Safety needle
First Claim
Patent Images
1. A safety needle comprisinga housing;
- a blunt cannula mounted in and extending from said housing;
a slider movably mounted in said housing and on said blunt cannula for movement between a locked position and an unlocked position;
a needle mounted in and extending from said slider in concentric relation to said blunt cannula, said needle having a sharpened end projecting beyond said blunt cannula in said locked position of said slider and retracted over said blunt cannula in said unlocked position of said slider;
a spring in said housing for biasing said slider from said locked position towards said unlocked position;
a manually operated actuator movable between a first position blocking movement of said slider from said locked position to said unlocked position and a second position allowing movement of said slider from said locked position to said unlocked position under a biasing force of said spring.
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Abstract
The safety needle employs a manually operable actuator that can be depressed into a housing in order to release a spring-biased slider that carries a hollow needle. Upon release, the slider moves into a position to retract the needle over a blunt cannula so that the blunt cannula protects against cutting by the needle. An actuator guard may also be employed to prevent inadvertent actuation of the actuator.
106 Citations
17 Claims
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1. A safety needle comprising
a housing; -
a blunt cannula mounted in and extending from said housing;
a slider movably mounted in said housing and on said blunt cannula for movement between a locked position and an unlocked position;
a needle mounted in and extending from said slider in concentric relation to said blunt cannula, said needle having a sharpened end projecting beyond said blunt cannula in said locked position of said slider and retracted over said blunt cannula in said unlocked position of said slider;
a spring in said housing for biasing said slider from said locked position towards said unlocked position;
a manually operated actuator movable between a first position blocking movement of said slider from said locked position to said unlocked position and a second position allowing movement of said slider from said locked position to said unlocked position under a biasing force of said spring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification