Combination plunger device for a dual chamber mixing syringe
First Claim
1. A combination plunger for a syringe mixing device, said combination plunger comprising:
- a mixing plunger and a delivery plunger are releasably engaged to facilitate coordinated or synchronous axial movement of the mixing plunger and the delivery plunger for at least a portion of operation of the combination plunger; and
a pill housing having a biasing member, wherein the mixing plunger and the delivery plunger are releasably engaged to facilitate coordinated or synchronous axial travel of the mixing plunger and the delivery plunger until disengagement of the mixing plunger and the delivery plunger, the mixing plunger comprises one or more connection members at a proximal end thereof, and the delivery plunger comprises one or more connection recesses which releasably engage, or are releasably engaged by, the connection members of the mixing plunger.
5 Assignments
0 Petitions
Accused Products
Abstract
A combination plunger, a mixing device and a mixing syringe including the same are provided. The mixing syringe includes concentric outer and inner barrels that form an outer chamber, the inner barrel having an inner chamber. The combination plunger includes a mixing plunger and a delivery plunger and a biasing means. The mixing plunger is slidably located in the outer chamber and translated by coordinated depression of the delivery plunger to transfer a first substance from the outer chamber to mix with a second substance in the inner chamber. After the mixing stage is complete, the delivery plunger is disengaged from the mixing plunger and permitted, such as by rotation, to be further depressed in the axial direction to deliver fluid contents of the mixing syringe to a recipient. The mixing syringe needle is then retracted as result of engagement by the delivery plunger and activation of the biasing means.
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Citations
29 Claims
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1. A combination plunger for a syringe mixing device, said combination plunger comprising:
- a mixing plunger and a delivery plunger are releasably engaged to facilitate coordinated or synchronous axial movement of the mixing plunger and the delivery plunger for at least a portion of operation of the combination plunger; and
a pill housing having a biasing member, wherein the mixing plunger and the delivery plunger are releasably engaged to facilitate coordinated or synchronous axial travel of the mixing plunger and the delivery plunger until disengagement of the mixing plunger and the delivery plunger, the mixing plunger comprises one or more connection members at a proximal end thereof, and the delivery plunger comprises one or more connection recesses which releasably engage, or are releasably engaged by, the connection members of the mixing plunger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- a mixing plunger and a delivery plunger are releasably engaged to facilitate coordinated or synchronous axial movement of the mixing plunger and the delivery plunger for at least a portion of operation of the combination plunger; and
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15. A mixing device for a syringe, wherein the mixing device comprises:
- an outer barrel and an inner barrel in a substantially coaxial relationship that form an outer chamber; and
a combination plunger comprising a pill housing having a biasing member, a mixing plunger and a delivery plunger, wherein the mixing plunger and the delivery plunger are releasably engaged to each other to facilitate coordinated or synchronous axial movement for at least a portion of operation of the combination plunger, wherein the mixing plunger is disenagageable from the delivery plunger after mixing is complete, and the mixing plunger is disenagageable from the delivery plunger by rotation of the delivery plunger relative to the mixing plunger. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
- an outer barrel and an inner barrel in a substantially coaxial relationship that form an outer chamber; and
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29. A combination plunger for a syringe mixing device, said combination plunger comprising:
- a mixing plunger and a delivery plunger are releasably engaged to facilitate coordinated or synchronous axial movement of the mixing plunger and the delivery plunger for at least a portion of operation of the combination plunger, and a pill housing having a biasing member, wherein disengagement of the mixing plunger and the delivery plunger permits separate or independent axial movement of the delivery plunger, and disengagement of the mixing plunger and the delivery plunger includes rotational disengagement of the delivery plunger from the mixing plunger.
Specification