专利汇可以提供PORTABLE SPIROMETER专利检索,专利查询,专利分析的服务。并且A spirometer includes a chassis (3) with an enclosed curved passageway (33). The passageway (33) has an inlet (17), for receiving the forced expiration of the user, and an outlet (35), through which the expiration may be exhausted from the passageway (33). A vane (37) is eccentrically and pivotally mounted in the passageway, between the inlet (17) and the outlet (35) and is moved by the user's forced expiration. The vane (37) pivots from a first position closing off the passageway to a succession of other open positions forming a widening gap between the vane and part of the passageway as the vane moves therethrough. The vane (37) is eccentrically positioned in the passageway. A vane position measuring system preferably using a Hall Effect device (73) measures the position of the vane over time, during the interval when the user blows into the spirometer. A microprocessor (79) converts the signal from the vane position measuring system into various diagnostic parameters applicable to the user's lung condition.,下面是PORTABLE SPIROMETER专利的具体信息内容。
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