Self-sheathing hypodermic needle
CA 1308325 C · Owner: Alberts, David S. · Inventors: Dorr, Robert T.; Alberts, David S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A needle assembly comprises a needle having a sharp point encased within and movable with respect to a sheath having a blunt end. A hub attached to the sheath has a recess therein for receiving a compressible member carried by an end of the needle having a collar thereon for engaging the compressible member. The compressible member retracts the point of the needle into the interior of the sheath to prevent contact of the point by user of the needle. When the needle assembly is attached to a syringe, or other instrument the, collar of the needle is engaged by a portion of the syringe and moved to compress the compressible member and expose the point of the needle for use.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 6, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.