| 摘要 |
A chain wrench for engagement around a circumference of a threaded workpiece such as a pipe and the like and disposed at a right angle to the length of the workpiece. The chain wrench may be used for tightening the threaded workpiece on a threaded coupler or used for loosening the threaded workpiece on the threaded coupler. The chain wrench includes a chain wrench body with the front of wrench body having a plurality of teeth for releasably engaging and gripping of the workpiece. A first end of a chain is adapted for tightening on wrench body. A second end of the chain is releasably mounted on the wrench body so that a length of the chain can be adjusted when received around different sizes of the workpiece. The wrench body further includes a first attachment block extending upwardly from the top of the wrench body. The first attachment block is adapted for receiving one end of a handle. When the handle is secured to first attachment block, the handle may be disposed at a right angle to the length of the workpiece, parallel to the length of the workpiece and at an angle to the length of the workpiece. The wrench body also includes a second attachment block extending downwardly from the bottom wrench body. When a pair of the subject chain wrenches are secured to the workpiece and to the threaded coupler, the second attachment blocks are used to receive utility attachment blocks connected a utility bolt. When the bolt is tightened the workpiece can be loosened or tightened on the coupler.
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