Vacuum control valve for automotive heating and airconditioning systems
US4448390A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1983 |
| Grant date | May 15, 1984 |
| Priority date | — |
| Expiry date | Jan 3, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86879
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vacuum control valve comprising a body having a valve surface with a plurality of valve ports extending through the body from such surface, a soft resilient valve member having a control surface slidable along the valve surface and formed with passage means for selectively establishing communication with the valve ports, a movable carriage for receiving and supporting the valve member, and means for moving the carriage along a path substantially parallel with the valve surface, the soft resilient valve member having a soft resilient compressible rear portion formed integrally with such valve member on the opposite side thereof from the control surface, the valve member being confined between the carriage and the valve surface with such soft resilient compressible rear portion in a compressed condition for exerting resilient pressure between the control surface of the valve member and the valve surface of the body, the soft resilient compressible rear portion comprising a pattern of fins alternating with recesses on the valve member, such fins engaging the carriage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.