Screwdriver with switch-off means for screw-in depth and screw-i

Details Screwdriver with switch-off means for screw-in depth and screw-i Screwdriver with switch-off means for screw-in depth and screw-i

1990-05-25

1992-03-10

Yost, Frank T.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

173 15, 173 29, B25B 2300, B25B 23157

Patent

active

050941330

ABSTRACT:
To improve a power-operated screwing tool machine comprising a drive arranged in a housing, a screwing tool and a switch-off means for the screw-in depth including a depth stop held on the housing for fixing a screw-in depth and a clutch arranged between the drive and the tool drive shaft and transferrable by axial displacement of the tool drive shaft from a position of rest in the direction of the drive into a working position, the clutch comprising a clutch element driven by the drive, a clutch element connected to the tool drive shaft and an intermediate clutch element arranged between these clutch elements, with the intermediate clutch element forming with a first one of the clutch elements an entrainment clutch and with the second clutch element a release clutch, such that in addition to a switch-off means for the screw-in depth, the screwing tool machine comprises a switch-off means for the screw-in torque, it is proposed that the switch-off means for the screw-in depth be adapted to be switched over into a switch-off means for the screw-in torque which integrates the release clutch as torque-limiting element.

REFERENCES:
patent: 2765059 (1956-10-01), Amtsberg
patent: 2927672 (1960-03-01), Banner
patent: 2968979 (1961-01-01), Aijala
patent: 3106274 (1963-10-01), Madsen
patent: 3807539 (1974-04-01), Reed
patent: 4606443 (1986-08-01), Kimura
patent: 4630512 (1986-12-01), Durr
patent: 4655103 (1987-04-01), Schreiber et al.

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