Rotary expansible chamber devices – Interengaging rotating members – Helical or herringbone
Patent
1998-01-20
2000-02-01
Denion, Thomas
Rotary expansible chamber devices
Interengaging rotating members
Helical or herringbone
4182011, 418194, F01C 116
Patent
active
06019586&
ABSTRACT:
A screw compressor or pump includes: a housing, two intermeshing rotors respectively rotatably mounted in the housing by two shafts; each rotor having a helix tooth spirally formed on the rotor lengthwise, with the helix tooth gradually decreasing an outer diameter of a top land surface of the helix tooth corresponding to a gradually contracted rotor chamber, and having a spiral groove juxtapositioned to the helix tooth and spirally formed in the rotor lengthwise; the spiral groove having a groove bottom surface extrapolatively defining an inner cone tapered towards a suction port side; the rotor chamber having a conical wall surface extrapolatively defining an outer cone tapered towards a discharge port side, thereby forming a gradationally contracted cavity between the spiral groove and the conical wall surface of the rotor chamber as confined between the inner and outer cones for increasing the compression or pumping efficiency.
REFERENCES:
patent: 1423768 (1922-07-01), Holdaway
patent: 4405286 (1983-09-01), Studer
patent: 4952125 (1990-08-01), Nagai
patent: 4964790 (1990-10-01), Scott
patent: 5393209 (1995-02-01), Mohr et al.
patent: 5533887 (1996-07-01), Maruyama
Denion Thomas
Sunny King Machinery Co., Ltd.
Trieu Thai-Ba
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