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1. 发明专利

JPH01262380A SEALING DEVICE 失效
公开(公告)号：JPH01262380A
公开(公告)日：1989-10-19
申请号：JP27286288
申请日：1988-10-28
申请人： FURAMO DEV U K LTD
发明人： FURANKU MOON
IPC分类号： F04B39/00 , F16J15/16 , F16J15/40
摘要： PURPOSE: To obtain highly reliable sealing effect lasting for a long term by providing an apparatus for generating a predetermined fluid pressure in a chamber positioned between a driving part and a driven part along with reciprocation of a reciprocation member mounted in a space of a cylinder or the like. CONSTITUTION: In a piston 10 mounted in a cylinder 20, a movable annular driving part 70 is fit between a head portion 12 having a large diameter and an annular flange 16 at the end of a stem 14 extending from the head portion 12, and is biased by a coil spring 40 to a side against the piston 10. A first sealing 32 and a second sealing 34 are mounted to an outer face 73 of the annular driving part 70 and an outer face of the stem 14, respectively. The driving part 70 is constructed to a rotor comprising a rotor winding 50 of a linear electric motor, and works in association with a stator winding (not shown) provided to the cylinder 20. Further, in the driving part 70, a passage 76 is formed to axially pass through the driving part 70, and a check 60 is disposed in the passage 76.

2. 发明专利

JPH0643790B2 失效
公开(公告)号：JPH0643790B2
公开(公告)日：1994-06-08
申请号：JP15660588
申请日：1988-06-24
申请人： FURAMO DEV U K LTD
发明人： FURANKU MOON
IPC分类号： E21B7/06 , E21B17/00 , E21B17/02 , E21B17/18 , E21B23/00 , E21B23/14 , E21B33/08 , E21B47/01 , F16L25/01 , E21B47/12

3. 发明专利

JPH0197792A PIPE ASSEMBLY HAVING CONDUCTIVE STRUCTURE 失效
公开(公告)号：JPH0197792A
公开(公告)日：1989-04-17
申请号：JP15660588
申请日：1988-06-24
申请人： FURAMO DEV U K LTD
发明人： FURANKU MOON
IPC分类号： E21B7/06 , E21B17/00 , E21B17/02 , E21B17/18 , E21B23/00 , E21B23/14 , E21B33/08 , E21B47/01 , F16L25/01
摘要： PURPOSE: To facilitate handling operations and to achieve high-quality electric conduction by supporting pipe-shaped conducting means in such a way as to be concentrically extended with respect to other pipe elements. CONSTITUTION: Pipe-shaped conducting means 12, 12 are supported in such a way as to extend concentrically with respect to other pipe elements 21, 22 inside a pipe assembly 20 which constitutes a production pipe system or a drill pipe system. At their connection, a pipe element 1 for insertion is placed between standard pipe elements 21, 22 and their respective threaded parts 24, 25 are threadably engaged to ensure an electrical connection therebetween. Therefore the conducting means 12, 12 provide high-quality electrical conduction and the other pipe elements 21, 22 can be made to work as the liners of the conduction means 12, 12.

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