Screw tool
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United States of America Patent
Stats
-
Dec 5, 1989
Grant Date -
N/A
app pub date -
Sep 17, 1987
filing date -
Oct 31, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A screw tool has a direction-reversible catch including clamping members disposed within wedge-shaped clamping spaces between an outer drive ring part (5) and an inner driven core part (8) of approximately triangular shape in cross section, the clamping members are displaceable by a rotatable switch member which is lockable in its switch positions into release with respect to the wedge walls of the corresponding clamping space by drivers acting on the clamping members and blocking the passage of the clamping members into, in each case one of their two clamping positions, and it proposes, in provide for a structurally simple friction-minimized construction wherein each clamping member lies loosely in a clamping space and is displaceable into its clamping position by the rotation of the drive ring part.
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