RETRACTABLE SYRINGE,申请号CA19912067805-传众专利搜索

RETRACTABLE SYRINGE

申请公布号：CA2067805(A1)

申请号：CA19912067805

申请日期：1991.10.04

申请公布日期：1992.04.05

申请人：

RETRAX, INC.

发明人：GLOYER, WALTER W.;BRIGHT, FREDERICK G.;ZDEB, BRIAN

分类号：A61M5/31;A61M5/32;A61M5/34;A61M5/50;(IPC1-7):A61M5/32

主分类号：A61M5/31

摘要：2067805 9205820 PCTABS00011 A retractable syringe includes a barrel (12, 212), one end of which comprises a mounting collar (14, 214). A needle carrier (16, 216) is releasably mounted within the collar (14, 214), and releasably supports a needle cartridge (18, 218). A hypodermic needle (20) is mounted within the cartridge (18, 218). A sheath (22, 222, 418, 420, 422) attaches at one end to the cartridge, and at the other end to the collar. A plunger (36, 236) is telescoped into the barrel (12, 218), and includes a relatively hard piston sealingly engaging the barrel (12, 218). The piston includes a latch (38, 238) for engaging the carrier (16, 216) and releasing it from the collar (14, 214). A pocket (76, 476) in the carrier has a support member (54) in its center, and a pair of helical ribs (64) for threadingly engaging a pair of tabs on the cartridge (18, 218). The cartridge (18, 218) sealingly receives the support member (54). The collar (14, 214) has slots (82) and inclined threads (84, 256) in its bore wall for engaging lugs (48, 248) on the carrier. The inclined threads (84, 256) have a friction bump (86, 270) near their blind ends. A retaining pin (92, 94) prevents relative rotation between the carrier (16, 216) and collar (14, 214) prior to desired retraction of the needle (20) into the barrel (12, 212).