Flow controller, parts of flow controller, and related method
US5901741A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1997 |
| Grant date | May 11, 1999 |
| Priority date | — |
| Expiry date | Oct 2, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87354
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mass fluid flow controller has a valve which is controlled by a controller rod structure which is substantially pivotally mounted on a metallic diaphragm which stretches and unstretches with the movement of the rod structure. In the relationship between the controller rod structure and a ball which acts as a gate-member for the valve, an elongated stem rod having a sleeve about it may be used in fixing the ball to the controller rod structure. The stem rod may be mounted by fixing it to the elongated sleeve, a distance from the gate-member side of the controller rod structure that is substantially greater than the distance of the position of the ball from the gate-member side of the controller rod structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.