Poppet valve having external adjustment for a flow restrictor
US5358212A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 1993 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Oct 8, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB08B2230/01
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A poppet valve has a flow restrictor downstream of the poppet which is externally adjustable by rotation of the poppet valve stem. The restrictor is in the form of a throttle ring threadedly mounted on a valve guide and the throttle ring has a diameter less than that of the valve port sealed by the poppet so that the assembly of the throttle ring is removable through the valve port while inadvertent removable is prevented by projecting cap screws on the throttle ring extending to a diameter greater than that of the valve port. The valve poppet is also provided with a contour area adjacent the seat which provide a restriction after initial opening movement of the poppet to minimize erosive wear on the poppet sealing surfaces when the pressure drop occurs adjacent these surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.