Single use lancet assembly
First Claim
Patent Images
1. A single-use lancet assembly comprising:
- a tubular body having a top end with a top opening and a bottom end with a bottom opening;
a lancet disposed in said tubular body, said lancet having an upper end and a lower end, an encapsulating member removably attached to said lower end and encasing a needle tip protruding from said lancet, a bottom flange circumscribing said lancet adjacent said lower end, and an upper flange circumscribing said lancet adjacent said upper end;
a closure attached to said bottom opening of said body and having a central aperture passing therethrough for passage of said encapsulating member;
spring means positioned between said closure and said bottom flange of said lance for urging said lancet away from said closure; and
a cap slidably fitting over said top end of said body, said cap including engagement means extending from an inner surface thereof for engaging said upper flange of said lancet for driving said lancet axially within said body until axial movement is opposed by a predetermined force, said engagement means being deflectable from said upper flange when movement of said lancet is resisted by a said predetermined force, said spring means being effective to retract said lancet needle tip into said body when said engagement means is deflected from said upper end of said lancet.
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Abstract
A single use lancet assembly comprises a housing for holding a manual operable lancet. A cap is slidably positioned on one end of the housing and has a projection for engaging an end of the lancet for driving a needle end of the lancet out of the housing when the cap is depressed. A plastic closure is attached to another end of the housing and has an aperture for passage of the needle. A spring member is integrally molded to the plastic closure for biasing the lancet into the housing. The cap projection and lancet end are constructed so that the projection slips over the lancet and when the lancet engages the closure so as to preclude re-use of the assembly.
124 Citations
14 Claims
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1. A single-use lancet assembly comprising:
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a tubular body having a top end with a top opening and a bottom end with a bottom opening; a lancet disposed in said tubular body, said lancet having an upper end and a lower end, an encapsulating member removably attached to said lower end and encasing a needle tip protruding from said lancet, a bottom flange circumscribing said lancet adjacent said lower end, and an upper flange circumscribing said lancet adjacent said upper end; a closure attached to said bottom opening of said body and having a central aperture passing therethrough for passage of said encapsulating member; spring means positioned between said closure and said bottom flange of said lance for urging said lancet away from said closure; and a cap slidably fitting over said top end of said body, said cap including engagement means extending from an inner surface thereof for engaging said upper flange of said lancet for driving said lancet axially within said body until axial movement is opposed by a predetermined force, said engagement means being deflectable from said upper flange when movement of said lancet is resisted by a said predetermined force, said spring means being effective to retract said lancet needle tip into said body when said engagement means is deflected from said upper end of said lancet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A single use lancet assembly comprising:
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a housing having an axial passageway therethrough; a lancet including a needle molded in situ in a plastic shell, said lancet being adapted and sized for fitting in said passageway in said housing; a cap slidably positioned on a first end of said housing and having at least one internal projection for engaging a first end of said lancet; a plastic closure attached to another end of said housing and having an aperture for passing an end of said needle when said lancet is advanced toward said closure by movement of said cap; and raised, cantilevered plastic spring members integrally molded with said plastic closure for resisting movement of said lancet toward said closure. - View Dependent Claims (12, 13, 14)
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Specification