Syringe for dose-adjustable injections (Machine-translation by Google Translate, not legally binding)

摘要

A syringe for injections of adjustable doses, comprising a glass tube (1) housed in a cylindrical protective body (2), provided with longitudinal windows (3), between a removable nozzle (4) and a cover (5), with intercalation of corresponding sealing washers (6, 7), and having inside it a piston (8) of an elastic material, clamped between two rigid washers (9, 10) and slidable in axial direction by means of a corresponding rod ( 11), characterized in that the aforementioned stem (11), firmly connected at one of its ends to the compression washer (9) of the piston (8) located on the side of the nozzle (4), is coated for the most part of its length by a tube (12) supported at one of its ends, with adjustable pressure by means of an adjusting nut (13) mounted on the threaded rear end of the rod (11), on the other compression washer (10) of the plunger, said tube (12) being guided in a portion n tubular (14) associated with the lid (5) of the syringe and presenting on a substantial portion of its outer surface a circumferential toothing (15) of sawtooth profile, adapted to cooperate with a driving pawl (16), penetrating through a longitudinal opening (17) made in said tubular portion (14) that serves as a guide to the mentioned tube, is arranged at the end of one of the arms (18) of a steering lever (19) of double arm, articulated to a support (21) which, forming a single piece with the cover (5) of the syringe, is extended on a manipulation arm (22) of the apparatus, coupled with said lever (19). (Machine-translation by Google Translate, not legally binding)