(57) @ An installing tool having two way drive wrench portion particularly suited for
installing wedge-locking type aircraft fasteners. The wrench portion is adapted to
be installed on a driving tool. The wrench portion has at least a forwardly and a
rearwardly mounted polygonally-shaped opening with a cage in each opening, each cage
having a plurality of rollers mounted therein and loosely mounted within the polygonally
shaped openings but retained therein. In operation, the wrench portion is placed over
the fastener it is desired to install, the main body of the fastener, which may be
cylindrical, entering the forward polygonally-shaped opening in the wrench portion
and abutting against the rollers thereon which protrude inwardly toward the fastener.
A nut portion of the fastener, which may be cylindrical, enters the rear opening.
Rotation of the nut portion while holding the main body portion results in installation
of the fastener without need. for precise alignment of the wrench to the fastener.
This is because the loosely mounted cage adjusts for any misalignment and the rollers
abut against the walls of the polygonally-shaped opening to wedge or lock the wrench
to the fastener. After installation, the relaxation of the engagement of the tool
to the fastener allows for easy withdrawal.
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