| 摘要 |
<p>An automatic injection device for small animals. The device comprises a work plate on which an animal to be injected can be positioned, a syringe mounted on the opposite side of the work plate from the side on which the animal to be injected is positioned during use of the device, first means for moving the syringe back and forth between a first position in which the syringe needle is entirely withdrawn on said opposite side of the work plate and a second position in which the syringe needle protrudes through an aperture in the work plate, and second means for detecting the presence of an animal to be injected in position on the work plate and for activating the first means. The first means comprises a single-action pneumatic motor and means for retaining the syringe in its second position while the mounting of the syringe is adjusted. Means for venting an accidental increase in pressure in the pneumatic supply, means for indicating the completion of a preset number of injections, means permitting the quick replacement of the syringe, and a transparent valve plate permitting the user to view at least a portion of the second means are provided.</p> |
