Skin prickers
First Claim
1. A skin pricker comprising an elongate housing, a lancet within the housing, spring urged towards the forward end thereof, momentarily to project its needle tip through an aperture at said forward end when the lancet is released from a cocked position, and a trigger carried by the housing with two modes of engagement with the lancet, in the first mode restraining the lancet from significant forward movement from its initial position but allowing retraction of the lancet to the cocked position, and in the second mode holding the lancet in said cocked position until operation of the trigger releases it.
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Accused Products
Abstract
A skin pricker has an elongate housing containing a spring-loaded lancet which, when released from a rearward, cocked position by a trigger, shoots forward momentarily to project the tip of its needle through one end of the housing. The lancet is then prevented by a spring ratchet from being returned again to the cocked position. The cocking can be done through a twist-and-pull cap initially covering the needle tip and extending through that one end of the housing, the user pushing the cap to retract the lancet from its initial position. To guard against the lancet being prematurely pulled forwards by the cap and being trapped against cocking by the ratchet, the lancet has a formation that will engage a part of the trigger.
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Citations
9 Claims
- 1. A skin pricker comprising an elongate housing, a lancet within the housing, spring urged towards the forward end thereof, momentarily to project its needle tip through an aperture at said forward end when the lancet is released from a cocked position, and a trigger carried by the housing with two modes of engagement with the lancet, in the first mode restraining the lancet from significant forward movement from its initial position but allowing retraction of the lancet to the cocked position, and in the second mode holding the lancet in said cocked position until operation of the trigger releases it.
Specification