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US 5,102,388 AGranted
Sequential delivery syringe
OwnerJohn E. Richmondinventor
Life of this patent
Estimating the term…
Abstract
The syringe of the invention segregates various fluids or solutions within separate compartments of its barrel, to be delivered in a specific sequence as they are expelled from the delivery tip by actuation of its plunger. A plurality of stoppers are incorporated within the barrel, with all but the one adjacent to the plunger includng a piercing device to penetrate each following stopper in sequence. The length of the piercing shaft of each such device is selected sufficient to pierce the stopper advancing towards it, yet not so long as to reach the piercing shaft of that advancing stopper.
Claims10
A syringe comprising:
- a barrel, having a delivery end;
- a plunger;
- a first stopper coupled to said plunger and inserted within said barrel;
- a second stopper inserted within said barrel, positioned between said first stopper and the delivery end of said barrel;
- and
- at least two additional stoppers inserted within said barrel, positioned between the delivery end of said barrel and said second stopper, each being coupled with a piercing device having a piercing shaft facing in the direction of said second stopper, and with each piercing shaft being of sufficient length to pierce the stopper advancing towards it upon actuation by said plunger.
3 more elements
A syringe comprising:
- a barrel, having a delivery end;
- a plunger;
- a first stopper coupled to said plunger and inserted within said barrel;
- a second stopper inserted within said barrel, positioned between said first stopper and the delivery end of said barrel;
- a third stopper inserted within said barrel, positioned between said second stopper and the delivery end of said barrel;
- and
- a piercing device coupled with said third stopper, having a piercing shaft facing in the direction of said second stopper;
- and
- with said shaft being of sufficient length to pierce said second stopper when said plunger is actuated to advance said first stopper towards said second stopper;
- a fourth stopper inserted within said barrel, positioned between the delivery end of said barrel and said third stopper, and being coupled with a piercing device having a piercing shaft facing in the direction of said third stopper, and with the piercing shaft coupled with said forth stopper being of sufficient length to pierce said third stopper advancing towards it upon actuation by said plunger.
7 more elements
Dependencies are inferred from the claim text.