| 摘要 |
In one embodiment, a specialty wrench has a handle that is movable from a first position where the wrench acts as a conventional pipe or Stillson wrench and a second position where the handle is inclined, perhaps as much as 90°. The wrench can be used to start rotation of a valve wheel. After the valve wheel has been broken or started, the wrench handle is pivoted to a position where the valve wheel may be continuously rotated to either its open or closed position. In another embodiment, the jaw end of the wrench is angularly adjustable about a longitudinal axis so the wrench has another mode of operation, i.e. where the wrench may be used on conventional threaded connections.
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