| 摘要 |
A wrench for use on the fill cap for a portable fire extinguisher, the cap being threadedly attached to the top of the fire extinguisher, and being generally cylindrical with an externally threaded lower portion and an upper portion characterized by a diametrically extending flat surface, and an upwardly projecting indicator element at the middle of the flat surface, and a pair of raised portions on each side of the flat surface that provide spaced-apart upright surfaces that form a slot at opposite ends of the flat surface, the wrench being adapted to loosen or tighten such a cap, and having a socket portion with an opening adapted to loosely receive therein the indicator element and a first generally flat elongated handle extending from one side of the socket element and a socket arm extending from the opposite side of the socket element whereby the first and second handles are adapted to engage the flat surface as the indicator element is received within the socket element, and whereby the wrench can be turned to engage the walls of the slots in order to rotate the cap.
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