Low cost disposable lancet
First Claim
1. A safety lancet device, comprising:
- a housing having an aperture and a cam disposed on the inner surface of said housing;
a trigger coupled to said housing, said trigger being movable relative to said housing between a first position and a second position, said trigger further having a tip positioned relative to said cam such that said tip slides over said cam when said trigger is moved from said first position to said second position;
a beam member including a cutting blade, enclosed within said housing and pivotally coupled thereto, said trigger being operative for moving said blade through said aperture when said trigger is moved from said first position to said second position; and
wherein said cam provides a predetermined measure of resistance to the movement of said trigger from said first position to said second position, wherein a user applying a force to said trigger which is sufficient to overcome said predetermined measure of resistance causes said tip of said trigger to slide over said cam and further causes said blade to accelerate through said aperture of said housing to incise the user'"'"'s skin; and
wherein said trigger includes blade retracting means for automatically allowing said blade to retract back into said housing after incising the user'"'"'s skin independent of the user'"'"'s interaction.
5 Assignments
0 Petitions
Accused Products
Abstract
A low cost safety lancet device for creating a skin incision. The lancet contains a unitarily formed plastic body, thereby making the lancet device easy to manufacture at a low cost. The lancet device includes a housing having an internal hollow and a blade beam pivotally disposed within the hollow of the housing for generating an incision in a patient'"'"'s skin. Upon the activation of the device, the blade beam pivots through a predetermined path which causes a blade associated with the blade beam to travel out of an aperture in the housing to incise the patient'"'"'s skin. The device further includes a trigger for propelling the blade through the path and a cam projection disposed within the housing which cooperates with the trigger to accelerate the trigger through the hollow of the housing thereby causing the blade to accelerate through the aperture of the housing. A portion of the trigger then unavoidably deflects to automatically allow the blade to retract back into the hollow of the casing after incising the patient'"'"'s skin.
144 Citations
24 Claims
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1. A safety lancet device, comprising:
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a housing having an aperture and a cam disposed on the inner surface of said housing; a trigger coupled to said housing, said trigger being movable relative to said housing between a first position and a second position, said trigger further having a tip positioned relative to said cam such that said tip slides over said cam when said trigger is moved from said first position to said second position; a beam member including a cutting blade, enclosed within said housing and pivotally coupled thereto, said trigger being operative for moving said blade through said aperture when said trigger is moved from said first position to said second position; and wherein said cam provides a predetermined measure of resistance to the movement of said trigger from said first position to said second position, wherein a user applying a force to said trigger which is sufficient to overcome said predetermined measure of resistance causes said tip of said trigger to slide over said cam and further causes said blade to accelerate through said aperture of said housing to incise the user'"'"'s skin; and wherein said trigger includes blade retracting means for automatically allowing said blade to retract back into said housing after incising the user'"'"'s skin independent of the user'"'"'s interaction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A safety lancet device, comprising:
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a housing having an aperture and a cam disposed on the inner surface of said housing; trigger coupled to said housing, said trigger being movable relative to said housing between a first position and a second position, said trigger further having a tip positioned relative to said cam on said housing such that said tip slides over said cam when said trigger is moved from said first position to said second position; a beam member including a cutting blade enclosed within said housing and pivotally coupled thereto, said trigger being operative for moving said blade through said aperture when said trigger is moved from said first position to said second position; and wherein said cam on said housing cooperates with said tip of said trigger to provide a predetermined measure of resistance to the movement of said trigger from said first position to said second position wherein a user applying a force to said trigger which is sufficient to overcome said resistance causes said tip to slide over said cam and further causes said blade to accelerate through said aperture of said housing to incise the user'"'"'s skin; and wherein said housing includes an indent for receiving a portion of a finger, said aperture being disposed with said indent. - View Dependent Claims (12, 13)
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14. A safety lancet device comprising:
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a housing having an internal hollow and an aperture, said housing further having a cam projection extending into said hollow from said housing; a blade assembly having a beam and a blade disposed on the beam, said blade assembly being disposed within said hollow of said housing for generating an incision in a patient'"'"'s skin, wherein upon the activation of said device, said blade assembly follows a predetermined path which causes said blade to travel out of said aperture in said housing to incise the patient'"'"'s skin and then automatically retract back through said aperture into said hollow of said housing; blade triggering means for propelling said blade assembly through said path, said blade triggering means further having a tip cooperating with said cam projection such that, upon activation of the device, said tip slides along said cam projection and accelerates through said hollow of said housing thereby causing said blade to accelerate through said aperture of said housing; and retractor means comprising a connecting member disposed between said tip and said blade triggering means which flexes as said blade assembly is projected through said path such that said blade assembly is released from said blade triggering means and said blade automatically retracts back into said housing after incising the user'"'"'s skin independent of the user'"'"'s interaction; wherein said cam projection, said blade assembly, and said blade triggering means cooperate together to control the depth of incision and said blade assembly is not visible before and after use by a user. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A safety lancet device, comprising:
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a beam having a free end and a cutting blade disposed adjacent its free end; a first L-shaped member having a straight arm, an end wall, an aperture through its straight arm, and a cam extending from its end wall inwardly toward its straight arm; a second L-shaped member having a straight arm and a resilient end wall terminating in a tip; wherein said beam and said L-shaped members are coupled at a common pivot point, wherein said end walls of said L-shaped members project toward each other;
said beam is disposed between said straight arms of said L-shaped members, with said free end of said beam remaining exposed; and
said blade on said beam faces and is axially aligned with said aperture of said first L-shaped member; andwherein the tip of said second L-shaped member is so disposed relative to said first L-shaped member and said beam such that when a user compresses said L-shaped members toward each other, the tip of said second L-shaped member pushes said free end of said beam toward said first L-shaped member;
said tip biases against said cam to provide a predetermined measure of resistance to the movement of said L-shaped members, wherein a user applying a force sufficient to overcome said resistance causes said tip to slide over said cam and further causes said blade to accelerate through said aperture of said first L-shaped member to incise the user'"'"'s skin; and
wherein said resilient end wall of said second L-shaped member upon contacting said first L-shaped member flexes off said free end of said beam to allow said beam to automatically retract toward the straight arm of said second L-shaped member. - View Dependent Claims (23, 24)
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Specification