Single-use lancet device
First Claim
Patent Images
1. A single-use disposable lancet comprised of:
- a trapezoidal or elliptically shaped body with upper and lower halves flexibly joined along one edge, a trigger button molded into the upper half of the body and capable of direct up and down motion, a needle assembly movable between a cocked position and a striking position, a drive spring for advancing said needle assembly, detent means for holding the needle assembly, said detent means being molded into the lower half of the body and released by downward motion of the trigger button, a detachable safety cap carried by said needle assembly which covers and protects the tip of said needle, a pull-tab extending outwardly from said body, and a thin plastic fiber connector between said pull-tab and said safety cap adapted to detach said safety cap when said pull-tab is manipulated, said thin plastic fiber connector being sufficiently flexible to prevent an effective compressive force from the pull-tab from being applied to the drive spring to recock said needle assembly.
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Abstract
A single-use, spring driven lancet is described. The device is precooked during assembly so that the user needs only to remove the safety cap prior to use. A concave trigger button with direct up and down motion releases the spring, causing the tip of the lancet to strike the subject'"'"'s finger. A thin plastic fiber connection between the pull-tab and the needle safety cap prevents any compressive force from being applied to the drive spring, which effectively prevents recocking of the device.
192 Citations
11 Claims
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1. A single-use disposable lancet comprised of:
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a trapezoidal or elliptically shaped body with upper and lower halves flexibly joined along one edge, a trigger button molded into the upper half of the body and capable of direct up and down motion, a needle assembly movable between a cocked position and a striking position, a drive spring for advancing said needle assembly, detent means for holding the needle assembly, said detent means being molded into the lower half of the body and released by downward motion of the trigger button, a detachable safety cap carried by said needle assembly which covers and protects the tip of said needle, a pull-tab extending outwardly from said body, and a thin plastic fiber connector between said pull-tab and said safety cap adapted to detach said safety cap when said pull-tab is manipulated, said thin plastic fiber connector being sufficiently flexible to prevent an effective compressive force from the pull-tab from being applied to the drive spring to recock said needle assembly. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A single use, disposable and non-reusable lancet, comprising:
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a body, a needle assembly carried by said body, said needle assembly including a needle and a needle support, said needle assembly being movable between a cocked position and a striking position, a drive spring means for advancing said needle assembly from its cocked position to its striking position, detent means holding said needle assembly in its cocked position, trigger means for releasing said needle assembly from said detent means, a non-reusable, breakaway safety cap means for protecting and maintaining sterilization of said needle while in its cocked position, a pull-tab extending outwardly from said body, said pull-tab adapted to be grasped and manipulated by a user, and a thin flexible fiber connecting said safety cap and said pull-tab, whereby said pull-tab may be manipulated to cause said safety cap to separate from said needle assembly, and wherein said flexible fiber has insufficient compressive strength to recock said needle assembly. - View Dependent Claims (8, 9, 10, 11)
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Specification