Butterfly bypass valve
US4361170A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1981 |
| Grant date | Nov 30, 1982 |
| Priority date | — |
| Expiry date | Feb 26, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86726
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A passenger vehicle heater core fluid flow system and bypass valve (10) therefor is disclosed having a butterfly valve member (24) rotatably mounted in a primary fluid passageway (14) and intermediate first (20) and second (21) fluid ports which fluidly communicate with the primary passage. Third (22) and fourth (19) ports are in fluid communication with the primary passageway and spaced at each end thereof. The first and third ports are connected to high and low pressure locations on the engine cooling system respectively. The fourth port is connected to the heater core inlet and the second port is connected to the heater core outlet. When the valve is in an open position, a pair of isolated parallel flow paths are defined by flow through the first and fourth ports and by flow through the second and third ports. In the closed position flow enters the first port and immediately exhausts from the third port without entering the heater core flow path, thereby preventing heat transfer to the heater core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.