Title:
【発明の名称】加力装置
Document Type and Number:
Japanese Patent JPH03500268
Kind Code:
A
Abstract:
PCT No. PCT/AU88/00381 Sec. 371 Date May 7, 1990 Sec. 102(e) Date May 7, 1990 PCT Filed Sep. 29, 1988 PCT Pub. No. WO89/02807 PCT Pub. Date Apr. 6, 1989.A hydraulic nut (20) for tensioning a bolt (232) is disclosed having a stepped annular piston (22) slidable within a housing (21) for reducing the complexity of manufacture. The locking collar (27) is threaded to the housing (21) on a buttress thread (28) to minimize distortion due to thread loads and locks against the piston (22) instead of the clamped article for minimizing tensile relaxation during transfer of load from the hydraulic tensioner to the locking collar (27).
Inventors:
Bucknell, John Wentworth
Application Number:
JP50811188A
Publication Date:
January 24, 1991
Filing Date:
September 29, 1988
Export Citation:
Assignee:
Bucknell, John Wentworth
International Classes:
B25B29/02; F16B31/04; (IPC1-7): B25B29/02
Domestic Patent References:
| JPS6013522U | 1985-01-29 | |||
| JPS6170214A | 1986-04-11 | |||
| JPS4712375B1 | ||||
| JPS556076A | 1980-01-17 | |||
| JP55134100B |
Attorney, Agent or Firm:
Nobuyuki Iida