Small volume prover
US5392632A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 1992 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Aug 12, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F25/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A small volume prover is disclosed which is compact and capable of obtaining highly reliable measurement, keeping a highly accurate base volume without being affected by temperature and pressure of fluid to be measured. The prover includes a cylindrical outer housing having a fluid inlet and a fluid outlet spaced apart from each other, a cylindrical measuring conduit having both open ends and first and second sets of fluid ports radially made in a wall thereof and coaxially mounted within the outer housing and an annular wall mounted between the outer housing and the measuring conduit at the position between the measuring conduit open end and the first set of ports thereof to form an upstream annular passage and a downstream annular passage. During proving preparation a piston is restrained by a piston actuator provided in the outlet-side end of the outer housing to permit the fluid to pass through the annular passage. At the time of measurement start, the piston is released to run and a valve actuator provided at the inlet side acts as a slide valve to closed the first sets of fluid holes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.