Gear pump and holding element therefor

Details Gear pump and holding element therefor Gear pump and holding element therefor

2004-03-25

2008-08-19

Denion, Thomas (Department: 3748)

Rotary expansible chamber devices

Working member has planetary or planetating movement

Plural working members or chambers

C277S640000

Reexamination Certificate

active

07413424

ABSTRACT:
The gear pump unit (100) comprises a pump cover (1), an internal rotor (16) mounted rotatably in a recess (9) of the pump cover (1) and formed in a rotationally fixed manner on a driven plug-in shaft (11), and an external rotor (19), which is rotatably mounted in the recess (9) of the pump cover (1) eccentrically relative to the axis of rotation (A) of the internal rotor (16). The external rotor (19) is in mesh with the internal rotor (16) only in a first angle-of-rotation range (α). In a second angle-of-rotation range (β) lying opposite the first angle-of-rotation range (α), the internal rotor (16) is in contact with an inner surface (25) of a web (23), which is disposed in the recess (9). The outer surface (26) is in contact with the external rotor (19). After closing of the recess (9) by a cover plate (27) fastened to the pump cover (1), an admission pressure chamber (21) and a low-pressure chamber (22) are therefore formed in the recess (9). A holding element (33), which is held in the pump cover (1), in the initial assembled state of the gear pump unit (100) holds the cover plate (27) at a fixed angle of rotation on the pump cover (1).

REFERENCES:
patent: 2132813 (1938-10-01), Wahlmark
patent: 2380783 (1945-07-01), Painter
patent: 2615399 (1952-10-01), Gay
patent: 2941439 (1960-06-01), Rapata
patent: 3315608 (1967-04-01), Eckerle
patent: 3779674 (1973-12-01), Eckerle et al.
patent: 3791779 (1974-02-01), Nelson
patent: 4276806 (1981-07-01), Morel
patent: 4344717 (1982-08-01), Merz
patent: 4978266 (1990-12-01), Becker et al.
patent: 5106225 (1992-04-01), Andre et al.
patent: 5259689 (1993-11-01), Arand et al.
patent: 5907891 (1999-06-01), Meyer
patent: 6231223 (2001-05-01), Zucar et al.
patent: 6355044 (2002-03-01), Hair
patent: 6862864 (2005-03-01), O'Banion et al.
patent: 7097405 (2006-08-01), O'Banion et al.
patent: 27 58 376 (1979-07-01), None
patent: 36 20 705 (1987-12-01), None
patent: 38 29 547 (1989-03-01), None
patent: 198 35 510 (2000-02-01), None

Affiliated with

Also associated with

Rating

Gear pump and holding element therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3994549