Apparatus for testing the surface quality of a vessel mouth
US4055985A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1976 |
| Grant date | Nov 1, 1977 |
| Priority date | — |
| Expiry date | Dec 9, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B13/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for testing the surface quality of a vessel mouth including a test head adapted to be placed over the vessel mouth, a line connecting the test head to a supply of test gas, a passageway through the test head for introducing gas into the vessel, and a pressure measuring instrument connected to the gas line for generating an electrical signal when a pressure change of a predetermined tolerance value occurs. A sealing washer of spring stiffness is mounted on the test head for bearing against the vessel mouth and a valve is provided in the test head to open the passageway when the washer is pressed against the vessel and to close the passageway when the test head is removed from the vessel. In addition, the sealing washer and valve may be pivotable and means for generating a fault signal may be provided for generating a signal when the washer has been pivoted a predetermined amount.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.