A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/50 (2006.01) A61M 5/32 (2006.01) A61M 5/34 (2006.01)
Patent
CA 2137875
A safety syringe includes: a hollow needle (2) normally eccentrically held in a front portion of a syringe (1), a plunger (31) straightly slidably held in the syringe (1) for injection use, an arrowhead portion (301) of a coupling member (30) retained in the plunger (31) engageable with at least a biasing socket (27) recessed in a rear needle portion of the hollow needle (2) with the biasing socket (27) generally formed as a conical shape having a longitudinal conical axis (270) inclined outwardly from a needle axis (200) of the needle (2) when normally fixed in the syringe (1) with the needle axis (200) parallel to a syringe axis (100) longitudinally formed in a center line of the syringe (1), whereby upon retraction of the plunger (31) and the needle (2) coupled to the plunger (31), with the biasing socket (27) of the needle (2) forcibly coupled with the arrowhead portion (301) of the coupling member (30), into a bore portion (10) in the syringe (1), the needle (2) will be automatically inclined towards a front shoulder portion (15a) of the syringe (1) as the biasing socket (27) of the needle (2) is restored by the arrowhead portion (301) of the coupling member (30) retained in the plunger (31) to prevent an outward protruding of the retracted needle (2) from the syringe (1) for preventing its pricking to the others.
Chen Long-Hsiung
Ridout & Maybee Llp
LandOfFree
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