Patent ID: 11891959
Assignee: ROLLS-ROYCE PLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 6:
7. The fuel control system of claim 1, wherein the first stage unit further comprises:
a fluid chamber at least partially receiving the movable member therein;
a first chamber port fluidly communicating with the fluid chamber, wherein the movable member is configured to close the first chamber port in the first end position;
a second chamber port fluidly communicating with the fluid chamber, wherein the movable member is configured to close the second chamber port in the second end position;
a third chamber port fluidly communicating with the fluid chamber, wherein the third chamber port is open irrespective of a position of the movable member;
a first input port configured to receive a high pressure fuel flow from the supply line and fluidly connected with each of the first chamber port and the second chamber port;
a second input port configured to receive a low pressure fuel flow from a low pressure line and fluidly connected to the third chamber port;
a first output port fluidly connected to the first chamber port; and
a second output port fluidly connected to the second chamber port.