Pressurized density measuring apparatus
US4374474A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1981 |
| Grant date | Feb 22, 1983 |
| Priority date | — |
| Expiry date | Mar 9, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N9/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fluid density measuring apparatus for measuring the density of a fluid in a pressurized state. The apparatus includes a balance arm, a fulcrum for supporting the balance arm, a balance weight slidably disposed on the balance arm, and a pressurizable container disposed on the balance arm for holding a fluid sample. A valve is connected to the pressurizable container for allowing pressurized fluid to flow into the container and for retaining the fluid in the container under pressure. A pump is provided for supplying pressurized fluid to the valve. The pump includes a pump body having a cylindrical bore disposed therein and an outlet port for communicating the bore with the valve. The pump also includes a rotatable piston member, threadedly engaged with the pump body, for pressurizing fluid contained in the bore of the pump body upon rotation of the piston member relative to the pump body. One alternative embodiment is suitable for both pressurized and non-pressurized fluid density measurements. A second alternative embodiment incorporates the pump in a threaded cover for the container, thereby eliminating the valve member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.