Inviro Medical Devices, Inc.

Patco Ventures Ltd.

Other

Sun-rype Products, Ltd.

Panorama Plastics Ltd.

Donald A McLean

Fraser R Sharp

Laurel A Novacek

Linsey J Swann

The syringe includes a barrel, a plunger, and an adapter for mounting the needle in the distal end of the barrel. The adapter includes a protrusion projecting away from the needle end and into the barrel defining an annular space between the barrel and the protrusion. The plunger and protrusion have complementary surfaces whereby the plunger may grip the adapter for removal of the adapter into the interior of the barrel after use. These complementary surfaces afford initial resistance to further axial movement of the plunger toward the adapter, signalling the user that further axial pressure will permanently lock the plunger and adapter to one another whereby, upon application of full axial pressure on the plunger, the complementary surfaces of the plunger and adapter permanently lock to one another to enable joint unitary movement of the plunger and adapter together with the needle carried by the adapter into the barrel. The adapter includes vent passages communicating between the central passage through the adapter and the annular space whereby air can be vented from the barrel after receiving fluid within the barrel and prior to injection. Thus, the syringe may be oriented in a vertical position needle end uppermost with the vent passages forming the most superior portion of the barrel interior whereby air may be vented.

Safety syringe needle device with interchangeable and retractable needle platform

The syringe includes a barrel, a plunger and an adapter for mounting the needle in the distal end of the barrel. The proximal end of the plunger includes a plurality of circumferentially spaced teeth having radially projecting fingers with contact surfaces. The adapter includes a plurality of circumferentially spaced teeth having undercut surfaces. By advancing the plunger to engage the adapter and rotating the plunger relative to the adapter and syringe barrel, the plunger and adapter are locked to one another. By further rotating the plunger and adapter, the adapter is unscrewed from the barrel end and withdrawn with the syringe needle into the interior of the barrel. The plunger may be broken off adjacent the adapter and inserted, broken end first, into the distal end of the barrel to seal the barrel.

Safety syringe with retractable needle and universal luer coupling

A syringe has a barrel, a plunger and an adapter for threaded engagement with the distal end of the barrel. The adapter has a central axial passageway for passing fluid between proximal and distal ends. The plunger and adapter have cooperating engagement structure including connective and drive surfaces for connecting the plunger to the adapter and unthreading the adapter from the barrel end for withdrawal of the adapter into the interior of the barrel.

Safety syringe needle device with interchangeable and retractable needle

The personal emergency breathing system includes a canister with a filtration unit for supplying filtered ambient air to a gas mask. The mask includes a fitting from which a regulator and hose coupled to an air tank may be removed after exhaustion of the supply of air and to which the canister is coupled to supply filtered ambient air to the user. Upon removal of the canister from the mask, the canister affords an indication of prior use of the canister and is simultaneously disabled from resecurement to the gas mask.

Personal emergency breathing system for supplied air respirators

The syringe includes a plunger and an adapter carrying a needle, the adapter being threaded into the end of the barrel for withdrawal, upon connection with the plunger and together with the needle, into the interior of the barrel. To prevent the adapter from unseating from the barrel end before or during use, the needle guard and hub are connected to enable axial pressure from the needle guard to be transmitted through the hub to the adapter to attach the hub to the adapter. Cooperating surfaces on the needle guard and needle hub are engageable to enable a torque to be applied to the adapter only in a direction opposite to the direction of rotation of the adapter during unseating. To the extent rotation of the needle guard in the opposite direction applies a torque to the adapter, that torque is insufficient to unseat the adapter from the barrel end.

Needle guard and needle assembly for syringe

The syringe includes a barrel, a plunger, and an adapter for mounting the needle in the distal end of the barrel. The adapter includes a protrusion projecting away from the needle end and into the barrel defining an annular space between the barrel and the protrusion. The plunger and protrusion have complementary surfaces whereby the plunger may grip the adapter for removal of the adapter into the interior of the barrel after use. The adapter includes vent passages communicating between the central passage through the adapter and the annular space whereby air can be vented from the barrel after receiving fluid within the barrel and prior to injection. Thus, the syringe may be oriented in a vertical position needle end uppermost with the vent passages forming the most superior portion of the barrel interior whereby air may be vented.

This invention relates to a safety syringe needle device which has medical and industrial application. More particularly, this invention pertains to a syringe which, after being used by a person to inject medication or fluid into a patient, or in sampling or exposure to toxic materials, or the like, can be transformed by the person to withdraw the needle into the barrel of the syringe for disposal purposes, thereby eliminating needle stick injuries among such persons. A syringe comprising (a) a hollow elongated barrel means; (b) penetration means which is adapted to removably engage with an end of the barrel means; (c) plunger means adapted to fit within and move axially in the hollow barrel means; the plunger means causing a pumping action within the interior of the barrel means between the plunger means and the end of the barrel means when the plunger means is pushed into the interior of the barrel means in the direction of the end of the barrel means; and (d) engaging means at the end of the plunger means proximate to the penetration means, the engaging means being adapted to engage the end of the penetration means when the plunger means is fully inserted into the interior of the barrel means in the direction of the end of the barrel means and cause the penetrating means to part from the end of the barrel means and to be withdrawn into the interior of the barrel when the plunger means is withdrawn away from the end of the barrel means.

Growing community of inventors

Vancouver, Canada

Donald A McLean