Pressure transfer unit
US3939872A · kind A · utility
7Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1973 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Oct 17, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7781
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pressure transfer unit having a movable partition including a flexible bellows for separating an internal, controlled-pressure chamber from a reference-pressure chamber. A valve is provided for limiting the volume of liquid that can be injected into and received in the controlled-pressure chamber during filling or refilling thereof. A spring biases the partition to apply a predetermined force to the partition and to shut off fluid transfer in the event of bellows failure. The unit is arranged for simple and rapid assembly and disassembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.