An air pump including an outer housing and an inner housing positioned within the outer housing, the inner housing and outer housing defining an air conduit therebetween, a motor positioned within the inner housing, a vane occupying a majority of the fluid conduit, and an impeller positioned within the fluid conduit and connected to the motor. The outer housing is adapted to couple to an inflatable bladder. In some embodiments, a majority of the pump and a valve assembly is positioned within the bladder.

 
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< Process for assembly of an electric pump, and a vibration damper for such a pump

< Reciprocating compressor with vibration reducing plate

> Enclosed-configuration electrically powered compressor having electric motor with stator coil thereof cooled by flow of refrigerant prior to compression of the refrigerant

> Pump having air valve with integral pilot

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