Disposable hypodermic syringe with plastic snap-on needle hub an

Details Disposable hypodermic syringe with plastic snap-on needle hub an Disposable hypodermic syringe with plastic snap-on needle hub an

1986-12-17

1988-05-31

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

128DIG18, A61M 5325

Patent

active

047478390

ABSTRACT:
A disposable hypodermic syringe having a cylindrical barrel open at both its forward and rearward ends, with the forward tooled end having a necked down portion terminating in an annular flange having an outer diameter greater than that of the necked down portion and less than that of the cylindrical barrel, a stopper positioned in the necked down portion of the cylindrical barrel to seal off the tooled end of the barrel, a resilient plastic needle hub assembly fitted on the forward end of the cylindrical barrel. The hub assembly including a cylindrical body having both a forward and a rearward end, a nose portion extending forwardly from the forward end of the cylindrical body, a needle affixed to the nose portion away from the forward end of the cylindrical body, the cylindrical body being sized whereby it will resiliently fit over and engage the annular flange of the necked down portion of the cylindrical barrel to operatively retain the needle hub assembly on the cylindrical barrel with a sleeve of heat shrinkable plastic fitted over a portion of the hub assembly and contiguous cylindrical barrel whereby when heat is applied the sleeve will shrink to firmly engage the aforedescribed syringe portions and thereby provide an air tight seal between the hub body and the cylindrical barrel and in addition whereby the shrink tension will cause the hub body to more firmly engage the annular flange.

REFERENCES:
patent: 3387609 (1968-06-01), Shields
patent: 3413974 (1968-12-01), Cohen
patent: 3437090 (1969-04-01), Sarnoff
patent: 4475903 (1984-10-01), Steenhuisen et al.
patent: 4568336 (1986-02-01), Cooper
patent: 4624393 (1986-11-01), Lopez

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