Gear pump including introduction paths and return paths

Details Gear pump including introduction paths and return paths Gear pump including introduction paths and return paths

2011-07-12

2011-07-12

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Grooved abutting cylinder-rotating member end surfaces

Radial groove

C418S076000, C418S132000, C418S201100

Reexamination Certificate

active

07976297

ABSTRACT:
An intended purpose of this invention is to realize a gear pump suitable for delivery of high-pressure and high-viscosity fluids by using helical gears meshing with each other. For this purpose, the gear pump includes introduction paths for introducing the fluid from a discharge side toward shaft end sides of gear shafts to apply shaft ends of the gear shafts with fluid pressures counterbalancing axial thrusts produced by the helical gears.

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patent: 02-013185 (1990-01-01), None
patent: 08-014165 (1996-01-01), None
patent: 9-144668 (1997-06-01), None
patent: 2000-186679 (2000-07-01), None
patent: 2000-265974 (2000-09-01), None

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