Airflow flapper valve

Anti-reverse flow mechanism for centrifugal blowers

Apparatus to achieve passive damping of flow disturbances in a c

Axial flow turbine air economizer

Bidirectional pump with diaphragm operated valve for dishwasher

Bladed turbine pump with adjustable guide vanes

Blower and rotating wind deflector

Centrifugal pump device

Centrifugal pump having a slidable gate

Centrifugal pump having anti-clogging backflow prevention gate

Connection between vane arm and unison ring in variable area sta

Diffuser including a rotary stage

Directional changeover pump

Exhaust gas turbocharger

Fan blade, structures and methods

Fan closure flap

Fan shroud air door assembly

Flow regulator for a water pump

Hydro-surge bowl valve

Improvements in and relating to fans