Vacuum controller
US4795131A · kind A · utility
16Cited by
24References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1986 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Oct 24, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86791
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A vacuum controller for controlling the vacuum at a controlled vacuum which includes a balanced piston arrangement coupled to a valve piston reciprocal with respet to a valve seat positioned between the controlled vacuum and a high header or source vacuum. A throttling of the header vacuum takes place across the space between the valve piston and valve seat and is such that the header vacuum does not influence the movement of the valve piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.