| 摘要 |
This tool can be easily made from mostly standard parts, such as standard pipe for the cylindrical arm having an arched member to straddle a tire of any size fixed to one end of the pipe and a piston in said pipe having a rod extending from the inner end of said pipe with a wedge head on its outer end for pressing against the bead edge of a tire, while the outer end of the arched member is purchased against the opposite edge of the wheel rim, and a hand pump unit having a threaded port connected to the outer end of the cylindrical arm for pumping fluid under pressure against said piston to press said wedge head between the bead edge of the tire and the rim edge of the wheel for breaking the tire off the side of the rim without necessarily removing the wheel from its axle. The tool can be readily handled by the cylindrical arm with one hand while the other hand is used for operating the hand pump. A tire iron may be used for the pump handle.
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