Pulse valve
US4669660A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1986 |
| Grant date | Jun 2, 1987 |
| Priority date | — |
| Expiry date | Jan 13, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C5/0225
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A pulse valve having a valve body with a valve nozzle, a valve seat and a valve stem with a closing piece movably disposed in axial alignment with the valve seat for operating the valve and a valve drive including a stack of piezoelectric crystals arranged concentrically around the valve stem for operating the valve, the stack of piezoelectric crystals being supported by thermally and electrically insulating support members and being enclosed in a drive housing provided with means permitting evacuation thereof, the valve drive being separated from the valve body by a membrane mounted to the valve stem at the interface of the valve stem and forming a seal between the drive and the valve body to permit evacuation of the housing. The valve nozzle is provided with replaceable nozzle members with different nozzle openings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.