Viscoelastic memory means and flow control valve and use thereof

Details Viscoelastic memory means and flow control valve and use thereof Viscoelastic memory means and flow control valve and use thereof

1994-03-10

2000-06-27

Ahmad, Nasser

Stock material or miscellaneous articles

Circular sheet or circular blank

Aperture containing

128919, 137198, 137199, 428 641, 428 664, 604110, 604187, 604215, 604218, 604236, 604238, B32B 302

Patent

active

060804610

ABSTRACT:
Solid disks of polyethylene oxide are radiation crosslinked to instill viscoelastic memory. The disks are then pierced with a needle, heated, cooled and the needle removed to form disks containing a flow orifice in each which upon contact with water will revert to solid disks. A disk with a flow orifice made as just described when used as a memory flow control valve in a conventional injection device will produce a syringe with a single-use, auto-destruct capability. When the disk is inserted in a retainer in the flow channel of the injection device, a drug/vaccine can be drawn into the syringe and then expelled for a preselected time less than six minutes before the water in the drug/vaccine causes the flow orifice in the disk to close, the disk then reverting to its solid shape due to its viscoelastic memory.

REFERENCES:
patent: 3419006 (1968-12-01), King
patent: 3429794 (1969-02-01), Patterson
patent: 3757779 (1973-09-01), Roviski
patent: 4226236 (1980-10-01), Genese
patent: 4470415 (1984-09-01), Wozniak
patent: 4596728 (1986-06-01), Yang et al.
patent: 4781683 (1988-11-01), Wozniak et al.
patent: 4828547 (1989-05-01), Sahi
patent: 4919655 (1990-04-01), Cline
patent: 5000735 (1991-03-01), Whelan
Popular Science, p. 59, Dec. 1989.
Popular Science, p. 16, Jul. 1989.
J. Silverman, "Radiation Processing: The Industrial Applications of Radiation Chemistry", J. of Chem. Ed., pp. 168-173, Feb. 1981.
"One-time throwaway", Popular Science, p. 16 (Jul. 1989).
"Weapon against AIDS", Popular Science, p. 59 (Dec. 1989).

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