Syringe barrel with protective plastic cover
Hypodermic injection device having means for varying the medicament capacity thereof
Plural injecting device
ApplicationNo. 06/667443 filed on 11/01/1984
US Classes:604/157, Conduit impelled by spring604/225Means for preventing destructive piston impact on end of material reservoir
ExaminersPrimary: Yasko, John D.
Attorney, Agent or Firm
International ClassA61M 5/20 (20060101)
AbstractAn automatic injector having a glass container protecting sleeve of thin plastic material assembled in an operative position within the injector housing with respect to the glass medicament container when the stressed spring actuating assembly is in an unreleased condition so as to protect the glass container against fracture (1) due to handling impacts prior to release of the stressed spring assembly and (2) due to the force transmitted to the plunger following the release of the stressed assembly. The sleeve includes a cylindrical portion disposed in engagement with a cylindrical periphery of the glass container when the protective sleeve is in its operative position and an annular flange extending from the rear end of the cylindrical portion disposed in rearwardly adjacent relation to the rear end edge of the glass container when the protective sleeve is in its operative position.
Field of SearchMeans for preventing destructive piston impact on end of material reservoir
Injector components pivoted relative to each other to move piston
Injector or aspirator syringe supported only by person during use (e.g., hand held hypodermic syringe, douche tube with forced injection, etc.)
Conduit forced into body by self-acting fluid pressure, motor-driven, or mechanical energy storing means
Conduit impelled by spring