Powerless back-flow prevention apparatus
US10151098B2 · kind B2 · utility
0Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2015 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | Nov 15, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7909
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
There is provided a powerless back-flow prevention apparatus comprising: a body having a sewage inlet at a front thereof, a sewage outlet at a rear thereof, and a length-wise sewage channel there between; a door pivotally coupled to the body at the rear thereof to open or close the outlet, wherein the door comprises: a number of floating members arranged spacedly with each other; and a guide disposed on the floating members to pivot upwards via the floating force to close the outlet, and to pivot downwards via a gravity in an absence of the sewage back-flow to open the outlet, and, then to guide the sewage from the outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.