192 clutches and power-stop control – Clutches – Torque responsive
Patent
1987-10-05
1989-06-06
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Torque responsive
81474, 173 12, 192150, F16D 4320
Patent
active
048363499
ABSTRACT:
A tightening apparatus includes a drive motor and a bit are coupled to each other by engagement of a clutch mechanism, the engagement thereof being maintained by a force of a spring one end of which is coupled to the clutch mechanism and the drive motor is released from engagement with the bit when the tightening torque of the bit exceeds a value corresponding to the force of the spring. The tightening apparatus comprises a cylinder and a plunger encased in the cylinder for holding the other end of the spring. The plunger is movable by a drive mechanism such that the force of the spring is varied, whereby the tightening force to be applied to the bit is adjustable in accordance with the position of the plunger as adjusted by the drive mechanism.
REFERENCES:
patent: 2683512 (1954-07-01), Boice
patent: 2702619 (1955-02-01), Andershock
patent: 3205986 (1965-09-01), Kramer
patent: 3442362 (1969-05-01), Bangerter
patent: 3710873 (1973-01-01), Allen
patent: 3960035 (1976-06-01), Workman et al.
patent: 4019589 (1977-04-01), Wallace
patent: 4265320 (1981-05-01), Tanaka et al.
Sakamoto Junshin
Suzuki Shun
Tsushima Akinori
Bonck Rodney H.
Hitachi Koki Company Ltd.
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