Skin prickers
First Claim
1. A skin pricker comprising a lancet spring loaded in such a manner as to be releasable from a primed rearward position so as momentarily to project its tip from the forward end of a barrel and then retract it, wherein the lancet is formed integrally with a trigger that projects outwardly through an aperture in the forward end of the barrel, there being a shearable bridge within the barrel between the trigger and the lancet, and wherein, in manufacture, the barrel is closed around the lancet to form the aperture and capture the trigger, which keeps the spring means primed, the actuation of the trigger shearing the bridge and releasing the lancet.
2 Assignments
0 Petitions
Accused Products
Abstract
After removal of a protective cap, the forward end of a barrel (1) of a skin pricker is placed against the skin and the user presses the projecting end of a trigger (6) forwards. As the trigger pivots about a fulcrum (9) of the barrel (1), a thin bridge onto a lancet (2) shears. The lancet is released, and shoots forward as a spring (3) extends, thus projecting a needle tip (4) to prick the skin. This projection is only momentary and the lancet (2), which is captive to the spring (3), is pulled back as the spring (3) reverts to a recovery position where the needle tip is safe inside the barrel. The trigger (6), although broken away from the lancet, remains captive to the barrel by the enlargement (11). The lancet cannot again be operated to eject the needle and the pricker is then intended to be discarded.
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Citations
17 Claims
- 1. A skin pricker comprising a lancet spring loaded in such a manner as to be releasable from a primed rearward position so as momentarily to project its tip from the forward end of a barrel and then retract it, wherein the lancet is formed integrally with a trigger that projects outwardly through an aperture in the forward end of the barrel, there being a shearable bridge within the barrel between the trigger and the lancet, and wherein, in manufacture, the barrel is closed around the lancet to form the aperture and capture the trigger, which keeps the spring means primed, the actuation of the trigger shearing the bridge and releasing the lancet.
Specification