Self-packaged medical device with frangible seal

Details Self-packaged medical device with frangible seal Self-packaged medical device with frangible seal

1978-05-25

1980-01-01

Dixson, Jr., William T.

Special receptacle or package

For a tool

Body treatment

215 12R, 215233, 220265, 220455, B65D 8500, B65D 1716, A61M 532

Patent

active

041812239

ABSTRACT:
A self-packaged medical device has a hollow body and an operative element inside for controlling the dispensing of fluids from the device. A handle, partly inside and partly outside of the body is connected to the operative element and is provided with a frangible seal at the point where the handle passes through a hole in the wall of the body. This seal allows maintenance of cleanliness of the interior of the body during storage, but does not interfere with the use of the handle to operate the element within the body once the seal is broken. The seal is formed by a continuous, frangible film adhering to the body and the handle, and is broken by motion of the handle, whereupon the device is ready for use. A hydrodermic syringe is desirably self-packaged in this fashion.
A method of making a self-packaged hypodermic syringe includes assembling a piston, with a piston rod connected to it, into a bore of a tubular barrel so that the rod extends out of the barrel. A clearance space is left between the rod and the inside wall of the barrel. This assembly is dipped, piston rod extension facing downward, into a bath of curable liquid plastic to a sufficient depth to cause a column of liquid plastic to rise into the clearance space in the barrel. Following withdrawal of the assembly from the bath, the liquid plastic is cured to a solid form, thereby providing a seal for the self-packaged syringe.

REFERENCES:
patent: 1664635 (1928-04-01), Magill
patent: 2127548 (1938-08-01), Boyles et al.
patent: 2525358 (1950-10-01), Jenett
patent: 2929525 (1960-03-01), Glover et al.
patent: 3107785 (1963-10-01), Roehr

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