Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1988-09-08
1990-12-11
Apley, Richard J.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604187, 604198, 604200, 604201, 206365, A61M 532
Patent
active
049767011
ABSTRACT:
An injection apparatus has a jacket having a front end and a cartridge for containing a liquid having a rubber membrane closing a front end of the cartridge at the front end of the jacket. A double-ended needle is held in a needle holder such that both ends thereof are exposed and oriented, one end at the membrane for piercing the membrane to obtain the liquid from the cartridge, and the opposite end for injecting the liquid. First cooperative threads on a cap and the jacket are for screwing the cap onto the jacket and unscrewing the cap therefrom, the first cooperative threads having a first pitch and a first rotational hand. Second cooperative threads are on the needle holder and one of the cap and cartridge, the second cooperative threads having a second pitch and a second rotational hand, which is opposite of the first rotational hand, for moving the needle holder and needle axially upon relative rotation between the cap and cartridge, whereby the one end of the needle pierces the membrane when the cap is unscrewed. A protective case is slidable in the cap axially for protecting the opposite end of the needle at least when the cap is screwed onto the jacket and while the cap is being unscrewed therefrom. A compression coil spring in the cap biases the protective case towards the needle holder at least while the cap is being unscrewed from the jacket.
REFERENCES:
patent: 3825003 (1974-07-01), Kruck
patent: 3967621 (1976-07-01), Schwarz
patent: 4009716 (1977-03-01), Cohen
patent: 4303069 (1981-12-01), Cohen
patent: 4731059 (1988-03-01), Wanderer et al.
Ejlersen Henning M.
Tullin Flemming
Apley Richard J.
Doyle Jennifer L.
Nordisk Gentofte A/S
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