Machines (apparatus and instruments) for the controlled feeding of materials, be such materials in liquid, gaseous or particulate (powders, flakes, granules, chips or pellets) form, including: pumps as are included in this Class, including metering pumps, vacuum pumps (machines), horizontal and vertical single and multi-stage rotary and centrifugal pumps, glandless pumps including canned motor and magnetic drive centrifugal and rotary pumps, diaphragm and tubular diaphragm pumps, chemical pumps including horizontal and vertical single and multi-stage pumps, gear pumps, slurry pumps, submersible drainage effluent and sewage pumps; flow rate controllers; volumetric and gravimetric controlled feeders and blenders for dry chemicals, pharmaceuticals, food products and plastics material products; single and multi-auger feeding machines; valves, being parts of machines, including pressure reducing valves; compressors (machines); blowing machines for the compression, exhaustion and transport of gases; blowing machines for the compression, sucking and carrying of grain; blowing machines for the exhaustion of dust; materials conditioning machines (apparatus and instruments) as are included in this Class, including apparatus and instruments for the controlled feeding, at substantially constant or uniform density, of particulate material; and parts of and accessories for the aforementioned goods as are included in this Class, including agitators, alternators, bearings for transmission shafts, brushes (parts of machines), clutches other than for land vehicles, crank shafts, crank cases for machines, motors and engines, cranks (parts of machines), filters (parts of machines or engines), gear boxes other than for land vehicles, transmission shafts other than for land vehicles, bearings for transmission shafts, transmissions for machines