| 摘要 |
This invention relates to apparatus for taking a fluid sample; for example apparatus for taking a breath sample for use in a breath alcohol tester. The apparatus (10) has a breath tube (11) from which a sample can be taken by a latch-operated sampling mechanism (13). The mechanism is released for sampling by the downward movement of a projection (30). Prior to this downward movement the projection (30) is lifted by an expansible bag (22) being inflated by the subject's breath. When the subject stops exhaling, or even reverses their breath, the bag (22) deflates by venting through orifice (22a) under the weight of the lever arm (25) and the force of the spring (29). This deflation results in the downward, and activating, movement, mentioned above of the projection (30). |
