Valve structure
US5787928A · kind A · utility
82Cited by
57References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 1995 |
| Grant date | Aug 4, 1998 |
| Priority date | — |
| Expiry date | May 3, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86871
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A valve has a housing and a component movable within the housing. The housing has first, second, third and fourth ports formed in it. The movable component has a first passageway formed in it. Movement of the movable component within the housing selectively connects the first port through the first passageway to the second port. The movable component is selectively movable to disconnect the first port and second port and to connect the second port through the first passageway to the third port. A second passageway is defined between the housing and the movable component. The fourth port is connected to the second passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.