Title:
TENSIONING DEVICE
Document Type and Number:
Japanese Patent JP3542627
Kind Code:
B2
Abstract:
PURPOSE: To improve leakage of fluid by enhancing a sealing function between an annular cylinder and an annular piston in a hydraulically actuating tensioning device.
CONSTITUTION: A hydraulically actuating nut 16 includes an annular cylinder main body 24 forming an annular space extending in the axial direction on one end surface, an annular piston main body 25 forming sliding fit on the inside by extending in the space and defining a liquid chamber 29 together with the cylinder main body, elastic seal means 30, 31 protrusively formed from one end of the piston main body 25 sliding on wall surfaces 22, 23 of the cylinder main body 25, a locking part 32 and a duct means 35 supplying liquid to the chamber. An end part of a locking ring close to the cylinder main body 24 forms a recessed part so that the cylinder main body 24 can slide inward in the radial direction on the locking ring when transmitting an axial direction load, and imparts a surface inclined inward in the radial direction to an end surface of the cylinder main body 24.
Inventors:
Harry David Percival-Smith
Application Number:
JP1286094A
Publication Date:
July 14, 2004
Filing Date:
February 04, 1994
Export Citation:
Assignee:
Hydra-Tight Limited
International Classes:
B66F3/26; B23P19/06; F16B31/04; (IPC1-7): F16B31/04; B66F3/26
Domestic Patent References:
| JP63135607A | ||||
| JP61070214A | ||||
| JP1182614A | ||||
| JP4002702U |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Toru Mori
Kenji Kaneko
Hajime Asamura
Toru Mori
Kenji Kaneko