Hydraulic implement fluid recovery

Patent metadata

Field	Value
Publication number	US-10918004-B2
Application number	US-201815978896-A
Country	US
Kind code	B2
Filing date	May 14, 2018
Priority date	May 14, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

An implement includes a mechanical coupling component configured to removably couple the implement to a support machine, a hydraulic fluid supply line configured to receive a supply flow of hydraulic fluid under pressure from a hydraulic system associated with the support machine, and a hydraulically-powered component configured to be actuated using the hydraulic fluid. The implement also includes a hydraulic fluid recovery system comprising a hydraulic fluid return line configured to fluidically couple to the hydraulic system associated with the support machine and provide a return flow of hydraulic fluid to the hydraulic system. A hydraulic fluid reservoir is configured to, when the hydraulic fluid return line is decoupled from the hydraulic system associated with the support machine, receive a portion of the hydraulic fluid from the hydraulic fluid return line when a fluid pressure in the hydraulic fluid return line increases to a pressure threshold.

First claim

What is claimed is:

1. An implement comprising:
a mechanical coupling component configured to removably couple the implement to a support machine;
a hydraulic fluid supply line configured to receive a supply flow of hydraulic fluid under pressure from a hydraulic system associated with the support machine;
a hydraulically-powered component configured to be actuated, using the hydraulic fluid; and
a hydraulic fluid recovery system comprising:
a hydraulic fluid return line comprising an implement connector configured to connect to a corresponding support machine connector on the support machine, the hydraulic fluid return line configured to:
fluidically couple to the hydraulic system associated with the support machine; and
provide a return flow of hydraulic fluid to the hydraulic system; and

a hydraulic fluid reservoir configured to:
when the hydraulic fluid return line is decoupled from the hydraulic system associated with the support machine,
receive a portion of the hydraulic fluid from the hydraulic fluid return line when a fluid pressure in the hydraulic fluid return line increases to a first pressure threshold, wherein
the implement connector comprises a flow control mechanism configured to allow fluid flow through the implement connector when the fluid pressure reaches, a second pressure threshold, and
the first pressure threshold is less than the second pressure threshold.

2. The implement of claim 1 , wherein the support machine comprises a support vehicle configured to tow the implement using the mechanical coupling component.

3. The implement of claim 1 , wherein the implement comprises an agricultural implement and the hydraulically-powered component is configured to perform an agricultural operation.

4. The implement of claim 3 , wherein the agricultural operation comprises at least one of:
a seeding operation, a planting operation, a bailing operation, a tilling operation, or a mowing operation.

5. The implement of claim 1 , wherein the fluid pressure in the hydraulic fluid return line increases due to thermal expansion of the hydraulic fluid.

6. The implement of claim 1 , wherein the pressure threshold is based on a back pressure applied by the hydraulic fluid reservoir to the hydraulic fluid received from the hydraulic fluid return line.

7. The implement of claim 6 , wherein the hydraulic fluid reservoir comprises a pressurized accumulator.

8. The implement of claim 6 , wherein the reservoir is at an elevated position on the implement relative to the hydraulic fluid return line.

9. The implement of claim 1 , wherein the flow control mechanism comprises a thermal relief valve configured to open at the second pressure threshold.

10. An implement comprising:
a mechanical coupling component configured to removably couple the implement to a support machine;
a hydraulic fluid supply line configured to receive a supply flow of hydraulic fluid under pressure from a hydraulic system associated with the support machine;
a hydraulically-powered component configured to be actuated using the hydraulic fluid;
a hydraulic fluid recovery system comprising:
a hydraulic fluid return line configured to:
fluidically couple to the hydraulic system associated with the support machine; and
provide a return flow of hydraulic fluid to the hydraulic system; and

a hydraulic fluid reservoir configured to:
when the hydraulic fluid return line is decoupled from the hydraulic system associated with the support machine,
receive a portion of the hydraulic fluid from the hydraulic fluid return line when a fluid pressure in the hydraulic fluid return line increases to a pressure threshold;

a load sense return line configured to fluidically couple to sensing circuitry associated with the hydraulic system; and
a flow control mechanism configured to bleed fluid from the load sense return line to the hydraulic fluid reservoir when pressure in the load sense return line reaches a threshold pressure.

11. The implement of claim 1 , wherein the hydraulic fluid recovery system is configured to convey the hydraulic fluid stored in the hydraulic fluid reservoir to the hydraulic system when the hydraulic fluid return line is coupled to the hydraulic system.

12. A hydraulic system for an implement, the hydraulic system comprising:
a supply line connection configured to removably couple a hydraulic fluid supply line to a source hydraulic system associated with a support machine;
a return line connection configured to removably couple a hydraulic fluid return line to the source hydraulic system, the hydraulic fluid return line comprising an implement connector configured to connect to a corresponding support machine connector on the support machine; and
a hydraulic fluid recovery component configured to convey hydraulic fluid from the hydraulic fluid return line to a hydraulic fluid reservoir
while the hydraulic fluid return line is decoupled from the source hydraulic system, and
when fluid pressure in the hydraulic fluid return line reaches a first pressure threshold, wherein
the implement connector comprises a flow control mechanism configured to allow fluid flow through the implement connector when the fluid pressure reaches a second pressure threshold, and
the first pressure threshold is less than the second pressure threshold.

13. The hydraulic system of claim 12 , wherein the implement comprises an agricultural implement having a hydraulically powered component configured to perform an agricultural operation.

14. The hydraulic system of claim 12 , wherein the pressure threshold is based on a hack pressure applied by the hydraulic fluid reservoir to the hydraulic fluid received from the hydraulic fluid return line.

15. The hydraulic system of claim 14 , wherein the hydraulic fluid reservoir comprises a pressurized accumulator.

16. The hydraulic system of claim 12 , wherein the hydraulic fluid recovery system is configured to convey the hydraulic fluid stored in the hydraulic fluid reservoir to the hydraulic system when the hydraulic fluid return line is coupled to the hydraulic system.

Assignees

• Deere & Co

Inventors

• Whitney Michael M
• Maro Randall A

Classifications

• A01B59/00 Primary

  Devices specially adapted for connection between animals or tractors and agricultural machines or implements · CPC title

• F15B2215/30

  Constructional details thereof · CPC title

• F15B2211/6051

  having valve means between output member and the load sensing circuit · CPC title

• F15B2211/353

  Flow control by regulating means in return line, i.e. meter-out control · CPC title

• F15B9/08

  controlled by valves affecting the fluid feed or the fluid outlet of the servomotor (F15B9/06 takes precedence) · CPC title