Power driven tool and drive system therefor

Details Power driven tool and drive system therefor Power driven tool and drive system therefor

1989-07-07

1991-05-14

Yost, Frank T.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

173 2, 81469, 29407, B25B 23151

Patent

active

050147943

ABSTRACT:
A portable screw fastener driving tool is driven electrically from a solid state inverter and intended to be coupled to any selected one in a set of screw fastener engaging members, each demanding a drive enabling tightening of the engaged fastener by parameters (e.g. torque, angle, speed) specific to its size or type. Code elements are provided on the members in a binary code pattern specific for each member. Sensors on the tool read the code pattern on the member connected to the tool and serve it electrically to a decoding unit which transforms the read binary pattern to signals adapted to control the inverter the way the member demands.

REFERENCES:
patent: 3965778 (1976-06-01), Aspers et al.
patent: 4375121 (1983-03-01), Sigmund
patent: 4653358 (1987-03-01), Lankry
patent: 4813312 (1989-03-01), Wilhelm
patent: 4858312 (1989-08-01), Van Naarden

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