Abstract: An apparatus and method for removing support material from and/or smoothing surfaces of an additively manufactured part (the “AM part”) is disclosed. The apparatus may include a chamber, a support surface within the chamber, one or more nozzles within the chamber, a tank positioned below the nozzles, and a diverter positioned between the nozzles and the tank. The support surface may be configured to support the AM part and may have one or more openings configured to allow the fluid to pass through the opening(s). The nozzles may be configured to spray a fluid at the AM part, and the spray may be an atomized or semiatomized spray of the fluid. The diverter comprises an umbrella or a diverter shield and diverts sprayed fluid from directly impacting the fluid being collected in the tank, whereby foaming of the fluid in the tank is reduced.

Abstract: An oxygen concentrator for delivering consistent doses of an oxygen concentrated gas to a user by adjusting the delivery time according to the ambient air pressure at the time of delivery.

Abstract: A compact and highly portable combination pressure swing adsorption apparatus and product gas conservation device for medical use, to produce efficiently a gas with a high concentration of oxygen and to deliver the oxygen concentrated gas to a user at selectable times and in selectable doses, in which the operating components are detachably mounted together as a single unit.

Abstract: An oxygen concentrator for delivering consistent doses of an oxygen concentrated gas to a user by adjusting the delivery time according to the operating pressure and/or temperature of the gas at the time of delivery.