Litton Systems, Inc.

Carleton Life Support Systems Inc.

Sammy K Mickelson

Timothy Raleigh

Kelly M Coffield

Kevin G McCulloh

Dean A Cantrill

Gary Neal Byrd

Kevin P Hurley

Lyle Berkenbosch

Dale L Selhost

Scott H Harvey

Robert Francois

Bradley D Kreiner

A first aspect of the invention includes a multi-stage gas compressor having a central cam with a plurality of pistons operably connected to and radially extending from the central cam. The cam follower assemblies each include a roller element connected to a roller bracket which rides within and along a guide channel defines by facing grooves formed in housing end plates.

Radial cam-driven compressor and radial cam-driven compressor assemblies

A cam driven piston compressor includes one or more cams powered by a motor, the cams being adapted to rotate through 360 degrees, and one or more cam followers, each of which is in contact with one of the cams. The compressor also includes one or more pistons wherein each of the pistons is attached to one of the cam followers, one or more cylinders wherein each of the cylinders encloses one of the pistons, and a compressor head in contact with the cylinders.

Cam driven piston compressor

The present invention is directed to a flow rate selector having a high flow position and a low flow position. The flow rate selector has a flow selector knob having a web. The web has a flat surface. At least two seals are mounted on the flat surface of the web. A retaining piece has two orifices of differing cross-sectional areas. The flow selector knob is rotatable relative to the retaining piece such that at least one seal can be aligned with either of the orifices to prevent fluid flow there through while allowing fluid flow through the other orifice. Cover has conical outside diameter that seals against chamber in . This protects chamber from foreign particles.

Fluid flow rate selector

Oxygen concentrator used in home health care

A modular, pneumatically parallel arrangement of sieve beds for a pressure swing adsorption gas concentration apparatus is described. A manifold head structure having a plurality of ports, channels and components which are connected together forms the pneumatic circuit for the pressure swing adsorption process. The manifold structures are arranged so as to be simply connected together to modularly form a pressure swing adsorption apparatus of the desired capacity.

Modular, stackable pressure swing absorption concentrator

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Bettendort, IA, United States of America

Sammy K Mickelson