Blood sampling devices
DC CAFCFirst Claim
1. A disposable pricker comprising a body, a lance, spring means acting between the lance and the body so that in a relaxed condition of the spring means the lance is in a first retracted position within the body, a cap for the body providing a passing through which the lance tip can move, a formation within the cap for engaging the lance and urging it to a second retracted position, thereby energizing the spring means, as the cap is fitted, means within the body to engage the cap formation as fitting is completed thereby to release the lance, enabling the spring means to cause momentary projection of the lance tip from the passage, and catch means holding the cap to the body when fitting is completed with the lance tip within the passage.
1 Assignment
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Accused Products
Abstract
A disposable pricker has a body (1,2) lance (4) spring (3) and cap (13) integrally moulded in plastics, the cap being subsequently separable. The lance tip (5) is a needle embedded in the moulding and relatively inaccessible within the body. Formations (17) within the cap compress the spring (3) as the cap is fitted until they are flexed aside by co-operation with abutments (7) within the body. The lance (4) is released and shoots forward for the tip (5) momentarily to project proud of the cap (13). The latter is made captive to the lance (4) during this movement and cannot be removed to repeat the operation. The lance tip (5) thus remains concealed within the cap (13). In another capless version, squeezing the body (31) wedges the lance (36) back until it escapes and is shot forward by a spring (38). On recovery within the body, the lance is blocked from reverting to the position where it can be re-actuated.
358 Citations
5 Claims
- 1. A disposable pricker comprising a body, a lance, spring means acting between the lance and the body so that in a relaxed condition of the spring means the lance is in a first retracted position within the body, a cap for the body providing a passing through which the lance tip can move, a formation within the cap for engaging the lance and urging it to a second retracted position, thereby energizing the spring means, as the cap is fitted, means within the body to engage the cap formation as fitting is completed thereby to release the lance, enabling the spring means to cause momentary projection of the lance tip from the passage, and catch means holding the cap to the body when fitting is completed with the lance tip within the passage.
Specification