Abstract: A compact pump has a uni-body, or alternately a two-part, housing of self-skinning foam construction for superior noise and vibration reduction, such as needed for medical nebulizer applications. The uni-body foam housing is formed by molding the housing around a pump assembly having special features designed to shield and space apart moving or sensitive internal components of the pump assembly from the foam during the insert molding process. The alternate two-part foam housing is assembled using a union ring having multiple barbed pins that fit into openings in mating faces of the two housing sections.

Abstract: A pump (16) has a clamshell housing (12, 14) with walls (34, 36, 46, 50, 52) that come together and seal to create chambers (22, 24) which contain a pressure difference relative to ambient pressure.