Injection devices

Details Injection devices Injection devices

1987-11-16

1989-03-21

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604263, A61M 532

Patent

active

048139408

ABSTRACT:
An accessory for an injection device of the kind in which liquid is drawn or expelled along a hollow needle comprises a protective sleeve for surrounding the needle. The sleeve has at least an end portion which is reciprocable in the direction of the length of the needle between an extended position in which the point of the needle is located within the sleeve to shield the point of the needle and a contracted position in which the point of thr needle projects from the sleeve, to enable an injection to be effected. A retaining arrangement is provided for retaining the sleeve in the extended position after the injection has been effected and for preventing the point of the needle from being exposed solely by application of pressure to the end portion of the sleeve in the direction of contracting movement.

REFERENCES:
patent: 4425120 (1984-01-01), Sampson et al.
patent: 4664654 (1987-05-01), Strauss
patent: 4681567 (1987-07-01), Masters et al.

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