A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/32 (2006.01) A61M 5/50 (2006.01)
Patent
CA 2504446
The present invention provides a retractable safety syringe, which comprises a barrel, a sleeve, a connector, a plunger and a standard needle. The barrel is a hollow tube for fitting the sleeve at the front end. The connector is fitted in the sleeve and connected to the standard needle. The plunger is fitted in the rear lumen of the barrel for delivering fluid and retracting the connector with the standard needle into the barrel. The sleeve has twin-twisted threads on its inner surface and is integrated with a ring seal on its rear end by thermal melting. The connector is formed integrally by a cane-shaped cylinder and a tub-body, wherein the tub-body can be engaged with the plunger so as to retract the standard needle with the connector into the barrel by pulling the plunger. In the present invention, the barrel, the sleeve and the connector are separated. In use, the cone-shaped cylinder is tightly held with the standard needle by screwing the standard needle clockwise. Then an injection is performed or a sheath is recapped on the standard needle for a new standard needle replacement. When the plunger is pressed to a full stop of travel, the tub-body of the connector will engage with the plunger. Accordingly, the standard needle connected with the connector can be retracted into the barrel.
Intai Technology Corp.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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