Pressure relieving circuit for a series cylinder depth control

Details Pressure relieving circuit for a series cylinder depth control Pressure relieving circuit for a series cylinder depth control

A - Human Necessities

01

B

A01B 63/32 (2006.01) A01B 63/22 (2006.01) A01B 73/04 (2006.01)

Patent

CA 2122810

A one-way pressure bleed off path is provided between the series cylinder depth control circuit and an additional hydraulic circuit for an agricultural implement to prevent pressure build-up and hose expansion that otherwise would cause uneven series cylinder extension and uneven implement depth. A line including an orifice and a one-way check valve is added between the depth control circuit and the second circuit, such as the wing fold circuit for the implement, to bleed off any series cylinder pressure build-up through the otherwise unused second circuit. The orifice limits the amount of oil that is returned to reservoir during operation of the series circuit to lower the implement. The check valve isolates the depth control circuit and the second circuit to prevent unwanted cylinder operation while the wings are being folded.

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