Multi-stage helical screw rotor

Rotary expansible chamber devices – Interengaging rotating members – Helical or herringbone

Reexamination Certificate

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Details

C418S201100, C418S009000, C418S003000

Reexamination Certificate

active

07074026

ABSTRACT:
A vacuum pump includes an inlet port (14) and an exhaust port (86, 88). Gas from an enclosure connected to the inlet port is pumped to the exhaust port by first and second rotors (18, 52, 254) which are mounted on first and second shafts (30, 60) extending through a pump chamber (112). The rotors are connected with shaft sections (140, 150, 240, 250) which include a lobe (142, 172, 242, 242′) extending from the shaft sections and a mating channel (152, 182, 252, 252′) defined in the other. The lobes matingly engage the channels during rotation of the rotors to form a suction section (154). The suction section (154) compresses a volume of gas entering the pump from the inlet port (14) reducing the power consumed to move the volume of gas through the pump chamber more easily and increase pump efficiency.

REFERENCES:
patent: 1738602 (1929-12-01), Mocigemba
patent: 2410172 (1946-10-01), Lysholm
patent: 3667879 (1972-06-01), Cerpelli
patent: 4504201 (1985-03-01), Wycliffe
patent: 4792294 (1988-12-01), Mowli
patent: 5348453 (1994-09-01), Baran et al.
patent: 5393209 (1995-02-01), Mohr et al.
patent: 5549463 (1996-08-01), Ozawa
patent: 5624249 (1997-04-01), Rohlfing
patent: 5674063 (1997-10-01), Ozaki et al.
patent: 5836754 (1998-11-01), Ozaki et al.
patent: 5846066 (1998-12-01), Troup
patent: 6129533 (2000-10-01), Brandt et al.
patent: 1142108 (1963-01-01), None
patent: 0697523 (1996-02-01), None
patent: 0937895 (1999-08-01), None
patent: 763458 (1934-05-01), None
patent: 242652 (1926-02-01), None
patent: 430601 (1935-06-01), None
patent: 552562 (1943-04-01), None
patent: 295288 (1932-04-01), None
patent: 57046083 (1982-03-01), None
patent: 60249689 (1985-12-01), None
patent: 02-108888 (1990-04-01), None
patent: 04370379 (1992-12-01), None
Translation of Japanere Patent JP04-370379.

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