Vacuum breakers
US4064896A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 1976 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Jan 19, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/3331
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vacuum breaker, capable of preventing undesired reverse flow of water, includes a hermetically-sealable housing provided with inlet and outlet couplings at its respectively opposite ends. The housing defines a chamber within which is a first valve seat near the inlet coupling and a first valving member disposed in the path of flow between the couplings and cooperative with the first valve seat to block flow from outlet toward inlet. A second valve seat is disposed adjacent to the outlet opening and provides communication between the chamber and the housing exterior. A second valving member is in a position exclusive of the flow path between the inlet and outlet couplings through the first valve seat and serves to selectively block communication between the chamber and the exterior.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.