Backstop device for a flangeless syringe

Details Backstop device for a flangeless syringe Backstop device for a flangeless syringe

1996-12-18

1997-12-23

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

A61M 5315

Patent

active

057002479

ABSTRACT:
A backstop device to prevent inadvertent withdrawal of a stopper or plunger rod from the open distal end of a flangeless syringe barrel. The backstop includes a retaining wall configured to engage at least a portion of the syringe barrel, and a finger plate at the proximal end of the retaining wall. The finger plate includes an aperture adjacent the open proximal end of the syringe through which a stopper may be inserted. If desired, a ridge may be formed around the periphery of the aperture which may engage with a portion of the syringe barrel. The aperture and, if present, the ridge present a smaller passageway than the inside diameter of the syringe, preventing inadvertent removal of the stopper from the syringe. The backstop can be placed on the syringe regardless of the presence or absence of the plunger.

REFERENCES:
patent: 4711637 (1987-12-01), Leigh et al.
patent: 4883471 (1989-11-01), Braginetz et al.
patent: 4946441 (1990-08-01), Laderoute
patent: 5019053 (1991-05-01), Hoffman et al.
patent: 5358497 (1994-10-01), Dorsey et al.

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