The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 1978
Filed:
Jun. 10, 1977
Elijah C Walker, Takoma Park, MD (US);
Abstract
A tranquilizer dart for injecting a tranquilizing liquid into an animal consists of a cylindrical chamber with a tapered forward end provided with a pointed hollow needle. A conical valve bears against an annular seat in the chamber and has a triggering pin extending through the needle and normally projecting forwardly beyond its point. Tranquilizer liquid is contained in the chamber between the valve and a front plunger. A rear plunger is provided in the rear end of the chamber, and rearward movement thereof is limited by an insertable stop pin. The rear plunger serves, on loading, to compress the air between itself and the front plunger. Responsive to impact, the triggering pin is pushed back, unseating the conical valve, and the compressed air forces the front plunger forward, thus injecting the liquid into the animal.