Patent ID: 8516929

Claim:
An open-end wrench for quickly turning an object comprising: a driving end including a first jaw and a second jaw cooperating together to form a space defined therebetween, wherein the object is received in the space and includes a circumferential surface abutting against the first and second laws when operably turned by the open-end wrench, with one of the first and second jaws including a first recess defined therein and having an opening connected to and communicating with the space, with the first recess having a lateral wall including a first arcuate surface having first and second distal ends; a first movable engaging member including a first body pivotally fixed in the first recess by a first pivot, with the first body having an arcuate peripheral surface, with the first arcuate surface and the arcuate peripheral surface centered about the first pivot, with the arcuate peripheral surface of the first body in surface contact with the first arcuate surface of the lateral wall of the first recess, with the first recess pivotally supporting the first body during pivoting of the first body relative to the first recess, with the first pivot inserted in a direction through the body and fixedly engaged with a wall of the first recess; and a first elastic member resiliently engaging with the first movable engaging member and including a first leg abutting against the first distal end of the first arcuate surface of the lateral wall of the first recess and a second leg abutting against the first movable engaging member, with the first elastic member biasing the first movable engaging member to engage with the second distal end of the first arcuate surface of the first recess; wherein the first elastic member includes a loop, with the first leg extending from one of two distal ends of the loop, with the second leg extending from another of the two distal ends of the loop, with the first pivot inserted through the loop; wherein the open-end wrench is turned in a first turning direction to turn the object, with the first movable engaging member fixedly abutting against the circumferential surface of the object by the lateral wall of the first recess; and wherein the open-end wrench is turned in a second turning direction to move relatively to the object, with the object not turned, with the first movable engaging member being activated to pivot in a first pivoting direction by the circumferential surface of the object, with the first movable engaging member being activated to pivot in a reverse direction to the first pivoting direction by the first elastic member.