| 摘要 |
A grip-tightener wrench system has a plurality of fastener-head contacts (18, 19, 20) on an inside periphery of a wrench enclosure (1, 21) with spring opening of a closure gap (4) between opened and closed positions. The wrench enclosure has an outside periphery with closure appendages (16, 22, 24). The wrench enclosure rotates in a wrench housing (5) having housing appendages (17, 23, 25) against which the closure appendages are forced for closing the closure gap by rotation of the wrench housing in either direction of wrench rotation to rotate a fastener head or other object positioned in the wrench enclosure. The wrench housing can be affixed to or optionally attachable to a wrench handle (8, 10, 11), a wrench insert (9) or a wrench socket (12). The fastener-head contacts can be a plurality of walls (18) or a plurality of wall corners (20). Also, the fastener-head contacts can be pointed edges (19) that penetratively grip surfaces such as rounded fastener heads, round pipes, bars or rods with various shapes.
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