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US 12,071,898 B2Granted
Fluid pump systems
AssigneeHamilton Sundstrand Corporation
InventorAdrian L. Stoicescu
Life of this patent
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Abstract
A multi-stage fluid pump system can include a first stage configured to provide a first pressure and a second stage configured to provide a second pressure. The pump system can be configured to prevent output of the second stage in a first stage mode such that only the first pressure is output from the first stage and second stage and to allow output of the second stage in a multi-stage mode such that there is a combined pressure output from the first stage and the second stage.
Claims16
A multi-stage fluid pump system, comprising:
- a first stage configured to provide a first pressure;
- a second stage configured to provide a second pressure,
- wherein the first stage is upstream of the second stage,
- wherein the pump system is configured to:
- prevent output of the second stage in a first stage mode such that only the first pressure is output from the first stage and second stage;
- allow output of the second stage in a multi-stage mode such that there is a combined pressure output from the first stage and the second stage;
- and
- a first check valve disposed downstream of the first stage at a first stage outlet between the first stage and a main discharge line;
- wherein the first stage and the second stage are driven by a common shaft, wherein the system further comprises an ejector pump in fluid communication between the first stage and a main inlet line.
6 more elements
A fuel system for an aircraft, comprising:
- a multi-stage fluid pump system, comprising:
- a first stage configured to provide a first pressure;
- a second stage configured to provide a second pressure, wherein the first stage is upstream of the second stage, wherein the pump system is configured to:
- prevent output of the second stage in a first stage mode such that only the first pressure is output from the first stage and second stage;
- and
- allow output of the second stage in a multi-stage mode such that there is a combined pressure output from the first stage and the second stage;
- and
- a first check valve disposed downstream of the first stage at a first stage outlet between the first stage and a main discharge line, wherein the first stage and the second stage are driven by a common shaft, wherein the system further comprises an ejector pump in fluid communication between the first stage and a main inlet line.
5 more elements
Dependencies are inferred from the claim text.