Patent ID: 8291934

Claim:
A valve assembly comprising: a valve housing defining: a first service passage; a first valve bore in fluid communication with the first service passage, the first valve bore having an inlet portion in fluid communication with an inlet passage of the valve housing, a first service portion in fluid communication with the first service passage, and a first load holding portion, the first valve bore having a first valve seat that is disposed between the inlet portion and the service portion; a first fluid passage in selective fluid communication with the first load holding portion of the first valve bore and the first service passage; a second valve bore in fluid communication with the first service passage, the second valve bore having a return portion in fluid communication with a return passage of the valve housing, a second service portion in fluid communication with the first service passage, and a second load holding portion, the second valve bore having a second valve seat that is disposed between the return passage and the first service passage; a second fluid passage in selective communication with the second load holding portion of the second valve bore and the return passage; an inlet valve disposed in the first valve bore, the inlet valve being moveable between a seated position and an unseated position; a return valve assembly disposed in the second valve bore, the return valve being moveable between a seated position and an unseated position; and a one-way valve disposed in the second fluid passage, wherein the one-way valve allows fluid to flow only in a direction from the second load holding portion to the return passage.