Gas cylinder residual gas volume indicator
US8171784B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 2009 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Aug 13, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF17C2270/0745
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A gas cylinder residual gas volume indicator includes a carrier having a weight-receiving part and a pressure-applying part, a hydraulic cylinder having a cylinder body holding a hydraulic fluid and a cylinder piston stopped against the pressure-applying part of the carrier and movable with the pressure-applying part relative to the cylinder body to force the hydraulic fluid out of the cylinder body according to the weight received from a gas cylinder by the weight-receiving part, a hydraulic mechanical type meter having an index rotatable by a hydraulic fluid, and an oil pipe for guiding the hydraulic fluid out of the hydraulic cylinder into the meter to rotate the index.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.