CA1076369A - Aquatic weed control machine - Google Patents
Aquatic weed control machineInfo
- Publication number
- CA1076369A CA1076369A CA284,487A CA284487A CA1076369A CA 1076369 A CA1076369 A CA 1076369A CA 284487 A CA284487 A CA 284487A CA 1076369 A CA1076369 A CA 1076369A
- Authority
- CA
- Canada
- Prior art keywords
- machine
- unit
- set forth
- bottom unit
- removing weeds
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D44/00—Harvesting of underwater plants, e.g. harvesting of seaweed
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Environmental Sciences (AREA)
- Catching Or Destruction (AREA)
- Harvesting Machines For Specific Crops (AREA)
Abstract
"AQUATIC WEED CONTROL MACHINE"
ABSTRACT OF THE DISCLOSURE
Aquatic plant control is controlled by a machine consisting of a floating surface unit, a powered bottom unit and a connecting unit interconnecting the surface and bottom units. The bottom unit is provided with a weed cutting attach-ment which operates slightly below the bottom surface of the lake. Cutting is accomplished by a lateral, as well as, a forward motion of the cutting system.
ABSTRACT OF THE DISCLOSURE
Aquatic plant control is controlled by a machine consisting of a floating surface unit, a powered bottom unit and a connecting unit interconnecting the surface and bottom units. The bottom unit is provided with a weed cutting attach-ment which operates slightly below the bottom surface of the lake. Cutting is accomplished by a lateral, as well as, a forward motion of the cutting system.
Description
`` ~L1~76~6~
This invention relates to machines used in the control of aquatic nuisance weeds in general and myriophyllum Spicatum L. in particular.
Aquatic weeds have become widespread in many areas of the world in both fresh and brackish waters~ Numerous co~trol methods have been suggested and implemen~ed including the use of chemical herbicides, animal pathogens, introduced diseases, and mechanical harvesting ox removal equipment.
The mechanical equipment presently used is primarily barge or boat-mounted, designed to operate in shallow weed beds. The mechanical harvesting devices are cutters or other n~achines such as rototillers which are suspended from the barge.
This sytem, although partially effective in some types of weed beds, is totally ineffective in controlling the Myriophyllum spicatum L. species. This is due to the rapid regrowth of the weed, the propagation of the weed from cuttings, and the depth at which the weed will grow. Also, it is evident that existing equipment, mounted on barges, for example, the "Aquamarine"
harvester, is inadequate due to: the slow rate of weed removal, inability to maintain a consistent cutting pattern, inability to sever the plant at optimum location (that is, the roots), and the requirement for fencing off the harves-ting area to prevent the spread of fragments.
It is the object of the invention to disclose and provide a mechanical system which will overcome the above noted deficiencies: that is, a system which can remove aquatic weeds in water depths of up to 22 feet, which can remove the weeds at rates of greater than half an acre per hour, that can be easily manoeuvered in the weed beds, that minimizes missed areas in harvesting, that achieves removal of the plant down to the root, and that minimizes fragmentation of the weeds. It is a ~763~9 further object of the ;nvent;on to prov;de a system wh;ch can perform a number of tasks ;n d;fferent aquat;c environments.
Broadly stated, the inventi:on i:s a machine for u~e in mechanically controlling aquatic plants, comprising a floating surface unit; a powered bottom uni:t; means mounted on the bottom unit for removing weeds; and means interconnecti.ng the surface and bottom units, for lifting and loweri.ng the bottom unit relati:ve to the sur~ace unit to vary the proportion of the weight of the machine carried by the bottom unit and thus vary the load on the bottom un;t.
These and other objects and advanta~es. of the machi:ne of the present i.nvention will hecome apparent to tfiose ski:lled in the art from consideration of the followi.ng detai:led descri;ption of the preferred embodinlent thereof. Reference wi`ll b.e made to the appended drawings in which:
Fi~gure 1 i;s a side elevatiQn vi:ew of the exemplary embodiment of the weed control system i`n operation.
Figure 2 i.s a front ele.vati.on ~i:ew of the exemplary embodiment of the system i.n operation.
Figure 3 is a front elevation vi:ew of the exemplary embodi.ment of the system in trans:portation configuration.
Figure 4 i.s a cutaway s:ide view of the system of Fi.gure 2 along plane 4 - 4, showing the bottom tracking uni:t.
Figure 5 is a cutaway side view of the sys.tem of Figure 2 along plane.5 - 5 showing the adjustable depth me.chanism.
Figure 6 i.s a view of an alte.rnate embodi.ment.
Figure 7 is a view Qf another alternate emkodiment.
Referring now to Fi:gure 1 whi`ch i`s a preferred embodi:ment of the invention, it will be seen there i:s shown a water sur~ace 7, a lake bottom 8, an aquatic ~eed 5, the aquatic weed root system, and the aquatic weed harvester generally described as #1 the surface uni:t floati.ng on the water s.urface 7, the ~ubsurface uni:t 2, travelli:ng on the lake b.ottom 8, and a depth control section 3, which ties the surface unit 1, and the bottom unit 2, together. Also .
~763~
in Figure 1 is shown a conveyor system 9, driven by a motor 10, wh;ch leads to a floating barge 4, which is to~ed by surface unit 1.
Surface unit 1, is equi.pped ~ith a hydraulic power unit 22, operated by operator 23. Po~er from the power unit 22, ;s transferred to the subsurface unit 2, by means of hydraulic li.nes 29 to power the hydraul;.c motors on the subsurface uni.t Wi`th hydraulic flui~d under hi:gh pressure.
Po~er is transmitted to the drive system for conveyor ~, by means of hy-draul;c l;nes 28, wh;ch dr;.ve conveyor dr;:ve motor 10.
Wi.th reference to Fi.gure 2, the surface uni.t 1, i:s seen to be composed of hulls, 24 and 25, joined together by a platform type of sys.tem 30. Also sho~n in Figure 2 are th.e components of subsurface unit 2, consist;ng of tracked un;.ts, 42 and 41, jo;:ned together by structure, 45. Structure 45 als.o s.upports cutting uni:t 11. Attached to cutting unit 11 are guide members 38 whi.ch guide the cut weeds onto conve~or 9.
Referri.ng to F;gure 3, ;.t can be seen that ;:n the collapsed position, subs.urface unit 2 and depth control section 3 fold ;nto a space formed het~een hulls 24 and 25 of surface uni`t 1. The complete s~stem i.n its collapsed form can then be transported an truck-trai`ler uni.t 100.
2Q As ~i.ll be di:sclos.ed herei:nafter, th.e depth control se.ct;on 3 i.nterconnecti.ng the s:urface and bottom units 1 and 2 i:5 functi:onal to lift and lower the bottom uni.t 2 relative to the surface uni:t 1 and to maintai.n a desi.red load on the bottom unit 2.
Referri.ng to Fi:gure 4, it is. seen that track unit 41 carried by structure 45 i:s pi.voted wi`th re~pect to support structure 3 at 30. This p;votal i.nterconnection 30 permits longi:tudi:nal pi`votal movement of the hottom unit 2 i.ndependent of the surface unit. Thus the bottom unit
This invention relates to machines used in the control of aquatic nuisance weeds in general and myriophyllum Spicatum L. in particular.
Aquatic weeds have become widespread in many areas of the world in both fresh and brackish waters~ Numerous co~trol methods have been suggested and implemen~ed including the use of chemical herbicides, animal pathogens, introduced diseases, and mechanical harvesting ox removal equipment.
The mechanical equipment presently used is primarily barge or boat-mounted, designed to operate in shallow weed beds. The mechanical harvesting devices are cutters or other n~achines such as rototillers which are suspended from the barge.
This sytem, although partially effective in some types of weed beds, is totally ineffective in controlling the Myriophyllum spicatum L. species. This is due to the rapid regrowth of the weed, the propagation of the weed from cuttings, and the depth at which the weed will grow. Also, it is evident that existing equipment, mounted on barges, for example, the "Aquamarine"
harvester, is inadequate due to: the slow rate of weed removal, inability to maintain a consistent cutting pattern, inability to sever the plant at optimum location (that is, the roots), and the requirement for fencing off the harves-ting area to prevent the spread of fragments.
It is the object of the invention to disclose and provide a mechanical system which will overcome the above noted deficiencies: that is, a system which can remove aquatic weeds in water depths of up to 22 feet, which can remove the weeds at rates of greater than half an acre per hour, that can be easily manoeuvered in the weed beds, that minimizes missed areas in harvesting, that achieves removal of the plant down to the root, and that minimizes fragmentation of the weeds. It is a ~763~9 further object of the ;nvent;on to prov;de a system wh;ch can perform a number of tasks ;n d;fferent aquat;c environments.
Broadly stated, the inventi:on i:s a machine for u~e in mechanically controlling aquatic plants, comprising a floating surface unit; a powered bottom uni:t; means mounted on the bottom unit for removing weeds; and means interconnecti.ng the surface and bottom units, for lifting and loweri.ng the bottom unit relati:ve to the sur~ace unit to vary the proportion of the weight of the machine carried by the bottom unit and thus vary the load on the bottom un;t.
These and other objects and advanta~es. of the machi:ne of the present i.nvention will hecome apparent to tfiose ski:lled in the art from consideration of the followi.ng detai:led descri;ption of the preferred embodinlent thereof. Reference wi`ll b.e made to the appended drawings in which:
Fi~gure 1 i;s a side elevatiQn vi:ew of the exemplary embodiment of the weed control system i`n operation.
Figure 2 i.s a front ele.vati.on ~i:ew of the exemplary embodiment of the system i.n operation.
Figure 3 is a front elevation vi:ew of the exemplary embodi.ment of the system in trans:portation configuration.
Figure 4 i.s a cutaway s:ide view of the system of Fi.gure 2 along plane 4 - 4, showing the bottom tracking uni:t.
Figure 5 is a cutaway side view of the sys.tem of Figure 2 along plane.5 - 5 showing the adjustable depth me.chanism.
Figure 6 i.s a view of an alte.rnate embodi.ment.
Figure 7 is a view Qf another alternate emkodiment.
Referring now to Fi:gure 1 whi`ch i`s a preferred embodi:ment of the invention, it will be seen there i:s shown a water sur~ace 7, a lake bottom 8, an aquatic ~eed 5, the aquatic weed root system, and the aquatic weed harvester generally described as #1 the surface uni:t floati.ng on the water s.urface 7, the ~ubsurface uni:t 2, travelli:ng on the lake b.ottom 8, and a depth control section 3, which ties the surface unit 1, and the bottom unit 2, together. Also .
~763~
in Figure 1 is shown a conveyor system 9, driven by a motor 10, wh;ch leads to a floating barge 4, which is to~ed by surface unit 1.
Surface unit 1, is equi.pped ~ith a hydraulic power unit 22, operated by operator 23. Po~er from the power unit 22, ;s transferred to the subsurface unit 2, by means of hydraulic li.nes 29 to power the hydraul;.c motors on the subsurface uni.t Wi`th hydraulic flui~d under hi:gh pressure.
Po~er is transmitted to the drive system for conveyor ~, by means of hy-draul;c l;nes 28, wh;ch dr;.ve conveyor dr;:ve motor 10.
Wi.th reference to Fi.gure 2, the surface uni.t 1, i:s seen to be composed of hulls, 24 and 25, joined together by a platform type of sys.tem 30. Also sho~n in Figure 2 are th.e components of subsurface unit 2, consist;ng of tracked un;.ts, 42 and 41, jo;:ned together by structure, 45. Structure 45 als.o s.upports cutting uni:t 11. Attached to cutting unit 11 are guide members 38 whi.ch guide the cut weeds onto conve~or 9.
Referri.ng to F;gure 3, ;.t can be seen that ;:n the collapsed position, subs.urface unit 2 and depth control section 3 fold ;nto a space formed het~een hulls 24 and 25 of surface uni`t 1. The complete s~stem i.n its collapsed form can then be transported an truck-trai`ler uni.t 100.
2Q As ~i.ll be di:sclos.ed herei:nafter, th.e depth control se.ct;on 3 i.nterconnecti.ng the s:urface and bottom units 1 and 2 i:5 functi:onal to lift and lower the bottom uni.t 2 relative to the surface uni:t 1 and to maintai.n a desi.red load on the bottom unit 2.
Referri.ng to Fi:gure 4, it is. seen that track unit 41 carried by structure 45 i:s pi.voted wi`th re~pect to support structure 3 at 30. This p;votal i.nterconnection 30 permits longi:tudi:nal pi`votal movement of the hottom unit 2 i.ndependent of the surface unit. Thus the bottom unit
2 can pivot as i.t travels over an uneven lake bottom wi:thout ti.pping the surface uni.t 1. While permi.tting thi`s pi.votal movement, the pivotal 3Q- CQnneCtiOn 30 als:o allows Yerti:cal load to b.e transferred to the bottom unit 2. It is also shown that tracks 47 are carried on a s.eries of wh.eels _ 3 _ .~ ~
~ ~ .
~76369 48 which are rotationally attached to structure 45. One such wheel is driven by hydraulic motor 49. The cutting attachment system 11 is pi~oted around frame structure component 74. The structural member 73 which carries wedgeshaped cutters 77 and pivots around point 74 is actuated by hydraulic cylinder 71 to adjust the position of cutters 77.
Cutters 77 are oscillated laterally by hydraulic motor 78 fitted with eccentric cam 79. Wedge cutters are well known in mowing equipment.
~p~ - 3a -~ ;3~;9 Referring to Figure 5, it is. shown the depth control system
~ ~ .
~76369 48 which are rotationally attached to structure 45. One such wheel is driven by hydraulic motor 49. The cutting attachment system 11 is pi~oted around frame structure component 74. The structural member 73 which carries wedgeshaped cutters 77 and pivots around point 74 is actuated by hydraulic cylinder 71 to adjust the position of cutters 77.
Cutters 77 are oscillated laterally by hydraulic motor 78 fitted with eccentric cam 79. Wedge cutters are well known in mowing equipment.
~p~ - 3a -~ ;3~;9 Referring to Figure 5, it is. shown the depth control system
3 which connects surface unit 1 with subsurface 2. The system 3 consists of members 32 and 33 wl~ich are pin-connected at po;nts 31 to allow sc;ssor-l;ke act;on to occur. The scissor action is actuated by hydraulic cylinders 34 ~hich are fixed at point 35. Cylinders 34 are powered by hydraulic lines 37 which are fed from power unit 22. -`
Another embodiment of the cutt;ng device 11 is shown in Figure 6 where;n p;votal member 73 ;s pivoted around poi:nt 74 being actuated by hydrauli.c cylinder 71. On member 73 i:s mounted a drum-like attachment 110 fitted with withdrawing fi.ngers 111. Such ~i:thdrawi:ng fingers are known ;n the art of rotot;lling, for example see U.S. Patent 2,599,~45 to Kramer. Rotat;onal direction is. sh.own by the arro~. Drum member 110 is driven b~ hydrauli.c motor 112 in the di.recti.on shown.
Another embodi.ment of th.e cutting system 11 is shown in Figure 7 wherein pivotal member 73 pivots around point 74 being actuated by hydraul;c cylinder 71. Memher 73 carries a mani:fold system 120 which feeds nozzles 121. Manifold system 12a i`s suppli:ed wi.th hi:gh pressure fluid by means of p;pi.ng 123. Th.i.s pi:pi:ng system i:s fed hy a s.eparate high pressure pump whi.ch i.s mounted on surface unit 1 and connected to 20. man;fold 120 b~ hoses.123. The h;gh. press:ure flu;:d i:s fed through nozzles.121 generati:ng flui.d jets 122. `
In operation, the s.urface uni:t 1 and su~surface unit 2 are closely connected by connecti`ng means 3. When attac~i.ng a weed bed as shown i:n Figure 1, surface unit 1 tows a perforated barge unit 4 with driv;ng power heing supplied b.y subsurface unlt 2.
The driving energy for unit 2 comes from power unit 22 mounted on ~ur-face unit 1. Power uni:t 22 is a sui:tahle pri.me mover dr;:v;ng a hydraulic pump, sai:d pump s.upplying hydrauli:c power to drive uni:ts 49 on suhsurface tracked units 41 and 42. The necess:ary tracti`on for subs;urface uni.t 2 comes ~ .
~7~3~i9 from the weight of unit 2 plus the extra weight supplied by operating hydraulic rams 3~ which function to activate the scissor-like motion of connecting unit 3. If less traction or less weight is required on subsurface unit 2, hydraulic rams 34 are extended to allow more of the weight of surface unit 1 to be carried by the water. If more traction is xequired on subsurface unit 2, wei~ht is added ~y retractin~ rams 34 to effectivel~ lift surface unit 1 hi~her out of the water thus transferrin~ more load to subsurface unit 2.
As subsurface unit 2 travels forward carrying sur-face unit 1 and bar~e forward, cutting attachment 11 which oper-ates slightly below the bottom surface oE the lake, oscillates laterally cuttin~ the root system 6 of plants 5. ~s subsurface unit 2 moves forward, the cut weeds 5 with attached root systems lS are picked up by perforated conveyor 9 and transported to barge 4.
Cutting of the root system 6 is accomplished by a lateral as well as forward motion of cutting system 11.
Turning of subsurface system 2 and conse~uently surface system 1 is accomplished by means of hydraulic motors 49 ~ on tracked systems 41 and 42~ By increasing the speed of either track system 41 or 42, a turning motion is effected similar to that of a caterpillar type tractor. Power unit 22 and variable speed hydraulic motors ~9 are coupled to provide variable forward speed ability of subsurface unit 2.
For transportation purposes, subsurface unit 2 is nested into the bottom of surface unit 1 as shown in Fi~ure 3.
This provides for a compact system to be moved forward onto a truck-trailer system for movement from one site to another.
Also provided on surface unit 1 is a separate power source 130 which could be an outboard motor to allow for movement of the nested system from one portion of a lake to another.
.. . . .. . .
~7~3~9 Other embodiments of the device or system can be envisaged using weed cutting systems other than the later-ally oscillatin~ system shown in the preferred embodiment.
Figure 6 d~scribes a rototilling type of system consisting of a drum fitted with retractable fingers or tines 111 which are driven by the power unit 22. The rototilling system tends to remove roots and weeds which are then picked up on conveyor 9 and transported to barge 4.
Another embodiment envisaged is shown in Figure 7 wherein high pressure water jets being expelled from a manifold, 120, are used to dislodge root bundles and low growing weeds.
sai~ root bundles and weeds are then transported by means of per~orated conveyor 9 into barge 4.
Having thus described a preferred embodiment of the weed harvesting system according to the present in-vention, it is understood that various alterations, modifi-cations and adaptations to the system may be made within the scope of the present invention which is de~ined and limited only by the following claims.
Another embodiment of the cutt;ng device 11 is shown in Figure 6 where;n p;votal member 73 ;s pivoted around poi:nt 74 being actuated by hydrauli.c cylinder 71. On member 73 i:s mounted a drum-like attachment 110 fitted with withdrawing fi.ngers 111. Such ~i:thdrawi:ng fingers are known ;n the art of rotot;lling, for example see U.S. Patent 2,599,~45 to Kramer. Rotat;onal direction is. sh.own by the arro~. Drum member 110 is driven b~ hydrauli.c motor 112 in the di.recti.on shown.
Another embodi.ment of th.e cutting system 11 is shown in Figure 7 wherein pivotal member 73 pivots around point 74 being actuated by hydraul;c cylinder 71. Memher 73 carries a mani:fold system 120 which feeds nozzles 121. Manifold system 12a i`s suppli:ed wi.th hi:gh pressure fluid by means of p;pi.ng 123. Th.i.s pi:pi:ng system i:s fed hy a s.eparate high pressure pump whi.ch i.s mounted on surface unit 1 and connected to 20. man;fold 120 b~ hoses.123. The h;gh. press:ure flu;:d i:s fed through nozzles.121 generati:ng flui.d jets 122. `
In operation, the s.urface uni:t 1 and su~surface unit 2 are closely connected by connecti`ng means 3. When attac~i.ng a weed bed as shown i:n Figure 1, surface unit 1 tows a perforated barge unit 4 with driv;ng power heing supplied b.y subsurface unlt 2.
The driving energy for unit 2 comes from power unit 22 mounted on ~ur-face unit 1. Power uni:t 22 is a sui:tahle pri.me mover dr;:v;ng a hydraulic pump, sai:d pump s.upplying hydrauli:c power to drive uni:ts 49 on suhsurface tracked units 41 and 42. The necess:ary tracti`on for subs;urface uni.t 2 comes ~ .
~7~3~i9 from the weight of unit 2 plus the extra weight supplied by operating hydraulic rams 3~ which function to activate the scissor-like motion of connecting unit 3. If less traction or less weight is required on subsurface unit 2, hydraulic rams 34 are extended to allow more of the weight of surface unit 1 to be carried by the water. If more traction is xequired on subsurface unit 2, wei~ht is added ~y retractin~ rams 34 to effectivel~ lift surface unit 1 hi~her out of the water thus transferrin~ more load to subsurface unit 2.
As subsurface unit 2 travels forward carrying sur-face unit 1 and bar~e forward, cutting attachment 11 which oper-ates slightly below the bottom surface oE the lake, oscillates laterally cuttin~ the root system 6 of plants 5. ~s subsurface unit 2 moves forward, the cut weeds 5 with attached root systems lS are picked up by perforated conveyor 9 and transported to barge 4.
Cutting of the root system 6 is accomplished by a lateral as well as forward motion of cutting system 11.
Turning of subsurface system 2 and conse~uently surface system 1 is accomplished by means of hydraulic motors 49 ~ on tracked systems 41 and 42~ By increasing the speed of either track system 41 or 42, a turning motion is effected similar to that of a caterpillar type tractor. Power unit 22 and variable speed hydraulic motors ~9 are coupled to provide variable forward speed ability of subsurface unit 2.
For transportation purposes, subsurface unit 2 is nested into the bottom of surface unit 1 as shown in Fi~ure 3.
This provides for a compact system to be moved forward onto a truck-trailer system for movement from one site to another.
Also provided on surface unit 1 is a separate power source 130 which could be an outboard motor to allow for movement of the nested system from one portion of a lake to another.
.. . . .. . .
~7~3~9 Other embodiments of the device or system can be envisaged using weed cutting systems other than the later-ally oscillatin~ system shown in the preferred embodiment.
Figure 6 d~scribes a rototilling type of system consisting of a drum fitted with retractable fingers or tines 111 which are driven by the power unit 22. The rototilling system tends to remove roots and weeds which are then picked up on conveyor 9 and transported to barge 4.
Another embodiment envisaged is shown in Figure 7 wherein high pressure water jets being expelled from a manifold, 120, are used to dislodge root bundles and low growing weeds.
sai~ root bundles and weeds are then transported by means of per~orated conveyor 9 into barge 4.
Having thus described a preferred embodiment of the weed harvesting system according to the present in-vention, it is understood that various alterations, modifi-cations and adaptations to the system may be made within the scope of the present invention which is de~ined and limited only by the following claims.
Claims (13)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A machine for use in mechanically controlling aquatic plants, comprising:
a floating surface unit;
a powered bottom unit;
means mounted on the bottom unit for removing weeds; and means interconnecting the surface and bottom units, for lifting and lowering the bottom unit relative to the surface unit to vary the proportion of the weight of the machine carried by the bottom unit and thus vary the load on the bottom unit.
a floating surface unit;
a powered bottom unit;
means mounted on the bottom unit for removing weeds; and means interconnecting the surface and bottom units, for lifting and lowering the bottom unit relative to the surface unit to vary the proportion of the weight of the machine carried by the bottom unit and thus vary the load on the bottom unit.
2. A machine as set forth in claim 1 wherein:
the interconnecting means comprises a scissor-type structure actuated by a power cylinder.
the interconnecting means comprises a scissor-type structure actuated by a power cylinder.
3. A machine as set forth in claim 2 wherein:
the scissor-type structure is actuated by a pair of horizontal hydraulic rams carried by the surface unit.
the scissor-type structure is actuated by a pair of horizontal hydraulic rams carried by the surface unit.
4. A machine as set forth in claim 1 wherein:
the interconnecting means is pivotally attached to the bottom unit to permit longitudinal pivotal movement of the bottom unit independent of the surface unit.
the interconnecting means is pivotally attached to the bottom unit to permit longitudinal pivotal movement of the bottom unit independent of the surface unit.
5. A machine as set forth in claim 3, wherein:
the interconnecting means is pivotally attached to the bottom unit to permit longitudinal pivotal movement of the bottom unit in-dependent of the surface unit.
the interconnecting means is pivotally attached to the bottom unit to permit longitudinal pivotal movement of the bottom unit in-dependent of the surface unit.
6. A machine as set forth in claim 5 wherein:
the surface unit is a twin-hulled catamaran carrying a power source to drive the machine.
the surface unit is a twin-hulled catamaran carrying a power source to drive the machine.
7. A machine as set forth in claim 6 wherein.
the bottom unit is a tracked vehicle having a left and right track system, each system being separately powered by a hydraulic motor.
the bottom unit is a tracked vehicle having a left and right track system, each system being separately powered by a hydraulic motor.
8. A machine as set forth in claim 7 wherein:
the means for removing weeds comprises a plurality of wedge-shaped knives adapted to oscillate laterally beneath the surface of the lake bottom.
the means for removing weeds comprises a plurality of wedge-shaped knives adapted to oscillate laterally beneath the surface of the lake bottom.
9. A machine as set forth in claim 8 wherein:
the means for removing weeds is pivotally attached to the bottom unit to allow for adjustments in cutting depth.
the means for removing weeds is pivotally attached to the bottom unit to allow for adjustments in cutting depth.
10. A machine as set forth in claim 7 wherein:
the means for removing weeds comprises a hydraulically powered rotating drum fitted with protruding retractable fingers to provide a rototilling action.
the means for removing weeds comprises a hydraulically powered rotating drum fitted with protruding retractable fingers to provide a rototilling action.
11. A machine as set forth in claim 10 wherein:
the means for removing weeds is pivotally attached to the bottom unit to allow for adjustments in cutting depth.
the means for removing weeds is pivotally attached to the bottom unit to allow for adjustments in cutting depth.
12. A machine as set forth in claim 7 wherein:
the means for removing weeds comprises a manifold supplied with high pressure fluid and fitted with a plurality of nozzles to direct high pressure streams of water at the weed root bundles.
the means for removing weeds comprises a manifold supplied with high pressure fluid and fitted with a plurality of nozzles to direct high pressure streams of water at the weed root bundles.
13. A machine as set forth in claim 12 wherein:
the means for removing weeds is pivotally attached to the bottom unit to allow for adjustments in cutting depth.
the means for removing weeds is pivotally attached to the bottom unit to allow for adjustments in cutting depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA284,487A CA1076369A (en) | 1977-08-09 | 1977-08-09 | Aquatic weed control machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA284,487A CA1076369A (en) | 1977-08-09 | 1977-08-09 | Aquatic weed control machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1076369A true CA1076369A (en) | 1980-04-29 |
Family
ID=4109310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA284,487A Expired CA1076369A (en) | 1977-08-09 | 1977-08-09 | Aquatic weed control machine |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1076369A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5069023A (en) * | 1990-06-25 | 1991-12-03 | Modtech Industries, Inc. | Aquatic vegetation harvester |
| FR2671686A1 (en) * | 1991-01-22 | 1992-07-24 | Binard Andre | Device for cutting stalks of seaweed on seabeds, and installation for gathering seaweed implementing such a device |
| WO2004017715A1 (en) * | 2002-08-26 | 2004-03-04 | Freshwater Environmental Management Pty Ltd | Aquatic plant harvester |
| CN109403292A (en) * | 2018-12-14 | 2019-03-01 | 郭宇 | A kind of river course clear up device |
| CN111764364A (en) * | 2018-08-21 | 2020-10-13 | 李云魁 | Shear type salvaging device and method for short pearls |
-
1977
- 1977-08-09 CA CA284,487A patent/CA1076369A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5069023A (en) * | 1990-06-25 | 1991-12-03 | Modtech Industries, Inc. | Aquatic vegetation harvester |
| FR2671686A1 (en) * | 1991-01-22 | 1992-07-24 | Binard Andre | Device for cutting stalks of seaweed on seabeds, and installation for gathering seaweed implementing such a device |
| WO2004017715A1 (en) * | 2002-08-26 | 2004-03-04 | Freshwater Environmental Management Pty Ltd | Aquatic plant harvester |
| EP1538890A1 (en) * | 2002-08-26 | 2005-06-15 | Freshwater Environmental Management Pty Ltd | Aquatic plant harvester |
| JP2005537033A (en) * | 2002-08-26 | 2005-12-08 | フレッシュウォーター エンヴァイロメンタル マネジメント ピーティーワイ リミテッド | Aquatic plant intake machine |
| CN100375593C (en) * | 2002-08-26 | 2008-03-19 | 淡水环境管理股份有限公司 | Aquatic plant harvester |
| EP1538890A4 (en) * | 2002-08-26 | 2013-02-20 | Freshwater Environmental Man Pty Ltd | Aquatic plant harvester |
| US8479481B2 (en) | 2002-08-26 | 2013-07-09 | Freshwater Environmental Management Pty Ltd | Aquatic plant harvester |
| CN111764364A (en) * | 2018-08-21 | 2020-10-13 | 李云魁 | Shear type salvaging device and method for short pearls |
| CN109403292A (en) * | 2018-12-14 | 2019-03-01 | 郭宇 | A kind of river course clear up device |
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