Backstop device for a syringe

Details Backstop device for a syringe Backstop device for a syringe

1995-04-21

1997-09-16

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

A61M 500

Patent

active

056674953

ABSTRACT:
A backstop device to prevent inadvertent withdrawal of a stopper from the open distal end of a syringe barrel. The backstop, mounted to a syringe flange, includes a pair of spaced apart plates located on either side of the flange. Both plates include respective apertures accessible through lead openings formed through the plates. The bottom aperture is formed for snug contact with the syringe barrel, while the upper aperture includes a ridge engageable with the interior of the syringe barrel adjacent the open distal end. The top aperture and ridge together present a smaller passageway than the diameter of the stopper, preventing inadvertent removal thereof. The backstop can be placed on the syringe regardless of the presence or absence of the plunger.

REFERENCES:
patent: 3076455 (1963-02-01), McConnaughey et al.
patent: 4643724 (1987-02-01), Jobe
patent: 4711637 (1987-12-01), Leigh et al.
patent: 4883471 (1989-11-01), Braginetz et al.
patent: 4946441 (1990-08-01), Laderoute

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