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Safety cannula

  • US 5,941,850 A
  • Filed: 06/29/1998
  • Issued: 08/24/1999
  • Est. Priority Date: 06/29/1998
  • Status: Expired due to Fees
First Claim
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1. A first safety cannula (110) comprising:

  • A) a first housing (112) which comprises a first housing front (112F) having a first housing front opening (112FA) centrall positioned therein, a first housing rear (112R) having a first housing rear opening (112RA) and a first housing middle (112M) with a first housing middle divider (112MA) having an opening centrally positioned therein;

    B) a needle (14) slidably positioned within the first housing (112), the needle (14) comprises a needle front (14F) and a needle rear (14R);

    C) a retainer (16) securely connected to the needle rear (14R), the retainer (16) comprises a retainer front (16F) and a retainer rear (16R);

    D) a first spring (18) is positioned around the needle (14) between the retainer front (16F) and the first housing middle opening divider (112MA);

    E) a connector (22) comprises a connector rear (22R) and a connector front (22F) removably securely positioned in the first housing rear opening (112RA) and sealably attached to the retainer rear (16R);

    F) a cap (20) comprises a cap front (20F)removably securely positioned in the connector rear (22R) and a cap rear (20R) connected to an IV tube; and

    G) a lock (24) is movably positioned in the first housing middle (112M), the lock (24) comprises a lock button (24A) having a lock pin (24B) securely attached thereto extending therefrom, the lock (24) further comprises a lock spring (24C) positioned around the lock pin (24B) on an inside of the first housing middle (112M), after the first safety cannula (110) is used, a person lifts upwardly on the lock button (24A) which lifts the lock pin (24B) which is positioned rearwardly against the retainer front (16F), the retainer (16) moves reardwardly until the retainer rear (16R) hits the first housing rear (112R), concurrently, the needle (14) retracts within the first housing (112).

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