Automatic retractable medical needle and method
February 4, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1526824 2855927 3108592 Hub device for preventing liquid leakage Protective enclosure for hypodermic syringe Safety device for hypodermic needles Disposable safety syringe having means for retracting its needle cannula into its medication cartridge Assembly of needle and protector Safety device and method for removal and disposal of medical needles Combination retractable needle cannula and cannula lock for a medication carpule InventorApplicationNo. 650419 filed on 02/04/1991US Classes:604/195, Portion of body entering conduit stored in material receiving syringe reservoir604/110Having means for preventing reuse of deviceExaminersPrimary: Yasko, John D.Assistant: Finkel, Sharon Attorney, Agent or FirmInternational ClassA61M 005/32AbstractA guard mechanism for a medical needle has a hub and a hollow needle portion. The guard includes a tubular sheath, a spring within the sheath which biases the hub to draw the needle into the sheath. Jaws project from an end of the sheath for gripping the needle portion to prevent the spring from drawing the needle portion into the sheath. A body surrounds the sheath for grasping and holding the guard mechanism, and has a port through which the jaws project, the jaws being resiliently biased to bear against the port, such that when the sheath is moved toward the port, the jaws slide out from the port and are thereby freed to resiliently expand, thereby releasing the needle portion and permitting the spring to withdraw the needle portion into the sheath.Field of SearchHaving means for preventing reuse of devicePortion of body entering conduit stored in material receiving syringe reservoir Specific structure of means connecting body entering conduit to syringe Conduit holder attached to another syringe component by thread means Conduit or holder therefor removably attached to another injector component by friction With piston or plunger for expelling material from body or injector reservoir Specific structure of means coupling piston to piston actuator Cover or protector for body entering conduit movable axially relative to one another Removable cover or protector for body inserted conduit | |
