includes an upper blade 22 and a lower blade 24, the blades being connected together at selectable angles, such as by ~eans of the nut and bolt 26, which define the pivot joint between the two .
blades through the appropriate bolt holes. The blades have a leading edge which is serrated as indicated at 28, for better cutting action into t~he kelp or seaweed, or whatever debris the device`enc~ounters.~ Alternative cutting edges are shown in Figure la, where a standard straight knife edge is illustrated, and Figure lb, illustrating~a jagged or saw-toothed cutting edge.
Because of the~tear1ng action used by the serrated or saw-toothed edge, ln~addit1on eo~the cu~tting action, these types of blades would las~t longer~between~sharpenings.~;
The~upper~blade~22 is connected to the housing 10 by means of a~mou~nting~clam~p;~30,~seen ln Figure l and even better in Figu;:re 2~ Th~e u~pper mounting~cl~amp 30 of the preferred embod~imè~nt~ s~a~wish~bone-t;ype clamp, having a forward portion 32 Co;mprl;sing;a~pair o~-wl-ted brackets that~twist from the .. : . ~: : . . . . . : ................... . ~ .
- . - . . .: , . . . . .
~ ~S`~ ~,~.3 horizontal forwardly to the vertical and span the upper blade 28, to which it is bolted at 34. As indicated at 36, the upper blade is provided with a series of vertically spaced boltholes so that the clamp 30 is vertically adjustable on the blade.
Centrally of the clamp 30, there is a vertical pivot defined by yet another bolt 35 which passes through the horizontal tabs of the twisted members and through the front ends of the arms 38 of the wishbone which forms the clamp 30. The arms 38 are thus freely adjustable in and out to accommodate the varying thicknesses of the portion 40 of ~he housing just above the "
cavitation plate, with the forward portions of the arms being provided with boltholes so that they can be bolted as at 42 directly to the cavitation plate.
Lower on the upper blade 22, there is mounted a U-shaped filter element 44 which~ spans around both sides of the housing 10 at the level of the inlet ports 14 to prevent materials whîch would otherwlse cl~og the cooling system from ever entering tnese ports. The screen~is reinforced at its upper and lower edges by bow-shaped members;46 so that the screen element doubles as a support for the upper cuttlng blade.
At the~lower end of the unit, the lower blade is provided with a series of selec~table vertical apertures 48 to which the :
lower mounting~bracket 50 is bolted at 52. This element, as shown from~;the top~ln~Flgure 4,~ sctually comprises two separate ; arms 54 which spsn~the;~ske;g 20 and are~bolted to it at 56.
Bec~ause~of~th~e design of the~aguatic growth cutter, it i~s sd]us~table;~to~fit vlrtuallyisny propeller drive housing of any . , . .. , ~ . . .
~;f 3~23 inboard/outboard, or arly outboard motor. It is adjustable not only in the vertical points of attachment by virtue of the selectable bolt holes 36 and 48 of the llpper and lower cutting blades, respectively, but the upper mounting bracket 30 has the expandable arms 38, and the lower mounting bracket 50 has separate, expandable arms 54 to accommodate varying thicknesses of the housing. The cutter is adjustable to accommodate skegs of different rake by virtue of the pivotal connection 26 between the upper and lower blades. Thus, any conceivable configuration of housing can be matched by the invention.
A slight modification is shown in Figure 5, in which the, mountmng clamp 30 is replaced with mounting clamp or bracket 58, which only utilizes two twisted arms 60 to pass from the vertical orientation of the cutting blade to the horizontal extension necessary to~enable it to be bolted to the cavitation plate.
Although the expansion of the individual members 60 would not be as great as the sep~aration that is possi~ble for the arms 38, noneth~eless, a certain amount of varlation would be accommodated.
Yet another means of mounting the upper blade is shown in ~: :
~ Figure 6, in which a yoke 62, much like the lower mounting ::
bracket 50, connects the~ lower blade to the uprigh;t portion of the housing just~above the cavitation plate 12.
Figures~ 7~hr~ough 10 relate to accommodating the cutter to a ~keel-type ss~ilboat lnd]~cated at 64. ~In this embodiment, the rudde;r~66 woul~d~be~ protected from fouling by a blade 68 screwed directly~in;to the~ bottom 70 of the boat. The dual-bladed cutter of~the~ins~tant 1~nvent~lon ls s~wiveled to~match the contour along th. ~er~lcsl ~ A_~ linc be~ween~th-~front of the keel 72 and the ~ z~37~3 front of the boat's bottom. The upyer blades 22 and 24 are mounted to the respective surfaces of the sailboat by means of yokes 74 and 76, respectively, which are screwed, bolted, or otherwise attached to the boat as needed. The yokes as shown in the drawings are connected to the blades by welding.
The utilization of the dual, pivotal blade structure provides a versatile and efective aquatic growth cutter which need not be manufacturer~specific, but can be provided in one, or a small number, of models to fit virtually any kind of inboardjoutboard drive, outboard motors, jet boats, and even with some modification, the leading edge of the keel of a sailboat.
The invention thus being described and illustrated, I hereby claim as fo~llows:
, ::
- : :
~ ~ ,
Claims (8)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An aquatic growth cutter for a submerged, water-parting portion of a vessel comprising:
(a) an upper blade having a sharp leading edge;
(b) a lower blade having a sharp leading edge and rigidly depending from said upper blade at a fixed, wide oblique angle thereto;
(c) upper mounting means mounting said upper blade to said vessel;
(d) lower mounting means mounting said lower blade to said vessel, said upper and lower mounting means mounting said blades such that said blades are substantially in advance of said water-parting portion of a vessel to cut aquatic growth as said vessel moves through the water; and (e) said upper blade and lower blade being adjustably pivotally fastened together to be releasable from their fixed relation with one another to pivot in the same plane and including means to fix same together, after being released and adjusted, at a selected angle.
(a) an upper blade having a sharp leading edge;
(b) a lower blade having a sharp leading edge and rigidly depending from said upper blade at a fixed, wide oblique angle thereto;
(c) upper mounting means mounting said upper blade to said vessel;
(d) lower mounting means mounting said lower blade to said vessel, said upper and lower mounting means mounting said blades such that said blades are substantially in advance of said water-parting portion of a vessel to cut aquatic growth as said vessel moves through the water; and (e) said upper blade and lower blade being adjustably pivotally fastened together to be releasable from their fixed relation with one another to pivot in the same plane and including means to fix same together, after being released and adjusted, at a selected angle.
2. An aquatic growth cutter for a submerged, water-parting portion of a vessel comprising:
(a) an upper blade having a share leading edge;
(b) a lower blade having a sharp leading edge and rigidly depending from said upper blade at a fixed, wide oblique angle thereto;
(c) upper mounting means mounting said upper blade to said vessel;
(d) lower mounting means mounting said lower blade to said vessel, said upper and lower mounting means mounting said blades such that said blade are substantially in advance of said water-parting portion of a vessel to cut aquatic growth as said vessel moves through the water; and (e) said blades being vertically oriented and at least one of said mounting means having a vertically adjustable means of attachment foe fastening the mounting means to a respective one of said blades.
(a) an upper blade having a share leading edge;
(b) a lower blade having a sharp leading edge and rigidly depending from said upper blade at a fixed, wide oblique angle thereto;
(c) upper mounting means mounting said upper blade to said vessel;
(d) lower mounting means mounting said lower blade to said vessel, said upper and lower mounting means mounting said blades such that said blade are substantially in advance of said water-parting portion of a vessel to cut aquatic growth as said vessel moves through the water; and (e) said blades being vertically oriented and at least one of said mounting means having a vertically adjustable means of attachment foe fastening the mounting means to a respective one of said blades.
3. An aquatic growth cutter for mounting on a propeller drive housing having a cavitation plate, said cutter comprising:
(a) an upper blade having a sharp leading edge;
(b) a lower blade having a sharp leading edge and depending from said upper blade;
(c) upper mounting means mounting said upper blade to said housing; and (d) lower mounting means mounting said lower blade to said housing, said upper and lower mounting means mounting said blades such that same are substantially in advance of said water-parting portion of said housing to cut aquatic growth as said housing moves through the water;
(e) said upper blade and lower blade being pivotally fastened together to pivot in the same plane and including means to fix same together at a selected angle;
(f) said blades each being elongated to define elongated leading edges with said edges being scalloped;
(g) said blades being vertically oriented and at least one of said mounting means having vertically adjustable means of attachment for fastening said mounting means to a respective one of said blades;
(h) said blades being pivotal in a vertical plane and said upper mounting means comprising a wishbone bracket with arms that pivot in a horizontal plane, said arms having vertical holes for mounting same to the cavitation plate of the propeller drive housing.
(a) an upper blade having a sharp leading edge;
(b) a lower blade having a sharp leading edge and depending from said upper blade;
(c) upper mounting means mounting said upper blade to said housing; and (d) lower mounting means mounting said lower blade to said housing, said upper and lower mounting means mounting said blades such that same are substantially in advance of said water-parting portion of said housing to cut aquatic growth as said housing moves through the water;
(e) said upper blade and lower blade being pivotally fastened together to pivot in the same plane and including means to fix same together at a selected angle;
(f) said blades each being elongated to define elongated leading edges with said edges being scalloped;
(g) said blades being vertically oriented and at least one of said mounting means having vertically adjustable means of attachment for fastening said mounting means to a respective one of said blades;
(h) said blades being pivotal in a vertical plane and said upper mounting means comprising a wishbone bracket with arms that pivot in a horizontal plane, said arms having vertical holes for mounting same to the cavitation plate of the propeller drive housing.
4. Structure according to claim 3 wherein said propeller drive housing has a downwardly extended skeg and said lower mounting means is a bracket comprising a pair of arms straddling between said lower blade and the skeg of a propeller shaft housing to which they can be bolted.
S. An aquatic growth cutter for a submerged, water-parting portion of a vessel comprising:
(a) an upper blade having a sharp leading edge;
(b) a lower blade having a sharp leading edge and depending from said upper blade;
(c) upper mounting means mounting said upper blade to said vessel; and (d) lower mounting means mounting said lower blade to said vessel, said upper and lower mounting means mounting said blades such that said blades are substantially in advance of said water-parting portion of a vessel to cut aquatic growth as said vessel moves through the water; and (e) said water-parting portion of a vessel comprises the leading edge of a propeller housing having a cooling water intake port, said aquatic growth cutter including screen means overlying said intake port to prevent same from being clogged with water-borne debris.
(a) an upper blade having a sharp leading edge;
(b) a lower blade having a sharp leading edge and depending from said upper blade;
(c) upper mounting means mounting said upper blade to said vessel; and (d) lower mounting means mounting said lower blade to said vessel, said upper and lower mounting means mounting said blades such that said blades are substantially in advance of said water-parting portion of a vessel to cut aquatic growth as said vessel moves through the water; and (e) said water-parting portion of a vessel comprises the leading edge of a propeller housing having a cooling water intake port, said aquatic growth cutter including screen means overlying said intake port to prevent same from being clogged with water-borne debris.
6. The apparatus of claim 5 wherein said screen means extends rearwardly from one of said blades and rests on both sides of the propeller housing to provide positional support for said blades as well as screening said intake port.
7. An aquatic growth cutter for a submerged, water-parting portion of a vessel comprising:
(a) an upper blade having a sharp leading edge;
(b) a lower blade having a sharp leading edge and depending from said upper blade;
(c) upper mounting means mounting said upper blade to said vessel; and (d) lower mounting means mounting said lower blade to said vessel, said upper and lower mounting means mounting said blades such that same are substantially in advance of said water-parting portion of a vessel to cut aquatic growth as said vessel moves through the water; and (e) said upper blade and lower blade being pivotally fastened together to pivot in the same plane and including means to fix same together at a selected angle;
(f) said blades being so fastened together to permit them to adjustably pivot into an orientation in which said leading edges define together an angle alternatively and selectably greater or lesser than 180 degrees, said mounting means being adapted to mount said blades to the leading edge of the keel of a sailboat, and the portion of the bottom of the sailboat adjacent the leading edge of the keel.
(a) an upper blade having a sharp leading edge;
(b) a lower blade having a sharp leading edge and depending from said upper blade;
(c) upper mounting means mounting said upper blade to said vessel; and (d) lower mounting means mounting said lower blade to said vessel, said upper and lower mounting means mounting said blades such that same are substantially in advance of said water-parting portion of a vessel to cut aquatic growth as said vessel moves through the water; and (e) said upper blade and lower blade being pivotally fastened together to pivot in the same plane and including means to fix same together at a selected angle;
(f) said blades being so fastened together to permit them to adjustably pivot into an orientation in which said leading edges define together an angle alternatively and selectably greater or lesser than 180 degrees, said mounting means being adapted to mount said blades to the leading edge of the keel of a sailboat, and the portion of the bottom of the sailboat adjacent the leading edge of the keel.
8. An aquatic growth cutter for a submerged, water parting portion of a vessel comprising:
(a) an upper blade having a sharp leading edge;
(b) a lower blade having a sharp leading edge and depending from said upper blade;
(c) upper mounting means mounting said upper blade to said vessel; and (d) lower mounting means mounting said lower blade to said vessel, said upper and lower mounting means mounting said blades such that same are substantially in advance of said water-parting portion of a vessel to cut aquatic growth as said vessel moves through the water; and (e) said mounting means being both vertically adjustably connected to the respective blades and said blades being pivotally connected to permit their mutual pivoting in a vertical plane, whereby said aquatic growth cutter is multiply adjustable to permit its mounting to a variety of propeller housings of inboard/outboard and outboard motors.
(a) an upper blade having a sharp leading edge;
(b) a lower blade having a sharp leading edge and depending from said upper blade;
(c) upper mounting means mounting said upper blade to said vessel; and (d) lower mounting means mounting said lower blade to said vessel, said upper and lower mounting means mounting said blades such that same are substantially in advance of said water-parting portion of a vessel to cut aquatic growth as said vessel moves through the water; and (e) said mounting means being both vertically adjustably connected to the respective blades and said blades being pivotally connected to permit their mutual pivoting in a vertical plane, whereby said aquatic growth cutter is multiply adjustable to permit its mounting to a variety of propeller housings of inboard/outboard and outboard motors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000539532A CA1287523C (en) | 1987-06-12 | 1987-06-12 | Aquatic growth cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000539532A CA1287523C (en) | 1987-06-12 | 1987-06-12 | Aquatic growth cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1287523C true CA1287523C (en) | 1991-08-13 |
Family
ID=4135881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000539532A Expired - Lifetime CA1287523C (en) | 1987-06-12 | 1987-06-12 | Aquatic growth cutter |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1287523C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108528670A (en) * | 2018-05-23 | 2018-09-14 | 陈大海 | A kind of screw propeller anti-wrapping winding apparatus and its garbage collection system |
| CN115158622A (en) * | 2022-06-15 | 2022-10-11 | 中国船舶重工集团公司第七一九研究所 | Integrated motor propulsion unit suitable for complex water area |
-
1987
- 1987-06-12 CA CA000539532A patent/CA1287523C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108528670A (en) * | 2018-05-23 | 2018-09-14 | 陈大海 | A kind of screw propeller anti-wrapping winding apparatus and its garbage collection system |
| CN115158622A (en) * | 2022-06-15 | 2022-10-11 | 中国船舶重工集团公司第七一九研究所 | Integrated motor propulsion unit suitable for complex water area |
| CN115158622B (en) * | 2022-06-15 | 2023-05-23 | 中国船舶重工集团公司第七一九研究所 | Integrated motor propulsion device suitable for complex water area |
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| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |