Disposable additive syringe
First Claim
1. A disposable additive syringe having a cylindrical barrel closed at the rear end by a slidable plunger and at the front end by a diaphragm including:
- a flexible wall facing rearwardly in a convex manner, a medicament chamber formed between the slidable plunger and the flexible wall, a cap and spike assembly mounted on the forward end portion of the cylindrical barrel, said spike being positioned within the cylindrical barrel with its pointed end spaced from and outside the flexible wall, said spike having a passage therethrough, a cannula extending forwardly from the cap and spike assembly in fluid communication with the spike passage, a cylindrical safety guide surrounding the cannula in a spaced manner, a spike mounted on the forward end portion of the safety guide, said spike having a throughbore aligned with the cannula whereby the forward end portion of the cannula fits within said throughbore, and a sheath covering the spike.
1 Assignment
0 Petitions
Accused Products
Abstract
A disposable additive syringe having a cylindrical barrel closed at the rear end by a slidable plunger and at the front end by a diaphragm assembly including a flexible and pierceable wall defining a medicament chamber between the plunger and the flexible wall. A cap and spike assembly mounted on the front end of the cylindrical barrel, said spike being positioned so that its end will be spaced from and outside the flexible wall and having a passage therethrough, a cannula extending forwardly from the cap and in fluid communication with the spike, a cylindrical safety guide extending forwardly from the cap and surrounding the cannula, a spike mounted by the safety guide and in fluid communication with the cannula, and a sheath supported by and covering the spike.
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Citations
6 Claims
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1. A disposable additive syringe having a cylindrical barrel closed at the rear end by a slidable plunger and at the front end by a diaphragm including:
- a flexible wall facing rearwardly in a convex manner, a medicament chamber formed between the slidable plunger and the flexible wall, a cap and spike assembly mounted on the forward end portion of the cylindrical barrel, said spike being positioned within the cylindrical barrel with its pointed end spaced from and outside the flexible wall, said spike having a passage therethrough, a cannula extending forwardly from the cap and spike assembly in fluid communication with the spike passage, a cylindrical safety guide surrounding the cannula in a spaced manner, a spike mounted on the forward end portion of the safety guide, said spike having a throughbore aligned with the cannula whereby the forward end portion of the cannula fits within said throughbore, and a sheath covering the spike.
- View Dependent Claims (2, 3, 4)
- 5. A disposable additive syringe having a cylindrical barrel closed at the rear end by a slidable plunger and at the front end by a diaphragm including a body portion sealingly engaging the inner wall of the cylindrical barrel and a flexible wall connected to the rearward side of the body and extending rearwardly therefrom, a medicament chamber formed between the slidable plunger and the flexible wall, a cap and spike assembly mounted on the forward end portion of the cylindrical barrel, said cap fitting over the cylindrical barrel and supporting the spike so that its end will be spaced from and outside the flexible wall, said spike having a passage therethrough, a cylindrical projection extending forwardly from the cap and axially aligned with the spike passage, a forwardly extending cannula mounted by the projection, a cylindrical safety guide extending forwardly from the cap and surrounding the cannula in a spaced manner, a spike mounted on the end portion of the safety guide, said spike having a throughbore aligned with the cannula whereby the forward end portion of the cannula will fit within said throughbore, and a sheath threadedly secured to the spike to cover same.
Specification