Closure head for a hydraulic tube-testing bench
US4766934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1987 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Aug 10, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/022
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A closure head (2) for a hydraulic tube-testing bench includes a head body (4) including a first bore (5) into which one end of a tube (1) may be freely inserted. A second bore (11) of larger diameter than the first bore has a resilient sealing ring (10) inserted at the end thereof. A fluid under pressure is conveyed into a chamber (40) constituted between the outer periphery of the sealing ring and the second bore enabling the sealing ring to be contracted against the tube. The sealing ring is prevented from moving axially on its side furthest from the end of the tube by an annular series of thrust sectors (13) which are independent from said sealing ring. The sectors are clamped against the tube while also enabling them to be retracted away therefrom. The sectors are axially retained on their sides furthest from said sealing ring. The closure head is characterized in that axial retaining of the thrust sectors is achieved by comprise a packing press (18) fixed to the head body, and a rubbing plate (19) in contact with the packing press and which includes a circular peripheral rim (20) which engages, when the thrust sectors are in the retracted position, in a groove (21) provided i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.