The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 1988
Filed:
Aug. 10, 1987
Bernard Ollivaud, Launay le Cellier, FR;
Philippe Blot, Nantes, FR;
Alsthom, Paris, FR;
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 in the periphery of the thrust sectors.