Injection device

Details Injection device Injection device

1987-12-10

1990-09-18

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604110, 604194, A61M 500

Patent

active

049574906

ABSTRACT:
An injection device which is devised to be safer in use than many prior such devices comprises a generally cylindrical barrel section which is substantially closed at its first end but has an aperture in that end to allow an injection needle to pass through it, a needle support member to slide within the barrel section and shaped to receive one end of a liquid container such as an ampoule of anaesthetic, and a plunger mounted at the other end of the barrel section for axial movement in said section. The plunger is adapted both to express liquid from the liquid container when the plunger is advanced within the barrel and also to interconnect with either the needle support member or the liquid container, whereby withdrawal of the plunger withdraws both the liquid container and also the needle and its support member into the barrel section for disposal.

REFERENCES:
patent: 3890971 (1975-06-01), Leeson et al.
patent: 4148316 (1979-04-01), Xanthopoulos
patent: 4664653 (1987-05-01), Sagstetter et al.
patent: 4834717 (1989-05-01), Haber et al.

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