Rotary expansible chamber devices – Interengaging rotating members – Like rotary members
Reexamination Certificate
2005-08-01
2010-10-05
Denion, Thomas (Department: 3748)
Rotary expansible chamber devices
Interengaging rotating members
Like rotary members
Reexamination Certificate
active
07806673
ABSTRACT:
A nonmetallic pump with a gear pump assembly having an adapter spool mounted to an electric motor. The pump assembly is designed to reduce manufacturing costs and to provide access for many service and maintenance tasks to be performed without breaking any of the pipe connections. The pump assembly also includes a splined shaft system and a lubricating fluid circulation system with spiral grooves located inside a pair of bearings disposed on opposite sides of the gear flights. The assembly also includes a replaceable precision liner that surrounds the gear flights to maintain a tight tolerance for optimal performance of the pump. Also, an O-ring disposed inside the front cover of the assembly provides for operation of the pump over a wide temperature variation with relatively loose manufacturing tolerances.
REFERENCES:
patent: 2528343 (1950-10-01), Davis
patent: 3881849 (1975-05-01), Commarmot et al.
patent: 4394562 (1983-07-01), Epstein et al.
patent: 4583924 (1986-04-01), Zenglein et al.
patent: 5012837 (1991-05-01), Zepp
patent: 5540569 (1996-07-01), Altham et al.
patent: 5704767 (1998-01-01), Johnson
patent: 5725362 (1998-03-01), Zepp et al.
patent: 5727933 (1998-03-01), Laskaris et al.
patent: 6010321 (2000-01-01), Forsythe et al.
patent: 6033193 (2000-03-01), Pieters et al.
patent: 6053718 (2000-04-01), Schmidt et al.
patent: 6158983 (2000-12-01), Harpole et al.
patent: 6761546 (2004-07-01), Schlipf et al.
patent: 2004/0105768 (2004-06-01), Cameron et al.
Muscarella Stephen B.
Pascoe Philip T.
Denion Thomas
Duff Douglas J.
Hodgson & Russ LLP
Pulsafeeder Inc.
LandOfFree
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 Gear pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gear pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4155524