US 10,105,086 B2Granted

Twist-to-charge mechanism of lancing device

AssigneeFacet Technologies, LLC

InventorsJames M. Christopher, Lauren R. Pusey, Jeremy Rodgers

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Abstract

A lancing device includes a housing, a lancet carrier translational within the housing, a drive spring for propelling the lancet carrier through a translational lancing stroke, and a charging mechanism. The charging mechanism includes a first cam member that is rotatable relative to the housing, a second cam member that abuts the first cam member, is coupled to the lancet carrier, and is restricted from rotation relative to the housing, and a rotatable handle co-rotationally attached to the first cam member. Rotation of the handle rotates the first cam member with it, causing the first cam member to rotate against the second cam member, which in response traverses axially because it is restricted from rotation, thereby retracting the lancet carrier to a retracted or charged state.

Claims20

Dependent claims

A lancing device for propelling a lancet through a lancing stroke, the lancing device comprising:

a housing including an axial bore;
a lancet carrier translational within the housing through the lancing stroke, the lancet coupleable to the lancet carrier;
a drive spring for propelling the lancet carrier forward through the lancing stroke, wherein the drive spring comprises a first end and a second end;
and
a charging mechanism including a first cam member, a second cam member, and a rotatable handle, wherein the first cam member is mounted within the housing, rotatable relative to the housing, and restricted from axial translation relative to the housing, the second cam member abuts the first cam member, is coupled to the lancet carrier to provide co-translation, and is restricted from rotation relative to the housing, and the rotatable handle is co-rotationally attached to the first cam member,
wherein rotation of the handle rotates the first cam member therewith, causing the first cam member to rotate against the second cam member, which in response translates the second cam member axially because it is restricted from rotation, thereby retracting the coupled-thereto lancet carrier to a charged position;
and
wherein the first end of the drive spring directly engages the lancet carrier and the second end of the drive spring directly engages the first cam member.

5 more elements

A charging mechanism for a lancing device for propelling a lancet through a lancing stroke, the lancing device comprising a housing including an axial bore, a lancet carrier translational within the housing through the lancing stroke with the lancet coupled to the lancet carrier, and a drive spring for propelling the lancet carrier through the lancing stroke, the charging mechanism comprising:

a first cam member mounted within the housing, rotatable relative to the housing, restricted from axial translation relative to the housing, defining a first cam surface having a peak portion and a helical ramp extending about 180 degrees about an axis of the first cam member, and having an axial bore extending therethrough;
a second cam member abutting the first cam member, coupled to the lancet carrier to provide co-translation, restricted from rotation relative to the housing, and defining a second cam surface having a peak portion;
and
a rotatable handle co-rotationally attached to the first cam member,
wherein rotation of the handle rotates the first cam member therewith, causing the peak portion of the first cam surface to rotate against the second cam surface until it engages the peak portion of the second cam surface, which in response axially translates the second cam member because it is restricted from rotation, thereby retracting the coupled-thereto lancet carrier to a charged position;
and
wherein the second cam member is contained entirely within the axial bore of the first cam member.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/975,892Filed 26 Aug 2013 · us provisional application
Priority: 27 Aug 2012
Published: US 2014/0058428 A127 Feb 2014
Granted: 23 Oct 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61B 5/15117
Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism,…:…
A61B 5/150022
Source of blood: for capillary blood or interstitial fluid
A61B 5/15019
Adjustment of penetration depth: depth adjustment mechanism using movable stops located inside the piercing device housing and limiting the travel…
A61B 5/15029
Manufacture or production processes or steps for blood sampling devices: for driving devices, i.e. means for driving the piercing element