Syringe Plunger Seal
AssigneeAdvanced Biomaterial Systems, Inc.
InventorRoy B. Bogert
Life of this patent
Estimating the term…
Abstract
A bone filler delivery device includes a syringe assembly. The syringe assembly has a barrel with a first opening for dispensing bone filler and a second opening adapted to receive a plunger. A plunger is adapted to mate with the barrel to define a bone filler dispensing chamber therein. The plunger can move through the barrel in an axial direction. A seal is coupled to the plunger and is adapted to seal against the barrel. The seal includes an annular body and an annular first lip that extends from the body in a first direction and is adapted to flex toward the barrel when the plunger is moved through the barrel toward the first opening.
Claims36
A syringe assembly for delivering bone filler, the syringe assembly comprising:
- a barrel with a first opening through which bone filler can be dispensed and a second opening adapted to receive a plunger;
- a plunger adapted to mate with the barrel to define a bone filler dispensing chamber in the barrel and adapted to move through the barrel in an axial direction;
- and
- a seal coupled to the plunger for sealing against the barrel, wherein the seal comprises:
- an annular body;
- and
- an annular first lip that extends from the body in a first direction, wherein the annular first lip is adapted to flex toward the barrel and seal the dispensing chamber when the plunger is moved toward the first opening.
A bone cement mixing and delivery device, comprising:
- a mixing section adapted to mix components to form bone cement;
- a dispensing section with a syringe assembly that is adapted to dispense the bone cement;
- and
- a valve that can be manipulated to open a flow path between the mixing section and the dispensing section;
- wherein the syringe assembly comprises:
- a barrel with a first opening for dispensing the bone cement and a second opening to receive a plunger;
- a plunger that can be inserted into the barrel via the second opening to define a dispensing chamber therein;
- and
- a seal coupled to the plunger, wherein the seal comprises an annular body, an annular first lip that extends from the body in a first direction and is adapted to flex toward the barrel when the plunger is advanced toward the first opening and an annular second lip that extends from the body in a second direction and is adapted to flex toward the barrel when the plunger is moved toward the second opening inside the barrel.
Dependencies are inferred from the claim text.