| 摘要 |
A swing arm for supporting a saliva suction pump nozzle which can be maneuvered by an operator without an assistant, consisting of an upper arm and forearm made of lengths of pipe and connected together by a pivotal joint like an elbow, with cables and hose which pass through the forearm and the upper arm being stowed under the surface of the forearm and the upper arm except for the area of said the joint, a vertical part of the upper arm being inserted revolvably in a shaft-supporting holder in the form of a cut of pipe fixed on a pole of a dental chair unit by a two part band, with a saliva suction pump nozzle being fixed on the free end of the suction pump hose at the free end of the forearm.
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