Apparatus and method for cutting and treating vegetation

• US 6,125,621 A
• Filed: 02/09/1998
• Issued: 10/03/2000
• Est. Priority Date: 08/17/1995
• Status: Expired due to Term

• Current Assignee: Burch Company, Environmentally Sensitive Vegetation Control, LLC
• Original Assignee: Thomas B. Burch
• Inventors: Burch, Thomas B.
• Primary Examiner(s): PEZZUTO, ROBERT ERIC
• Application Number:
  US09/011,589
• Time in Patent Office: 967 Days
• Field of Search: 56/16.4 A, 56/16.8, 56/255, 56/295, 56/14.7, 56/DIG. 5, 293/214, 293/222.11, 293/DIG. 6
• US Class Current: 56/16.8
• CPC Class Codes: A01D 2101/00 Lawn-mowers
• CPC Class Codes: A01D 43/14 with dispensing apparatus, e.g. for fertilisers, herbicides or preservatives

Abstract

An apparatus and a method for cutting vegetation and simultaneously treating the remaining stems of the cut vegetation with a treatment fluid. The apparatus includes a mower, a cutting blade drive rotatably mounted on the mower, a blade carrier secured to the rotatable drive, and at least one cutting blade assembly rotatably mounted on the blade carrier. The apparatus further includes a fluid container for containing the treatment fluid in a plurality of interconnected, stackable and removable fluid container cells, a pumping device for pumping the treatment fluid to the at least one cutting blade assembly, a flow control device for metering the amount of treatment fluid that is pumped to the at least one cutting blade assembly, and a fluid conduit device for delivering the treatment fluid from the fluid container to the cutting and treating device. The method includes the steps of cutting vegetation with at least one cutting blade, and delivering a treatment fluid to the underside of the at least one cutting blade in a continuous stream so that the treatment fluid is continuously available to the remaining stems of the cut vegetation.

Claims

1. An apparatus for cutting vegetation and treating the cut vegetation with a treatment fluid, said apparatus comprising:

at least one cutting blade;

fluid container means for containing the treatment fluid, said fluid container means in fluid communication with said at least one cutting blade;

fluid conduit means defining a fluid passageway for delivering the treatment fluid in a continuous stream from said fluid container means to the underside of said at least one cutting blade so that the treatment fluid is continuously available to the cut vegetation at the time that the vegetation is cut.

2. An apparatus according to claim 1 further comprising

pumping means for pumping the treatment fluid from said fluid container means to the underside of said at least one cutting blade;

and

flow control means coupled to said pumping means for metering the amount of the treatment fluid delivered to said at least one cutting blade through said fluid conduit means.

3. An apparatus according to claim 1 further comprising

a mower comprising

a generally planar mower deck;

cutting blade drive means rotatably mounted to said mower deck; and

a blade carrier secured to said cutting blade drive means; and

wherein said at least one cutting blade is rotatably mounted to said blade carrier.

4. An apparatus according to claim 3 further comprising

pumping means for pumping the treatment fluid from said fluid container means to said at least one cutting blade;

and

flow control means coupled to said pumping means for metering the amount of the treatment fluid delivered to said at least one cutting blade through said fluid conduit means.

5. An apparatus according to claim 3 wherein said cutting blade drive means is powered by the power take-off from a tractor.

6. An apparatus according to claim 5 wherein said cutting blade drive means comprises a bevel gear for cooperating with a rotating drive shaft provided on the power take-off from the tractor.

7. An apparatus according to claim 3 wherein said mower deck has a central opening and wherein said cutting blade drive means comprises a drive shaft which is rotatably received in the central opening of said mower deck.

8. An apparatus according to claim 7 wherein said cutting blade drive means further comprises a housing secured to said mower deck and having a central opening therein, an annular lower spherical bearing and an annular upper spherical bearing and wherein said lower spherical bearing and said upper spherical bearing are positioned within the central opening provided in said housing.

9. An apparatus according to claim 8 wherein said drive shaft of said cutting blade drive means is rotatably positioned within said lower spherical bearing and said upper spherical bearing so that said drive shaft rotates freely relative to said housing and said mower deck.

10. An apparatus according to claim 9 wherein said drive shaft of said cutting blade drive means comprises an upper end and a lower end and wherein said upper end of said drive shaft is externally threaded to receive a hex nut thereon for securing said lower spherical bearing and said upper spherical bearing to said drive shaft.

11. An apparatus according to claim 10 wherein said lower end of said drive shaft is externally threaded to receive a hex nut thereon for securing said blade carrier to said cutting blade drive means.

12. An apparatus according to claim 8 wherein said housing of said cutting blade drive means has an opening provided therein which is tapped and threaded to receive a fluid-tight fitting which is in fluid communication with said fluid container means.

13. An apparatus according to claim 12 wherein said cutting blade drive means further comprises an annular flange secured to the underside of said housing, said flange comprising a medial wall having a circumferential pocket formed therein.

14. An apparatus according to claim 13 wherein said flange further comprises an upper surface having a well formed therein opposite the opening formed in said housing and wherein the well formed in said upper surface of said flange terminates in a radial bore formed in said flange, one end of said bore closed by a fluid-tight setscrew, said flange further having a circumferential pocket formed therein adjacent the open end of said bore.

15. An apparatus according to claim 14 wherein said drive shaft of said cutting blade drive means has a first radial bore formed therein adjacent said pocket formed in said flange.

16. An apparatus according to claim 15 wherein said cutting blade drive means further comprises an annular upper seal and an annular lower seal, said upper seal and said lower seal positioned adjacent said pocket formed in said flange to form a fluid-tight seal between said pocket and the external surface of said drive shaft so that said bore formed in said flange is in continuous fluid communication with said first bore of said drive shaft;

and wherein

said first bore of said drive shaft terminates in a longitudinally extending axial bore formed in said drive shaft and having one end closed by a fluid-tight setscrew; and

wherein

said drive shaft has a second radial bore formed therein and extending outwardly from said axial bore adjacent said blade carrier.

17. An apparatus according to claim 3 wherein said blade carrier has a central opening for receiving said cutting blade drive means and at least one opening spaced outwardly from the central opening, said blade carrier further having a channel formed therein extending between the central opening and the at least one opening spaced outwardly from the central opening.

18. An apparatus according to claim 17 wherein said blade carrier comprises an elongate bar comprising an upper half secured to a lower half and wherein said at least one opening spaced outwardly from the central opening is located adjacent an opposed end of said bar and receives said at least one cutting blade therein.

19. An apparatus according to claim 17 wherein said blade carrier comprises a disk and wherein the at least one opening spaced outwardly from the central opening is located adjacent the outer edge of said disk and receives said at least one cutting blade therein.

20. An apparatus according to claim 19 wherein said disk has a plurality of openings spaced outwardly from the central opening and located adjacent the outer edge of said disk, each opening receiving said at least one cutting blade therein.

21. An apparatus according to claim 17 wherein said blade carrier comprises a circumferential pocket formed on the central opening adjacent said channel so that said channel is in fluid communication with said cutting blade drive means.

22. An apparatus according to claim 17 wherein said channel of said blade carrier terminates in a second circumferential pocket formed on the at least one opening spaced outwardly from the central opening so that said blade carrier is in fluid communication with said at least one cutting blade.

23. An apparatus according to claim 22 wherein said at least one cutting blade comprises a shaft rotatably received in the at least one opening spaced outwardly from the central opening so that said at least one cutting blade can rotate relative to said blade carrier.

24. An apparatus according to claim 23 wherein said at least one cutting blade further comprises a cutter blade hub and said shaft comprises an upper end and a lower end, said upper end of said shaft having a hex head jam nut formed thereon for removing and replacing said cutter blade hub on said shaft, said lower end of said shaft externally threaded with male threads and said cutter blade hub internally threaded with female threads, the male and female threads cooperating to secure said cutting blade hub tightly on said shaft.

25. An apparatus according to claim 23 wherein said at least one cutting blade further comprises an annular lower spherical bearing and an annular upper spherical bearing press fit into the at least one opening spaced outwardly from the central opening of said blade carrier to permit said shaft of said at least one cutting blade to rotate.

26. An apparatus according to claim 23 wherein said shaft of said at least one cutting blade has a radial bore formed therein adjacent said circumferential pocket of said blade carrier, said radial bore extending inwardly from said pocket and terminating in a longitudinally extending axial bore formed in said shaft and closed by a fluid-tight plug secured to the underside of said cutting blade hub.

27. An apparatus according to claim 26 wherein said at least one cutting blade further comprises an annular upper seal and an annular lower seal positioned on said shaft adjacent said pocket of said blade carrier and adjacent said radial bore of said shaft to form a fluid-tight seal between said pocket and the external surface of said shaft so that said radial bore of said shaft is in fluid communication with said channel of said carrier blade.

28. An apparatus according to claim 26 wherein said cutting blade hub has a bore formed closed at one end by a fluid-tight setscrew, said bore extending outwardly from said axial bore of said shaft and terminating at an opening adjacent a gap between said cutting blade hub and the underside of said at least one cutting blade.

29. An apparatus according to claim 28 wherein the gap between said cutting blade hub and the underside of said at least one cutting blade is between about 0.25 and 1.0 inches wide.

30. An apparatus according to claim 28 wherein the gap between said cutting blade hub and the underside of said at least one cutting blade is about 0.5 inches wide.

31. An apparatus according to claim 28 wherein said bore of said cutting blade hub is rifled to impart a slight vortex to the treatment fluid exiting the bore.

32. An apparatus according to claim 4 wherein said fluid conduit means comprises a flexible tube which extends outwardly from said fluid container means and passes through said pumping means to said cutting blade drive means.

33. An apparatus according to claim 32 wherein said cutting blade drive means comprises a housing and a drive shaft;

said at least one cutting blade comprises a shaft and a cutting blade hub; and

said fluid conduit means further comprises

a well, a radial bore and a circumferential pocket formed in said housing of said cutting blade drive means;

a first radial bore, an axial bore and a second radial bore formed in said drive shaft of said cutting blade drive means;

a first circumferential pocket, a fluid channel and a second circumferential pocket formed in said blade carrier;

a radial bore and an axial bore formed in said shaft of said at least one cutting blade; and

a bore formed in said cutting blade hub of said at least one cutting blade.

34. An apparatus according to claim 33 wherein said fluid conduit means terminates adjacent a gap opposite the underside of said at least one cutting blade.

35. An apparatus according to claim 3 wherein said mower is selected from the group consisting of a push lawnmower, a conventional power lawnmower, a riding lawnmower, an engine driven tractor, a bushog mower, a batwing mower, a harvester, a hydraulic feller buncher, a high speed saw head, a high speed shear head, a sickle bar, a multiple disk mower, a reel mower, a flail mower and a mower head attached to the end of a hinged boom arm.

36. An apparatus according to claim 4 wherein said mower is a bushog mower attached to and pulled behind a tractor and said flow control means is coupled to the rear axle of the tractor.

37. A mower apparatus for cutting vegetation and treating the cut vegetation with a treatment fluid, said apparatus comprising:

at least one cutting blade;

fluid container means for containing the treatment fluid, said fluid container means in fluid communication with said at least one cutting blade;

fluid conduit means defining a fluid passageway for delivering the treatment fluid in a continuous stream from said fluid container means to said at least one cutting blade so that the treatment fluid is continuously available to the cut vegetation at the time that the vegetation is cut;

a generally planar mower deck;

cutting blade drive means rotatably mounted to said mower deck; and

a blade carrier secured to said cutting blade drive means wherein said at least one cutting blade is rotatably mounted to said blade carrier;

pumping means for pumping the treatment fluid from said fluid container means to said at least one cutting blade;

flow control means coupled to said pumping means for metering the amount of the treatment fluid delivered to said at least one cutting blade through said fluid conduit means;

wherein said pumping means comprises a variable capacity pump for pumping variable amounts of the treatment fluid through said fluid conduit means depending on the speed of said mower over the ground.

38. An apparatus according to claim 37 wherein said pumping means comprises a peristaltic pump which pumps the treatment fluid through said fluid conduit means via waves of contraction produced by a series of rollers which compress the fluid conduit means containing the treatment fluid.

39. A mower apparatus for cutting vegetation and treating the cut vegetation with a treatment fluid, said apparatus comprising

at least one cutting blade;

fluid container means for containing the treatment fluid, said fluid container means in fluid communication with said at least one cutting blade;

fluid conduit means defining a fluid passageway for delivering the treatment fluid in a continuous stream from said fluid container means to said at least one cutting blade so that the treatment fluid is continuously available to the cut vegetation at the time that the vegetation is cut;

pumping means for pumping the treatment fluid from said fluid container means to said at least one cutting blade;

flow control means coupled to said pumping means for metering the amount of the treatment fluid delivered to said at least one cutting blade through said fluid conduit means;

wherein said fluid conduit means further comprises;

a pulsing sealed hollow shaft fluid delivery apparatus having a center with a hollow stationary shaft at said center;

said hollow shaft having an outlet port in communication with said fluid container means;

an inner race having an outlet port, said inner race in contact with and surrounding said hollow shaft;

a seal surrounding and in slidable contact with said inner race;

ball bearings packed in said seal;

an outer race surrounding the ball bearings;

a hollow rotating shaft in sliding contact with said outer race;

at least one hollow spoke in fluid communication with fluid within said hollow rotating shaft; and

a fitting in communication with said hollow spoke having a nipple for engagement with piping;

wherein said hollow spoke rotates about said hollow stationary shaft and upon alignment with said outlet port additional liquid is pulsed through the system resulting in placement of fluid on the lower cutting edge of the blade.

40. An apparatus according to claim 39 further comprising a reel mower comprising:

a central axle configured as said pulsing sealed hollow shaft fluid delivery apparatus;

at least one blade support spoke fixed to said central axle;

at least one rotating blade fixed to said blade support spoke;

at least one tube communicating with said nipple and terminating and in communication with said rotating blade;

a stationary anvil spaced slightly from said rotating blade; and

a roller spaced from said anvil;

wherein interaction of said rotating blade and said anvil facilitates the cut of vegetation and said tubing supplies treatment fluid to said rotating blade.

41. An apparatus according to claim 39 further comprising a flail mower comprising:

a central axle configured as said pulsing sealed hollow shaft fluid delivery apparatus;

at least one rotating blade fixed to said central axle at least one fluid delivery bars communicating with said fitting and in communication with said rotating blade; and

a roller spaced from said rotating blade;

wherein said rotating blade facilitates the cut of vegetation and said fluid delivery bar supplies treatment fluid to said rotating blade.

42. A mower apparatus for cutting vegetation and treating the cut vegetation with a treatment fluid, said apparatus comprising

at least one cutting blade;

fluid container means for containing the treatment fluid, said fluid container means in, fluid communication with said at least one cutting blade;

fluid conduit means defining a fluid passageway for delivering the treatment fluid in a continuous stream from said fluid container means to said at least one cutting blade so that the treatment fluid is continuously available to the cut vegetation at the time that the vegetation is cut;

pumping means for pumping the treatment fluid from said fluid container means to said at leapt one cutting blade;

flow control means coupled to said pumping means for metering the amount of the treatment fluid delivered to said at least one cutting blade through said fluid conduit means;

wherein said fluid conduit means further comprises;

a pulsing hollow shaft fluid delivery system having a center with a hollow rotating shaft at said center;

said hollow shaft having an outlet port;

an inner race having a port, said inner race in contact with and surrounding said hollow shaft;

a seal surrounding and in slidable contact with said inner race;

ball bearings packed in said seal;

an outer race surrounding the ball bearings;

a hollow stationary shaft in sliding contact with said outer race;

at least one hollow spoke in fluid communication with fluid within said hollow stationary shaft; and

a fitting in communication with said hollow spoke having a nipple for engagement with piping;

wherein said hollow shaft rotates within said hollow stationary shaft and when the hollow spoke aligns with the outlet port from said hollow rotating shaft additional liquid is pulsed through the system resulting in placement of fluid on the lower cutting edge of the blade.

43. An apparatus according to claim 42 further comprising a sickle bar mower comprising:

a reciprocating bar;

a series of blades mounted to said reciprocating bar;

a series of guards spaced from and surrounding said series of blades;

a manifold having a fluid delivery tube seated in said series of guards;

said fluid delivery tube having exit ports; and

said fluid delivery tube communicating with said pulsing hollow shaft fluid delivery system

wherein fluid from said fluid delivery tube delivers treatment fluid to a lower edge of said series of blades.

44. A mower apparatus for cutting vegetation and treating the cut vegetation with a treatment fluid, said apparatus comprising

at least one cutting blade;

fluid container means for containing the treatment fluid, said fluid container means in fluid communication with said at least one cutting blade;

fluid conduit means defining a fluid passageway for delivering the treatment fluid in a continuous stream from said fluid container means to said at least one cutting blade so that the treatment fluid is continuously available to the cut vegetation at the time that the vegetation is cut;

pumping means for pumping the treatment fluid from said fluid container means to said at least one cutting blade;

flow control means coupled to said pumping means for metering the amount of the treatment fluid delivered to said at least one cutting blade through said fluid conduit means;

further comprising a reel mower comprising;

a central axle;

at least one blade support spoke fixed to said central axle;

at least one rotating blade fixed to said blade support spoke;

a stationary anvil spaced slightly from said rotating blade having a machined groove journaling a fluid delivery tube;

said fluid delivery tube having continuous slot exit ports; and

a roller spaced from said anvil;

wherein interaction of said rotating blade and said anvil facilitates the cut of vegetation and said tubing supplies treatment fluid to said rotating blade.

45. A mower apparatus for cutting vegetation and treating the cut vegetation with a treatment fluid, said apparatus comprising

at leapt one cutting blade;

fluid container means for containing the treatment fluid, said fluid container means in fluid communication with said at least one cutting blade;

fluid conduit means defining a fluid passageway for delivering the treatment fluid in a continuous stream from said fluid container means to said at least one cutting blade so that the treatment fluid is continuously available to the cut vegetation at the time that the vegetation is cut;

a generally planar mower deck;

cutting blade drive means rotatably mounted to said mower deck; and

a blade carrier secured to said cutting blade drive means wherein said at least one cutting blade is rotatably mounted to said blade carrier;

pumping means for pumping the treatment fluid from said fluid container means to said at least one cutting blade;

flow control means coupled to said pumping means for metering the amount of the treatment fluid delivered to said at least one cutting blade through said fluid conduit means;

wherein said flow control means further comprises ground speed detection means for detecting the ground speed of said mower.

46. An apparatus according to claim 45 wherein said ground speed detection means comprises

a cup-shaped sprocket carrier comprising a sprocket having a plurality of radial teeth thereon;

and

mechanical sensor means for engaging the teeth of said sprocket, said sensor means mechanically coupled to said pumping means.

49. An apparatus according to claim 46 wherein at least one axle of the mower comprises a rotating shaft and a non-rotating shaft and wherein said flange carrier is mounted to the rotating shaft of the at least one axle of the mower and said sensor is secured to the non-rotating shaft of the at least one axle of the mower.

50. An apparatus according to claim 45 wherein said mower comprises at least one wheel and said ground speed detection means is provided adjacent said at least one wheel of said mower.

51. An apparatus according to claim 45 wherein said mower comprises a plurality of wheels and a separate one of said ground speed detection means is provided adjacent each of said wheels of said mower.

52. An apparatus according to claim 45 wherein said flow control means further comprises a control unit electrically coupled to said ground speed detection means for processing predetermined input data and an electrical signal produced by said ground speed detection to determine the amount of treatment fluid to be delivered to said at least one cutting blade from said fluid container means.

53. An apparatus according to claim 52 wherein said control unit is electrically coupled to said pumping means and said control unit produces an electrical signal for controlling the operation of said pumping means.

54. An apparatus according to claim 52 wherein said flow control means further comprises a stepper drive motor and wherein said control unit is electrically coupled to said stepper drive motor and produces an electrical signal for controlling the operation of said stepper drive motor.

55. An apparatus according to claim 54 wherein said stepper drive motor is mechanically coupled to said pumping means for driving said pumping means.

56. An apparatus according to claim 52 wherein said control unit comprises a Global Positioning Satellite (GPS) transceiver for transmitting the location of said mower when the treatment fluid is delivered to said at least one cutting blade from said fluid container means.

57. An apparatus according to claim 52 wherein said control unit further comprises a DC voltage converter and a DC voltage regulator.

58. An apparatus according to claim 52 wherein said control unit further comprises an on-off toggle switch for powering said pumping means and a by-pass toggle switch for by-passing said pumping means.

47. An apparatus according to claim wherein said ground speed detection means comprises

a cup-shaped flange carrier comprising a flange having a plurality of radial teeth thereon;

and

electrical sensor means for sensing the angular velocity of the teeth of said flange, said sensor means electrically coupled to said pumping means.

48. An apparatus according to claim 47 wherein said flange of said flange carrier is made of a ferrous material and said electrical sensing means comprises an inductance sensor that senses the rate of fluctuation in the inductance measured by said sensor.