Dual action check valve with combined return and bypass passages

A combination includes a selectively driven fan and a bypass flow passage for bypassing the fan. The bypass flow passage communicates with a first check valve to allow air to flow from the bypass passage to a downstream location. A second check valve allows air driven by the fan to pass into a retur...

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Bibliographic Details
Main Author Hipsky, Harold W
Format Patent
LanguageEnglish
Published 04.12.2018
Subjects
ACTUATING-FLOATS
AIRCRAFT
ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT
AVIATION
BLASTING
COCKS
CONTROLLING
COSMONAUTICS
DEVICES FOR VENTING OR AERATING
ENGINEERING ELEMENTS AND UNITS
EQUIPMENT FOR FITTING IN OR TO AIRCRAFT
FLYING SUITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
NON-POSITIVE DISPLACEMENT PUMPS
PARACHUTES
PERFORMING OPERATIONS
PHYSICS
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
REGULATING
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
TAPS
THERMAL INSULATION IN GENERAL
TRANSPORTING
VALVES
WEAPONS
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Summary:A combination includes a selectively driven fan and a bypass flow passage for bypassing the fan. The bypass flow passage communicates with a first check valve to allow air to flow from the bypass passage to a downstream location. A second check valve allows air driven by the fan to pass into a return passage and return to an inlet of the fan in the event that the discharge pressure from the fan overcomes a spring force associated with the second check valve. A heat exchanger pack and an environmental control system for use on an aircraft, and a method are all also disclosed.
Bibliography:Application Number: US201313743373