Screw pump

Details Screw pump Screw pump

2007-01-24

2008-11-18

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Interengaging rotating members

Three or more

C418S201100

Reexamination Certificate

active

07452194

ABSTRACT:
A pump including at least three rotors each being provided with a generally helical screw thread, the rotors being mounted for rotation in a housing such that the screw threads of the rotors mesh and rotation of one rotor causes rotation of the other rotor, wherein the pitch of the threads is less than 1.6 times the outer diameter of the rotors or where one of the rotors has a larger outer diameter than the other rotors the outer diameter of the larger diameter rotor.

REFERENCES:
patent: 630648 (1899-08-01), Brewer
patent: 2231357 (1941-02-01), Burghauser et al.
patent: 2455022 (1948-11-01), Schmidt
patent: 2481527 (1949-09-01), Nilsson
patent: 2588888 (1952-03-01), Sennet
patent: 2590560 (1952-03-01), Montelius
patent: 2652192 (1953-09-01), Chilton
patent: 2693763 (1954-11-01), Sennet
patent: 3063379 (1962-11-01), Montelics
patent: 3291061 (1966-12-01), Shinohara
patent: 3519375 (1970-07-01), Sennet
patent: 3574488 (1971-04-01), Vanderstegen-Drake
patent: 3773444 (1973-11-01), Koch
patent: 3814557 (1974-06-01), Volz
patent: 6158996 (2000-12-01), Becher
patent: 6312242 (2001-11-01), Fang et al.
patent: 6623262 (2003-09-01), McKeithan et al.
patent: 7232297 (2007-06-01), Beaven et al.
patent: 7234925 (2007-06-01), Beaven et al.
patent: 1004930 (1957-03-01), None
patent: 3718863 (1988-12-01), None
patent: 1008755 (2000-06-01), None
patent: 906430 (1962-09-01), None
patent: 909922 (1962-11-01), None
patent: 914658 (1963-01-01), None
patent: 954426 (1964-04-01), None
patent: 2352777 (2001-02-01), None
European Search Report issued in connection with corresponding European patent application EP 04 01 0909.
United Kingdom Search Report issued in connection with priority application GB 0310591.3.
United Kingdom Search Report issued in connection with priority aplication GB 0310592.1.

Affiliated with

Also associated with

Rating

Screw pump does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Screw pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Screw pump will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4024946