Two stage sewage grinder pump
US7357341B2 · kind B2 · utility
11Cited by
3References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2004 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Oct 14, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/607
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A two-stage sewage grinder pump (10) having two impellers (30, 32) and a grinder (60) attached to the motor shaft (24). Preferably, both impellers are vortex impellers and are positioned between the grinder and the motor. The motor housing includes a discharge conduit (70) that is monolithic with the motor housing (20). An anti-siphon valve (71) is integral with the discharge conduit. An integral discharge flange (75) and check valve (78) are attached to the discharge conduit to connect the sewage grinder pump to a sewage outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.