Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
1999-08-25
2000-09-26
Briggs, William
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
2988802, 409132, F01C 108, B23C 318
Patent
active
061228249
ABSTRACT:
Fluid compressor or expander having a main rotor with discrete arched-helical flutes that have ruled surface roots that match the predominantly planar tips of the teeth of the associated gate rotors and provide effective fluid sealing as the gate rotor teeth sweep through the flutes of the main rotor during compressor or expander operation. The flutes can be readily and economically made by end milling, in which a first flute is milled with a minimized number of milling passes such as a first pass to make one arched-helical flank and a portion of the arcked-helical root of a first flute and a second pass to make the opposing arcked-helical flank and another portion of the arched-helical root of the first flute. Additional discrete flutes are made in a similar manner until the main rotor is completed.
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Briggs William
Ergenbright Erica
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