Soil leveling apparatus with improved frame and hitch

• US 5,024,280 A
• Filed: 06/27/1989
• Issued: 06/18/1991
• Est. Priority Date: 01/12/1981
• Status: Expired due to Term

• Current Assignee: Orlan H. Mork
• Original Assignee: Orlan H. Mork
• Inventors: Mork, Orlan H.
• Primary Examiner(s): Johnson, Richard J.
• Application Number:
  US07/372,027
• Time in Patent Office: 721 Days
• Field of Search: 172/197, 172/198, 172/445.1, 172/445.2, 172/684.5, 172/701.1, 172/701.3, 172/464, 172/196, 172/199, 172/200, 172/393, 172/780, 172/784, 172/785, 172/799.5 , 172/449, 172/439, 172/248, 172/173, 172/177, 172/150, 172/501, 172/149, 280/461 A, 280/497, 37/41, 37/48, 37/50, 404/106, 404/118, 404/119, 404/120
• US Class Current: 172/197
• CPC Class Codes: A01B 31/00 Drags graders for field cultivators graders in general E02F
• CPC Class Codes: A01B 49/027 with a rotating, soil working support element, e.g. a roller
• CPC Class Codes: E02F 3/7604 Combinations of scraper blades with soil loosening tools working independently of scraper blades soil loosening attachments fixed on blades E02F3/8152, E02F3/8155
• CPC Class Codes: E02F 3/7622 Scraper equipment with the scraper blade mounted on a frame to be hitched to the tractor by bars, arms, chains or the like, the frame having no ground supporting means of its own, e.g. drag scrapers

Abstract

An improved soil leveling apparatus (10) includes a frame (12), connecting hitch means (14), and adjustable lost motion linkage (48) secured to the top connection point (52) of the hitch, and an optional scarifier assembly (16) which is supported on a connector (66) pivoted between the legs (36, 40) of the hitch. The scraper member (18) of the frame (12) is of generally inverted J-shaped cross section, and tine subassemblies (90) can be substituted for the teeth (78) on the scarifier assembly (12).

Claims

1. An apparatus for leveling soil and the like, comprising:

a frame including a plurality of transverse elongate ground engaging members fixedly secured together in a mutually spaced apart relationship;

the ground engaging members of said frame being of inverted generally V-shaped cross section having an apex with downwardly diverging front and rear walls of different inclinations extending downwardly from the apex, and wherein the front wall is more steeply inclined than the rear wall, wherein the front and rear walls extend downwardly from the apex and terminate in lower edges which are substantially coplanar with one another in a substantially horizontal plane and which are in egagement with the ground when the frame is laid flat on the ground; and

hitch means carried on the frame for connecting the frame to a vehicle.

2. An apparatus as recited in claim 1, wherein the cross section of the ground engaging members is closed at the bottom by a substantially horizontal wear surface extending between the front and rear walls, wherein the wear surface is in engagement with the ground when the frame is placed flat on the ground.

3. An apparatus as recited in claim 2, wherein the ground engaging members have a hollow cross section in which the front and rear walls are formed by downwardly diverging front and rear legs and the wear surface is formed by a transverse wear plate fixedly secured to the front and rear legs.

4. An apparatus as recited in claim 1, wherein the cross section of the gorund engaging members is open at the bottom.

5. An apparatus as recited in claim 4, wherein the ground engaging members are formed by downwardly diverging front and rear legs.

6. An apparatus as recited in claim 5, wherein the lower edges of the walls are formed by transverse wear plates attached to the front and rear legs and extending downwardly therefrom to contact the ground.

7. An apparatus for leveling soil and the like, comprising:

a frame including a plurality of transverse elongate ground engaging members fixedly secured together in a mutually spaced apart relationship, the ground engaging members of said frame being of inverted generally V-shaped cross section with downwardly diverging front and rear legs of different inclinations, wherein ground engaging members have a closed cross-sectional construction in which the front and rear legs are closed at the bottom by a transverse surface.

8. An apparatus for leveling soil, comprising:

hitch means which is adapted for connection to a tractor or like motor vehicle;

frame means which is connected to said hitch means and which engages the ground; and

means connected to said frame means which is adapted for scarifying ground soil, said scarifying means comprising a plurality of tine members attached to a tool support member on the frame means, said tine members extending transversely relative to the frame means and having lower ends for engaging the ground, the lower ends of the tine members being in a non-parallel relationship such that the lower ends of adjacent tines diverge longitudinally relative to one another, whereby ground soil is less likely to become lodged in between said tine members as the frame means is moved longitudinally; and

wherein the tool support member is fixed to a sleeve and the sleeve is pivotally mounted on a cross shaft carried on the frame means, and further including means for limiting rearward rotation of the tool support member during forward movement of the frame means to allow the tine to scarify the soil but permitting rotation of the tool support member during reverse movement of the frame.

9. An apparatus as recited in claim 8, wherein the tines are fixedly secured to the tool support member.

10. An apparatus as recited in claim 8, wherein the tines are removably secured to the tool support member to ease replacement of any broken tines.

11. An apparatus as recited in claim 8, wherein the cross shaft is pivotally connected to the frame means to allow the height of the tool support member to be adjusted relative to the frame means.

12. An apparatus for leveling soil, comprising:

hitch means which is adapted for connection to a tractor or like motor vehicle;

frame means which is connected to said hitch means and which engages the ground; and

means connected to said frame means which is adapted for scarifying ground soil, said scarifying means comprising a plurality of tine members attached to a tool support member on the frame means, said tine members extending transversely relative to the frame means and having lower ends for engaging the ground, the lower ends of the tine members being in a non-parallel relationship such that the lower ends of adjacent tines diverge longitudinally relative to one another, whereby ground soil is less likely to become lodged in between said tine members as the frame means is moved longitudinally; and

wherein the tines are identically shaped having a generally straight upper end attached to the tool support member and a lower end which is longitudinally tilted relative to the upper portion, and wherein adjacent tines are reversed relative to one another on the tool support member to provide the non-parallel relationship of the lower ends of the tines.

13. An apparatus as recited in claim 12, wherein the tines are fixedly secured to the tool support member.

14. An apparatus for leveling soil, comprising:

hitch means which is adapted for connection to a tractor or like motor vehicle;

frame means which is connected to said hitch means and which engages the ground; and

means connected to said frame means which is adapted for scarifying ground soil, said scarifying means comprising a plurality of tine members attached to a tool support member on the frame means, said tine members extending transversely relative to the frame means and having lower ends for engaging the ground, the lower ends of the tine members being in a non-parallel relationship such that the lower ends of adjacent tines diverge longitudinally relative to one another, whereby ground soil is less likely to become lodged in between said tine members as the frame means is moved longitudnally; and

wherein two differently styled tines are provided comprising a first tine having a generally straight configuration and a second tine having a longitudinally inclined lower end, and wherein the first and second tines are alternated across the tool support member to provide the non-parallel relationship of the lower ends of the tines.

15. An apparatus as recited in claim 14, wherein the tines are removably secured to the tool support member to ease replacement of any broken tines.

16. An apparatus for leveling soil, comprising:

hitch means which is adapted for connection to a tractor or like motor vehicle;

frame means which is connected to said hitch means and which engages the ground; and

means connected to said frame means which is adapted for scarifying ground soil, said scarifying means comprising a plurality of tine members, said tine members extending transversely relative to the frame means and having lower ends for engaging the ground, the lower ends of the tine members being in a non-parallel relationship such that the lower ends of adjacent tines diverge longitudinally relative to one another, whereby ground soil is less likely to become lodged in between said tine members as the frame means is moved longitudinally; and

further including a plurality of tine subassemblies located side-by-side on the frame means with adjacent subassemblies being separated by small gaps, each subassembly comprising a tool support member having a plurality of tines mounted thereon, and further including an end tine having a straight leg portion supported on the tool support member and an offset leg portion extending outwardly from the stright leg portion to be located at approximately the end of the tool support member, and wherein an end tine is used on at least one end of the tool support member of some of the subassemblies to position an offset leg portion adjacent all of the interior gaps between subassemblies.

17. An apparatus as recited in claim 16, wherein the tine assemblies extend across substantially the entire width of the frame means.

18. An apparatus for leveling soil, comprising

hitch means which is adapted for connection to a tractor or like motor vehicle;

frame means which is connected to said hitch means and which engages the ground;

means for scarifying ground soil including at least one tooth element for engaging the soil;

means for rotatably mounting said scarifying means to said frame means for pivotal movement about an axis; and

means for pivotally moving said scarifying means about said axis, said moving means comprising a piston cylinder assembly, wherein said piston cylinder assembly is connected to said frame means by a mounting means which permits lost motion between the piston cylinder assembly and said frame means.

19. An apparatus as recited in claim 18, wherein the piston cylinder assembly has a piston end and a cylinder end, wherein the piston end is operatively coupled to the scarifying mounting means for rotating the same, and wherein the piston cylinder assembly mounting means provides sliding motion of the cylinder end of the piston cylinder assembly relative to the frame means to allow reverse movement of the scarifying means without requiring actuation of the piston cylinder assembly.

20. An apparatus as recited in claim 19, wherein said piston cylinder assembly mounting means comprises a clevis which is connected to said piston cylinder assembly, and a pin which is connected to said frame means and is mounted within said clevis so as to permit free sliding motion.

21. An apparatus as recited in claim 19, wherein said piston cylinder assemby mounting means comprises a collar rotatably connected to said frame means, and wherein the cylinder end is slidably located within the collar so as tp permit free sliding motion.

22. An apparatus as recited in cliam 18, wherein said scarifier mounting means comprises:

a cross shaft fixedly connected to said frame means; and

a sleeve to which said scarifying means is connected mounted concentrically about said cross shaft for rotation thereon.

23. An apparatus as recited in claim 22, wherein the scarifying means comprises a plurality of tooth elements mounted to and spaced across the sleeve.

24. An apparatus for leveling soil, comprising:

hitch means which is adapted for connection to a tractor or like motor vehicle;

frame means which is connected to said hitch means and which engages the ground, the frame means including a plurality of transverse elongate ground engaging members fixedly secured together in a mutually spaced apart relationship and lying in a common plane;

means for scarifying ground soil including at least one tooth element for engaging the soil;

means for rotatably mounting said scarifying means to said frame means for pivotal movement about an axis, wherein said scarifier mounting means comprises a cross shaft fixedly connected to said frame means and a sleeve to which said scarifying means is connected mounted concentrically about said cross shaft for rotation thereon, wherein the cross shaft is located above the plane in which the ground engaging members lie; and

means connected to the sleeve for pivoting the sleeve about the cross shaft to raise or lower the scarifying means relative to the ground.

25. An apparatus as recited in claim 24, wherein the moving means comprises a piston cylinder assembly connected between the frame means and the sleeve.

26. An apparatus as recited in claim 25, wherein said piston cylinder assembly is connected to said frame means by a mounting means which permits lost motion between the piston cylinder assembly and said frame means.

27. An apparatus for leveling soil, comprising

hitch means which is adapted for connection to a tractor or like motor vehicle;

frame means which is connected to said hitch means and which engages the ground;

means for scarifying ground soil including at least one tooth element for engaging the soil; and

means for rotatably mounting said scarifying means to said frame means for pivotal movement about an axis, wherein said scarifier mounting means conmprises a cross shaft connected to said frame means and a sleeve to which said scarifying means is connected, wherein said sleeve is mounted concentrically about said cross shaft for rotation thereon; and

stop means extending between the sleeve and the cross shaft for limiting rotational movement of the scarifying means.

28. An apparatus as recited in claim 27, wherein the cross shaft is notched over a portion of its periphery to receive therein an inwardsly extending stop carrier on the sleeve, the engagement of the stop with at least one end face of the notch in the cross shaft forming the stop means that limits rotational movement of the scarifying means.

29. An apparatus for leveling soil, comprising:

hitch means which is adapted for connection to a tractor or like motor vehicle;

frame means which is connected to said hitch means and includes at least one surface for engaging the ground, the frame means including a transverse, elongate scraper member and at least one trailing transverse ground engaging member fixedly secured together in a mutually spaced apart relationship, the scraper member including a leading lower edge, and each ground engaging member including a lower surface, the leading edge of the scraper member and the lower surfaces of the ground engaging members being substantially coplanar;

means for scarifying ground soil including a plurality of transversely spaced teeth for engaging the soil, wherein the scarifying means is carried on the frame means behind the scraper member and in advance of the ground engaging members;

soil finishing means mounted to the frame means behind the ground engaging members for pivotal movement into and out of ground engagement, wherein said soil finishing means comprises a rotatably roller; and

means independent of the hitch means for selectively raising and lowering the soil finishing roller relative to the frame means into and out of engagement with the ground while the frame means remains in engagement with the ground.

30. An apparatus as recited in claim 29, wherein the raising and lowering means comprises a piston cylinder assembly.

31. An apparatus as recited in claim 29, wherein the roller includes a plurality of teeth thereon for engaging the ground.

32. Apparatus as recited in claim 29, further including:

a pair of longitudinal arms, each arm pivoted at one end to said frame means; and

wherein the roller is mounted between the other ends of said arms.

33. Apparatus as recited in claim 32, wherein the frame means comprises a pair of longitudinal side members between which the ground engaging surfaces are fixedly secured in a mutually spaced apart relationship, and further including a support bracket fixed to and extending upwardly from the longitudinal side members with the support brackets on the side members being longitudinally aligned with one another, and wherein each longitudinal arm has its one end pivotally connected to one of the support brackets at a location above the plane of the longitudinal side members to pivotally journal the arms on the frame means.

34. Apparatus as recited in claim 33 further including a cross-member extending between the arms at a location which is closer to the one end of the arms pivotally secured to the support brackets than to the other end of the arms carrying the roller, and further including a piston cylinder assembly carried on the frame, wherein the piston cylinder assembly includes a piston rod secured to the cross-member for effecting vertical movement of the arms when the piston rod is extended from or drawn into the cylinder.

35. An apparatus for leveling soil and the like, comprising:

a generally rectangular frame including a transverse, elongate scraper member and at least one trailing transverse elongate ground engaging member fixedly secured together in a mutually spaced apart relationship between a pair of longitudinal side members;

the scraper member including a leading lower edge, and each ground engaging member including a lower surface which is wider than the lower edge of the scraper member, the leading edge of the scraper member and the lower surfaces of the ground engaging members being substantially coplanar;

hitch means for mounting the frame to a vehicle;

a pair of longitudinal arms, each arm pivoted at one end to a side member of said frame means; and

soil finishing means mounted between the other ends of said arms for pivotal movement into and out of ground engagement in trailing relationship with the apparatus, wherein said soil finishing means comprises a rotatable roller.

36. An apparatus as recited in claim 35, further comprising means connected between said hitch means and said arms for selectively moving the soil finishing means between raised and lowered positions.

37. An apparatus as recited in claim 36, wherein the actuating means comprises a piston cylinder assembly.

38. An apparatus as recited in claim 35, further including means for scarifying ground soil including at least one tooth element for engaging the soil, wherein the scarifying means is carried on the frame means.

39. An apparatus as recited in claim 38, wherein the scarifying means is carried on the frame means behind the scraper member and in advance of the ground engaging members.

40. An apparatus as recited in claim 38, further including means for rotatably mounting said scarifying means to said frame means for pivotal movement about an axis to move the scarifying means into and out of engagement with the gorund.

41. A method of leveling soil, comprising:

trailing over the soil at least one scraper member having a lower edge for scraping the soil;

trailing over the soil behind the scraper member a plurality of spaced downwardly directed teeth which engage the soil for scarifying the soil;

trailing over the soil behind the scraper member and the scarifying teeth at least one elongate ground engaging member having a lower surface which is substantially coplanar with the lower edge of the scraper member, the lower surface being wider than the lower edge and adapted to bear against the soil to flatten the soil;

pulverizing the flattened soil by means of a rotatable roller which is trailed behind the ground engaging member; and

selective raising the roller out of engagement with the ground when the soil pulverizing function is not desired while leaving the scraper and the ground engaging members in engagement with the soil for continued soil flattening.

42. An apparatus as recited in claim 41, wherein the roller is toothed.

43. An apparatus for leveling soil and the like, comprising:

a frame including a plurality of transverse elongate ground engaging members fixedly secured together in a mutually spaced apart relationship;

the ground engaging members of said frame being of inverted generally V-shaped cross section with downwardly diverging front and rear walls of different inclinations, wherein the front and rear walls have lower edges which are substantially coplanar with one another in a substantially horizontal plane when the frame is laid on the ground, wherein the cross section of the ground engaging members is closed at the bottom by a substantially horizontal wear surface extending between the front and rear walls, and wherein the wear surface is in engagement with the ground when the frame is placed flat on the ground; and

hitch means carried on the frame for connecting the frame to a vehicle.

44. An apparatus as recited in claim 43, wherein the ground engaging members have a hollow cross section in which the front and rear walls are formed by downwardly diverging front and rear legs and the wear surface is formed by a transverse wear plate fixedly secured to the front and rear legs.

45. An apparatus as recited in claim 43, wherein the front wall is substantially upright to push the soil when the frame is moved in a forward direction, and wherein the rear wall is more inclined than the front wall to allow the soil to pass over the ground engaging member when the frame is moved in a reverse direction.

46. An apparatus for leveling soil and the like, comprising:

a frame including a plurality of transverse elongate ground engaging members fixedly secured together in a mutually spaced apart relationship;

the ground engaging members of said frame being of inverted generally V-shaped cross section with downwardly diverging front and rear walls of different inclinations, wherein the front and rear walls have lower edges which are substantially coplanar with one another in a substantially horizontal plane when the frame is laid flat on the ground, wherein the cross section of the ground engaging members is open at the bottom with the front and rear walls extending downwardly sufficiently far so that the lower edges of the walls are both in engagement with the ground when the frame is placed flat on the ground;

wherein the ground engaging members are formed by downwardly diverging front and rear legs, and wherein the lower edges of the walls are formed by transverse wear plates attached to the front and rear legs and extending downwardly therefrom to contact the ground; and

hitch means carried on the frame for connecting the frame to a vehicle.

47. An apparatus as recited in claim 46, wherein the front wall is substantially upright to push the soil when the frame is moved in a forward direction, and wherein the rear wall is more inclined than the front wall to allow the soil to pass over the ground engaging member when the frame is moved in a reverse direction.

48. An apparatus for working soil, comprising:

hitch means which is adapted for connection to a tractor or like motor vehicle;

frame means which is connected to said hitch means;

means for scarifying ground soil including at least one tooth element for engaging the soil;

means for rotatably mounting said scarifying means to said frame means for pivotal movement about an axis; and

means for pivotally moving said scarifying means about said axis, said moving means comprising a piston cylinder assembly, wherein said piston cylinder assembly is connected to said frame means by a mounting means which permits lost motion between the piston cylinder assembly and said frame means, whereby said at least one tooth may pivot during reverse movement of said frame means.

49. An apparatus as recited in claim 48, wherein the piston cylinder assembly has a piston end and a cylinder end, wherein the piston end is operatively coupled to the scarifying mounting means for rotating the same, and wherein the piston cylinder assembly mounting means provides sliding motion of the cylinder end of the piston cylinder assembly relative to the frame means to allow reverse movement of the scarifying means without requiring actuation of the piston cylinder assembly.

50. An apparatus as recited in claim 49, wherein said piston cylinder assembly mounting means comprises a clevis which is connected to said piston cylinder assembly, and a pin which is connected to said frame means and is mounted within said clevis so as to permit free sliding motion.

51. An apparatus as recited in claim 49, wherein said piston cylinder assembly mounting means comprises a collar rotatably connected to said frame means, and wherein the cylinder end is slidably located within the collar so as to permit free sliding motion.

52. An apparatus as recited in claim 48, wherein said scarifier mounting means comprises:

a cross shaft fixedly connected to said frame means; and

a sleeve to which said scarifying means is connected mounted concentrically about said cross shaft for rotation thereon.

53. An apparatus as recited in claim 52, wherein the scarifying means comprises a plurality of tooth elements mounted to and spaced across the sleeve.

54. An apparatus for working soil, comprising:

hitch means which is adapted for connection to a tractor or like motor vehicle;

frame means which is connected to said hitch means;

means for scarifying ground soil including at least one tooth element for engaging the soil; and

means for rotatably mounting said scarifying means to said frame means for pivotal movement about an axis, wherein said scarifier mounting means comprises a cross shaft connected to said frame means and a sleeve to which said scarifying means is connected, wherein said sleeve is mounted concentrically about said cross shaft rotation thereon; and

stop means extending between the sleeve and the cross shaft for limiting rotational movement of the scarifying means.

55. An apparatus as recited in claim 54, wherein the cross shaft is notched over a portion of its periphery to receive therein an inwardly extending stop carried on the sleeve, the engagement of the stop with at least one end face of the notch in the cross shaft forming the stop means that limits rotational movement of the scarifying means.