Internal gear pump

Details Internal gear pump Internal gear pump

2005-05-10

2005-05-10

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Working chamber surface expressed mathematically

C418S177000, C418S166000, C074S462000

Reexamination Certificate

active

06890164

ABSTRACT:
A noise-reduced internal gear pump incorporating an inner rotor having an addendum formed by a smooth curve and a dedendum formed by a hypocycloid. The tooth profile of the outer rotor is determined by the following steps. The center Oi of an inner rotor1is revolved around the center Oo of the outer rotor so as to form a circle S having a diameter of 2e+t, where “e” is the amount of eccentricity between the inner and outer rotors and “t” is the maximum value of the interrotor clearance between the outer rotor and the inner rotor pressed against it. The inner rotor1is rotated on its axis 1
times while its center Oi makes one revolution in the circular orbit S, where “n” is the number of teeth of the inner rotor. The envelope of the group of the tooth profile-curves of the inner rotor formed by its revolution is used as the tooth profile of the outer rotor.

REFERENCES:
patent: 2389728 (1945-11-01), Hill
patent: 2421463 (1947-06-01), Noreyko
patent: 4673342 (1987-06-01), Saegusa
patent: 5813844 (1998-09-01), Hosono et al.
patent: 6244843 (2001-06-01), Kosuge
patent: 0 785 360 (1997-07-01), None
patent: 1 016 784 (2000-07-01), None
patent: 61-210281 (1986-09-01), None
patent: 61210281 (1986-09-01), None
patent: 61210283 (1986-09-01), None
patent: WO 9911935 (1999-03-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3385015