| 摘要 |
<p>A small piston operated by fingertip pressure to extract a liquid or cream from a housing such as a hollow tube is disclosed. The fingertip pusher comprises of a bullet shaped piston with a compression surface and a sloping pushing surface. The compression surface is generally flat and the sloping surface is a conical convex surface. In one embodiment, the fingertip pusher comprises of a piston with two ends that are generally in the shape of a bullet tip. In this embodiment, the fingertip pusher may be used both to extract a liquid or cream and to collect a specimen by generating a vacuum to retrieve the specimen.</p> |
