Pump for hot and cold fluids
US5797734A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Nov 26, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C11/001
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A gear-type pump having an inner rotor and an outer rotor and in which the outer rotor is supported for rotation by a plurality of roller bearings interposed between a support housing and the outer rotor and in which the inner and outer rotors and the support housing are made of the same material and have essentially the same width dimension so that the thermal contraction of the support housing and the thermal contraction of the inner and outer rotors while pumping super-cooled fluid does not adversely affect the end-clearance between the end plates and the inner and outer rotors to an extent where the efficiency of the pump would differ if it were pumping fluid at a temperature of 70 degrees Fahrenheit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.