Claims
- 1. A field marker, comprising:
- an inner arm having a proximal end and a distal end, wherein said proximal end is pivotally attached to a bracket means which is attachable to an implement frame;
- an outer arm having a proximal end and a distal end, wherein said proximal end of said outer arm is pivotally attached to said distal end of said inner arm;
- a marking means attached to said distal end of said outer arm;
- a first hydraulic cylinder attached between said bracket means and said inner arm, wherein said first hydraulic cylinder pivots said inner arm with respect to said implement frame;
- a second hydraulic cylinder attached between said inner arm and said outer arm, wherein said second hydraulic cylinder pivots said outer arm with respect to said inner arm; and
- wherein said first hydraulic cylinder and said second hydraulic cylinder are fluidly connected in series to one another so that they operate substantially simultaneously to extend or retract said inner arm and said outer arm with respect to said implement frame.
- 2. The field marker of claim 1, including a connecting means attached between said second hydraulic cylinder and said outer arm, wherein said connecting means allows said outer arm to freely pivot with respect to said inner arm when fully extended.
- 3. The field marker of claim 2, wherein said inner arm pivots along a substantially horizontal plane.
- 4. The field marker of claim 3, wherein said inner arm is positioned substantially parallel to a side of said implement frame when in a storage position.
- 5. The field marker of claim 4, wherein said outer arm pivots along a substantially vertical plane which is parallel to said inner arm.
- 6. The field marker of claim 5, wherein:
- a first line is fluidly connected to a first end of said first hydraulic cylinder and fluidly connectable to a hydraulic system of a tractor;
- a second line is fluidly connected between a second end of said first hydraulic cylinder and a first end of said second hydraulic cylinder; and
- a third line is fluidly connected to a second end of said second hydraulic cylinder and fluidly connectable to said hydraulic system of said tractor.
- 7. The field marker of claim 1, wherein said first hydraulic cylinder is larger in diameter than said second hydraulic cylinder which forces said second hydraulic cylinder to operate at the same speed as said first hydraulic cylinder.
- 8. The field marker of claim 7, wherein said first hydraulic cylinder is comprised of a rephasing hydraulic cylinder for allowing said second hydraulic cylinder to completely extend or retract.
- 9. The field marker of claim 8, wherein said connecting means is comprised of a connecting member pivotally connected between said second hydraulic cylinder and said outer arm, wherein when said second hydraulic cylinder is fully extended said outer arm may freely move upwardly and downwardly.
- 10. The field marker of claim 9, including at least one Y-shaped support member attached to an upper surface of said inner arm for receiving and supporting said outer arm when in a storage position.
- 11. The field marker of claim 10, including a locking member pivotally attached near said Y-shaped support member for retaining said outer arm within said Y-shaped support member.
- 12. The field marker of claim 11, including a pair of elbow members pivotally attached to said distal end of said inner arm and securing said outer arm, wherein said connecting member is pivotally attached centrally between said pair of elbow members.
- 13. A field marker, comprising:
- an inner arm having a proximal end and a distal end, wherein said proximal end is pivotally attached to a bracket means which is attachable to an implement frame;
- an outer arm having a proximal end and a distal end, wherein said proximal end of said outer arm is pivotally attached to said distal end of said inner arm;
- a marking means attached to said distal end of said outer arm;
- a first hydraulic cylinder attached between said implement frame and said inner arm, wherein said first hydraulic cylinder pivots said inner arm with respect to said implement frame;
- a second hydraulic cylinder attached between said inner arm and said outer arm, wherein said second hydraulic cylinder pivots said outer arm with respect to said inner arm; and
- wherein said first hydraulic cyclinder and said second hydraulic cylinder are fluidly connected in series to one another so that they operate substantially simultaneously to extend or retract said inner arm and said outer arm with respect to said implement frame.
- 14. The field marker of claim 13, including a connecting means attached between said second hydraulic cylinder and said outer arm, wherein said connecting means allows said outer arm to freely pivot with respect to said inner arm when fully extended.
- 15. The field marker of claim 14, wherein said inner arm pivots along a substantially horizontal plane and said outer arm pivots along a substantially vertical plane, wherein said vertical plane is parallel to said inner arm.
- 16. The field marker of claim 15, wherein:
- a first line is fluidly connected to a first end of said first hydraulic cylinder and fluidly connectable to a hydraulic system of a tractor;
- a second line is fluidly connected between a second end of said first hydraulic cylinder and a first end of said second hydraulic cylinder; and
- a third line is fluidly connected to a second end of said second hydraulic cylinder and fluidly connectable to said hydraulic system of said tractor.
- 17. The field marker of claim 16, wherein said first hydraulic cylinder is larger in diameter than said second hydraulic cylinder which forces said second hydraulic cylinder to operate at the same speed as said first hydraulic cylinder.
- 18. The field marker of claim 17, wherein said first hydraulic cylinder is comprised of a rephasing hydraulic cylinder for allowing said second hydraulic cylinder to completely extend or retract.
CROSS-REFERENCE TO RELATED PATENT APPLICATION
This application is a continuation-in-part of prior patent application Ser. No. 08/617,351, filed Mar. 18, 1996, now U.S. Pat. No. 5,785,128, entitled `Field Marker`.
US Referenced Citations (6)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
617351 |
Mar 1996 |
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