B - Operations – Transporting – 25 – B
Patent
B - Operations, Transporting
25
B
B25B 13/06 (2006.01)
Patent
CA 2141740
A wrench for engaging a left-handed threaded bushing on a propane fuel tank is disclosed. The wrench has a handle portion on an end for gripping by the person and a head portion on a second end with an opening adapted to receive the bushing in a five-side releasable contact. The wrench has a middle portion with a graphic legend embossed thereon to instruct the user in the proper rotation of the wrench for either loosening or tightening the left-handed bushing on the propane fuel tank. The wrench is fabricated from an aluminum-zinc alloy to eliminate any chance of an explosion if the wrench is accidentally dropped when in use and operation. Further, the aluminum-zinc alloy eliminates any chance of rust which could shorten the useful life of the tool
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