Front loaded medical fluid syringe mounting
First Claim
1. A method of using a front-loading syringe in an injector, the syringe having a body, a closed forward end with a discharge opening therein, an open rearward end, and structure extending radially outward from and integrally included on the body, wherein the structure is located toward a rearward end of the body, the method comprising:
- inserting the syringe into an opening on the front of an injector housing,engaging the syringe forward of the radially extending structure located toward the rearward end of the body with a member, the member being movable relative to an axis between a retracted position and an engaging position in which the member engages the syringe,filling or expelling fluid from the front-loading syringe by movement of the plunger with a ram of the injector,removing the syringe from the injector by engaging a cam with the structure on the syringe, and rotating the syringe so that the cam causes movement of the member to the retracted position to permit removal of the syringe from the injector opening.
3 Assignments
0 Petitions
Accused Products
Abstract
Various sealing structures are used in a front-loading injector, for preventing leakage of spilled fluid from an external surface of a syringe into the vicinity of the drive ram. For example, a sealing gasket may be incorporated into the front face of the injector housing, for mating to the rearward circular edge of the cylindrical body of a syringe. Alternatively, sealing and locking functions may be performed by a single structure on the rearward end of the syringe. Further, leakage may be prevented by including a non-planar sealing flange on the syringe, positioned on the syringe forward of the locking structure, or by a two-piece structure, including a syringe and a separate leakage stopping washer for surrounding the syringe to halt the flow of fluid along the exterior of the syringe. As part of this aspect, or as an independent feature, the syringe may include an annularly discontinuous flange forward of the locking structure, for providing mechanical support for the syringe against the injector. Alternatively, an iris-like structure may be incorporated into the front surface of the injector, for closing about the syringe upon insertion of the syringe into the injector.
57 Citations
36 Claims
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1. A method of using a front-loading syringe in an injector, the syringe having a body, a closed forward end with a discharge opening therein, an open rearward end, and structure extending radially outward from and integrally included on the body, wherein the structure is located toward a rearward end of the body, the method comprising:
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inserting the syringe into an opening on the front of an injector housing, engaging the syringe forward of the radially extending structure located toward the rearward end of the body with a member, the member being movable relative to an axis between a retracted position and an engaging position in which the member engages the syringe, filling or expelling fluid from the front-loading syringe by movement of the plunger with a ram of the injector, removing the syringe from the injector by engaging a cam with the structure on the syringe, and rotating the syringe so that the cam causes movement of the member to the retracted position to permit removal of the syringe from the injector opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of using a front-loading, medical fluid injector, the method comprising:
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rotating a syringe relative to a housing of an injector, while at least a rearward end of the syringe is located within an opening defined in the housing of the injector; engaging a structure located toward a rearward end of the syringe to a component of the injector and moving said component of the injector due to the rotating; and moving an arcuate portion of the injector away from and out of contact with the syringe due to the moving of the component. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification