Pump or blower, in particular for heating and air-conditioning systems
US4392777A · kind A · utility
Inventor
Key dates
| Filing date | Jan 12, 1981 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Jan 12, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F3/044
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump or blower device particularly for heating and air conditioning systems is provided with a plurality of inlet ports and a plurality of outlet ports. Axially displaceable impeller means are moved to connect any one inlet port selectively with a first outlet port or with a second different outlet port or with a plurality of outlet ports simultaneously. The device is of great advantage in controlling the circulation of heating or cooling fluids between a primary circuit and secondary circuits that branch out to provided heating or cooling in selected separate areas of a building or to a plurality of buildings serviced by the primary circuit. The present device decreases the number of pumps and mixing valves in the systems and results in decreasing installation and operating costs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.