Back flow preventer and integral vacuum breaker
US5038814A · kind A · utility
13Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1990 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Jun 15, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7843
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A back flow preventer and vacuum breaker for use with a plumbing fixture in which the discharge may be moved to a position within a body of water includes a body having an inlet and an outlet, a chamber connecting the inlet and outlet and an air vent opening into the chamber. There is a first diaphragm positioned within the chamber which controls air flow through the vent. There is a second diaphragm positioned in the chamber which controls flow from the inlet into the chamber and includes an integral check valve extending into the outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.