Power driven tool and drive system therefor
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United States of America Patent
Stats
-
May 14, 1991
Grant Date -
N/A
app pub date -
Jul 7, 1989
filing date -
Jul 8, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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