Method and apparatus for measuring the pressure of a fluid
US4711127A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1986 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Mar 21, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/0089
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring gas pressures including a piston slideably guided in a cylinder, at least one of the gas pressures acting on one of the two face surfaces of the piston the piston face forming a pressure chamber with the interior of said cylinder. Hydrostatic bearings are provided between the piston and the cylinder for relative movement therebetween essentially without friction. Hydrostatic liquid to hydrostatic bearings, at least one receptable connected to said pressure chamber for receiving any hydrostatic liquid penetrating from said hdyrostatic bearings into the pressure chamber. Provision is made for maintaining the hydrostatic liquid in the receptacle at a predetermined level, as well as for removing hydrostatic liquid from the receptacle under control of a level maintaining element and a force measuring element engaging the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.