Abstract: 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.

Abstract: 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.

Abstract: A heat exchanger (E) for systems having a heat generating furnace (F) includes at least one heat exchanging arm (10) formed from an inner (12) and an outer (14) concentric tube with an inner (16) and outer (18) passageway separated by a common wall (20). The inner concentric tube (12) has a first end (22) with a fluid flow outlet (24) for discharging an exhaust fluid (26) and a second end (28) with a fluid flow inlet (30) for receiving an input (32) of the exhaust fluid. The outer concentric tube (14) has a first end (34) with a fluid flow (36) inlet for receiving an input of an intake (38) fluid flow and a second end (40) with a fluid flow outlet (42) for discharging the intake fluid (38). The exhaust fluid (26) flows through the inner concentric tube (12) in a direction substantially opposite to the intake fluid flow (38) through the heat exchanger arm (10).

Abstract: 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 656 has conical outside diameter that seals against chamber in 654. This protects chamber 720 from foreign particles.

Abstract: 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 656 has conical outside diameter that seals against chamber in 654. This protects chamber 720 from foreign particles.

Abstract: 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.