Title:
HYDRAULIC TORQUE IMPACT TOOL
Document Type and Number:
Japanese Patent JPS61192482
Kind Code:
A
Abstract:
A hydraulic torque impulse tool, comprising an inertia drive member (10) which is rotated by a motor and which includes a fluid chamber (19), and a seal and torque transmitting mechanism (30) which is arranged to divide the fluid chamber (19) into two compartments (38, 39) during a short interval of the relative rotation between the drive member (19) and the output spindle (11). An annular leaf spring valve (82) is arranged to control the flow through a bypass passage (70,81, 79) interconnecting the two fluid chamber compartments (38, 39). The leaf spring valve (82) which by its shape is pretensioned toward open condition automatically occupies the open condition as the difference in pressure between the fluid chamber compartments (39, 39) is low and a closed condition as this difference exceeds a certain level.
Inventors:
KUNUTO KURISUCHIAN SHIYOEPUSU
Application Number:
JP28587885A
Publication Date:
August 27, 1986
Filing Date:
December 20, 1985
Export Citation:
Assignee:
ATLAS COPCO AB
International Classes:
B25B21/02; B25B23/145; B25D15/02; (IPC1-7): B25B21/02; B25B23/145
Domestic Patent References:
| JPS5993269A | 1984-05-29 | |||
| JPS5338496U | 1978-04-04 |
Foreign References:
| US3283537A | 1966-11-08 |
Attorney, Agent or Firm:
Shigeru Yagida