Orifice fitting with venting passage and injection seal
US5464036A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1994 |
| Grant date | Nov 7, 1995 |
| Priority date | — |
| Expiry date | Feb 9, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6113
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An orifice fitting for measuring the flow of gas through a pipeline in which the orifice fitting has a body including a pair of opposing body plates that define a body chamber. Passing through both body plates is an aligned flow passage for attachment to a gas pipeline. One of the body plates includes an access opening that is selectively covered and sealed by a hatch. A carrier having a carrier chamber is movably positioned within the body chamber so that the carrier chamber can be selectively aligned with the flow passage or the access opening. Removably positioned within the carrier chamber is an orifice disk having an orifice of a predetermined size through which gas can flow when the carrier chamber is aligned with the flow passage. The carrier chamber is sealed from the body chamber by seal rings positioned on opposing sides of the carrier and biased against the body plates. When the carrier chamber is aligned with the access opening, an annular injection groove positioned on each sealing ring communicates with respective injection passages extending through the body plates, thereby permitting a sealant to be injected into the injection groove for emergency sealing of the car…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.