Lancets
First Claim
1. A lancet comprising a body having a drive head at one end and a projecting needle at the other end, the body having integral webs projecting down both sides towards the location of the tip of the projecting needle, the webs being of undulating form and of a flexible material so as to act as spring members.
2 Assignments
0 Petitions
Accused Products
Abstract
A return spring arrangement for a lancet (6) is provided by a pair of undulating plastic webs (14) formed integrally with the lancet. The undulations of the two webs (14) are shown out of phase with one another. These webs (14) are flexible and thus are caused to concertina when the tips (15) of the webs hit the interior of a lancet holder on release of a drive spring. The energy stored within the collapsed webs (14) is then released to drive the lancet back within the lancet holder. This positive return of the lancet ensures that a needle (5) will retract safely into the lancet holder, after operation, and does not rely on the spring being locked into the lancet holder and onto the lancet.
135 Citations
11 Claims
- 1. A lancet comprising a body having a drive head at one end and a projecting needle at the other end, the body having integral webs projecting down both sides towards the location of the tip of the projecting needle, the webs being of undulating form and of a flexible material so as to act as spring members.
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8-9. -9. (canceled)
Specification