Circulator pump check valve
US5664939A · kind A · utility
8Cited by
11References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1995 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | Jul 31, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/4273
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An wet-rotor hydronic heating/cooling circulator in which a check valve is positioned at the inlet eye of the pump impeller, where it can easily be serviced by removing the circulator motor and impeller. The check valve is preferably in the form of a valve subassembly that is removably inserted into an opening at the eye.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.