公开(公告)号：US20170203397A1

公开(公告)日：2017-07-20

申请号：US15116988

申请日：2014-02-06

申请人： Tentec Limited

发明人： Michael Gethings ,  David Evans

IPC分类号： B23P19/06 ,  F16B31/04 ,  G01L1/12

CPC分类号： B23P19/067 ,  B25B29/02 ,  F16B31/043 ,  G01L1/12

摘要： A tensioner, typically hydraulic, for threaded members, the tensioner comprising: a base (4) and a piston (6) defining a pressure space (13) therebetween, the base (4) and piston (6) being arranged to be urged apart along an axis (17) upon introduction of a fluid into the pressure space (13); and a thread-engaging member (7), comprising a body portion (8) of the form of a sleeve and having a threaded interior (30) for engagement with a threaded member (2) and a piston engaging portion (9) carrying a protrusion; in which the piston (6) bears against the protrusion such that the piston (6) exerts a force on the protrusion when urged apart from the base (4) by the introduction of fluid into the pressure space (13); the tensioner further comprising a displacement sensor arranged to determining the relative position of the body portion of the thread-engaging member and the base, the displacement sensor comprising a first part (12) carried on the base (4) and a second part (11) carried on the body portion (8); typically the displacement sensor is a magnetic encoder.