Agitating – Rubber or heavy plastic working – With specified discharge means
Reexamination Certificate
2008-04-08
2008-04-08
Cooley, Charles E. (Department: 1797)
Agitating
Rubber or heavy plastic working
With specified discharge means
C366S272000
Reexamination Certificate
active
07354188
ABSTRACT:
The invention relates to a gear pump which is suitable for delivering highly viscous materials. The aim of the invention is to provide a gear pump having a low-wear and low-maintenance bearing system, high output and good self-cleaning properties. For this purpose, the gear pump according to the invention comprises a housing, a gear section comprising a sun wheel and a plurality of stationarily mounted planet wheels, an input screw section comprising an input screw shaft linked with the sun wheel in a rotationally fixed manner and an input transfermix area, and an output screw section comprising an output screw shaft linked with the sun wheel in a rotationally fixed manner and an output transfermix area. The screw shafts, in the transfermix areas, have flight depths that decrease toward the gear section. In the housing, flights are configured which extend in an opposite direction relative to the screw shafts, which have increasing diameters towards the gear section and which end each between the planet wheels.
REFERENCES:
patent: 2767437 (1956-10-01), Marshall
patent: 2785438 (1957-03-01), Willert
patent: 4289409 (1981-09-01), Brand
patent: 4303344 (1981-12-01), Mueller
patent: 4336213 (1982-06-01), Fox
patent: 4642040 (1987-02-01), Fox
patent: 5153009 (1992-10-01), Voigt
patent: 5215374 (1993-06-01), Meyer
patent: 5267847 (1993-12-01), Bohm et al.
patent: 5304054 (1994-04-01), Meyer
patent: 5310256 (1994-05-01), Boden
patent: 5378415 (1995-01-01), Gohlisch et al.
patent: 6264447 (2001-07-01), Woodcock
patent: 6286988 (2001-09-01), Hasse
patent: 6468067 (2002-10-01), Ikegami
patent: 6531079 (2003-03-01), Hepke
patent: 6799881 (2004-10-01), Fischer
patent: 6974310 (2005-12-01), Uphus
patent: 7040870 (2006-05-01), Nicolas et al.
patent: 7290923 (2007-11-01), Fischer et al.
patent: 2005/0220919 (2005-10-01), Fischer et al.
patent: 2007/0104815 (2007-05-01), Uphus
patent: 29 05 717 (1980-08-01), None
patent: 3133647 (1983-03-01), None
patent: 100 49 730 (2002-04-01), None
patent: 101 50 627 (2003-05-01), None
patent: 102 52 368 (2003-05-01), None
patent: 0 642 913 (1995-03-01), None
patent: 1801418 (2007-06-01), None
patent: 11-198214 (1999-07-01), None
patent: 2006247917 (2006-09-01), None
patent: 1537560 (1990-01-01), None
patent: WO 00/53390 (2000-09-01), None
patent: WO 2005039859 (2005-05-01), None
International Search Report dated Feb. 7, 2005 including PCT/ISA/237 (Twelve (12) pages).
Skibba Olaf
Uphus Reinhard
Berstorff GmbH
Cooley Charles E.
Crowell & Moring LLP
VMI - AZ Extrusion GmbH
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