Flow sharing priority circuit for open circuit systems with...

Details Flow sharing priority circuit for open circuit systems with... Flow sharing priority circuit for open circuit systems with...

2005-08-23

2005-08-23

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

C091S516000

Reexamination Certificate

active

06931847

ABSTRACT:
A priority circuit is provided that is in communication with an open circuit pump and priority and auxiliary systems. The circuit comprises a first valve with an inlet in communication with the pump, an outlet in communication the priority system, and a load sensing inlet in communication with the priority system, wherein the first valve modulates to maintain a predetermined pressure differential between pressure at the load sensing inlet and pressure at the outlet. The circuit further comprises a second valve with an inlet in communication with the pump, an outlet in communication with the auxiliary system, and a load sensing inlet in communication with the priority system, wherein the second valve is normally closed and opens when pressure at the load sensing inlet of the second valve is less than pressure at the inlet of the second valve minus the predetermined pressure differential of the first valve.

REFERENCES:
patent: 4043419 (1977-08-01), Larson, et al.
patent: 4345614 (1982-08-01), Karlberg et al.
patent: 4993447 (1991-02-01), Camire
patent: 5460001 (1995-10-01), Kato et al.
patent: 5549361 (1996-08-01), Sorensen
patent: 5937645 (1999-08-01), Hamamoto
patent: 6367365 (2002-04-01), Weickert et al.

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