# US 10,945,824 B2 · Mechanism for applying high radial force in less-elastic medical devices > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,945,824 B2 - Document ID: US10945824B2 - Status: Granted - Kind: B2 - Application number: 16/136,574 - Filed: 2018-09-20 - Published: 2019-01-17 - Granted: 2021-03-16 - Earliest claimed: 2014-03-28 - Assignees: Cook Medical Technologies LLC - Applicants: Cook Medical Technologies LLC - Inventors: Kasper Klausen - Web page: https://patentgrep.com/patent/US10945824B2 ## CPC - A61F 2/01: Filters implantable into blood vessels - A61F 2/011: {Instruments for their placement or removal} - A61F 2002/016: {made from wire-like elements} - A61F 2230/0023: triangular - A61F 2230/0058: X-shaped - A61F 2230/0067: conical - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract A biodegradable device capable of producing a high radial force is described. Such a force will be created in devices made of relatively inelastic materials that are to be deployed to the vasculature or a body cavity in a patient. As the halves of the devices move together subject to a longitudinal force, at the point where they are in contact and unable to move closer together in the longitudinal direction, a radial force is created. The devices may have a tension element that assists in bringing the device halves together and which may partially and optionally remain within the body of the device. ## Claims ### Claim 1 A medical device for implantation in a body vessel, the medical device having a proximal end and extending to a distal end and defining a longitudinal axis therebetween, the medical device comprising: a first device half comprising: a first collet comprising a first tube and defining a lumen therethrough; and a plurality of struts, each of the plurality of struts comprising a first arm and a second arm connected to the first arm, each first arm having a first end and extending angled away from the longitudinal axis to a second end, each second arm having a third end connected to the second end of the first arm and extending proximally and substantially parallel to the longitudinal axis to a fourth end, a locking element being disposed on at least one first arm, each of the first ends of the first arms being disposed within the lumen of the first tube; a second device half comprising: a second collet comprising a second tube defining a lumen therethrough; and a plurality of struts, each of the plurality of struts having a first arm and a second arm connected to the first arm, each first arm having a first end and extending angled away from the longitudinal axis to a second end, each second arm having a third end connected to the second end of the first arm and extending distally and substantially parallel to the longitudinal axis to a fourth end, a locking element being disposed on at least one first arm, each of the first ends of the first arms being disposed within the lumen of the second tube; and a tensioner having a first end and extending to a second end, the first end of the tensioner being attached to the first collet, the tensioner extending to the second end through the second collet; wherein the locking elements of the first and second device halves are configured to engage one another. ### Claim 2 (depends on 1) The medical device of claim 1 wherein the first device half and the second device half have a conical shape comprising an apical end and an open portion opposite the apical end, the second ends of the first arms being arranged circumferentially about the open portion. ### Claim 3 (depends on 2) The medical device of claim 2 wherein the first ends of the struts of the device halves converge at the apical end of each conical shape. ### Claim 4 (depends on 1) The medical device of claim 1 wherein when the first device half and the second device half are moved longitudinally together, the locking elements of the first device half contact the locking elements of the second device half to form a locking interface such that application of a force along a longitudinal axis of the first device half in the distal direction causes the device to exert a force radially outward therefrom. ### Claim 5 (depends on 1) The medical device of claim 1 wherein the struts comprise a polymer. ### Claim 6 (depends on 5) The medical device of claim 5 wherein the polymer comprises at least one of a biodegradable polyester, polyether, or polyurethane. ### Claim 7 (depends on 1) The medical device of claim 1 wherein the first collet and the second collet each comprise a biodegradable polymer. ### Claim 8 (depends on 1) The medical device of claim 1 wherein the second collet further comprises a tensioner-retaining groove for retaining a portion of the tensioner. ### Claim 9 (depends on 1) The medical device of claim 1, wherein the first tube extends from a first tube end to a second tube end, and the first collet comprises a first cap at the first tube end. ### Claim 10 (depends on 9) The medical device of claim 9, wherein the first end of the tensioner is attached to the first cap. ### Claim 11 (depends on 1) The medical device of claim 1, wherein the second tube extends from a first tube end to a second tube end, and the second collet comprises a second cap at the second tube end. ### Claim 12 (depends on 11) The medical device of claim 11, wherein the second cap defines an aperture therethrough, the tensioner being sized to fit through the aperture. ### Claim 13 A medical device for implantation in a body vessel, the medical device having a proximal end and extending to a distal end and defining a longitudinal axis therebetween, the medical device comprising: a first device half comprising: a first collet comprising a first tube and defining a lumen therethrough; and a plurality of struts, each of the plurality of struts comprising a first arm and a second arm connected to the first arm, each first arm having a first end and extending angled away from the longitudinal axis to a second end, each second arm having a third end connected to the second end of the first arm and extending proximally and substantially parallel to the longitudinal axis to a fourth end, a locking element being disposed on at least one first arm, each of the first ends of the first arms being disposed within the lumen of the first tube; a second device half comprising: a second collet comprising a second tube defining a lumen therethrough; and a plurality of struts, each of the plurality of struts having a first arm and a second arm connected to the first arm, each first arm having a first end and extending angled away from the longitudinal axis to a second end, each second arm having a third end connected to the second end of the first arm and extending distally and substantially parallel to the longitudinal axis to a fourth end, a locking element being disposed on at least one first arm, each of the first ends of the first arms being disposed within the lumen of the second tube; and a tensioner having a first end and extending to a second end, the first end of the tensioner being attached to the first collet, the tensioner extending to the second end through the second collet; wherein the second collet further comprises a tensioner-retaining groove for retaining a portion of the tensioner. ### Claim 14 (depends on 13) The medical device of claim 13 wherein the first device half and the second device half have a conical shape comprising an apical end and an open portion opposite the apical end, the second ends of the first arms being arranged circumferentially about the open portion. ### Claim 15 (depends on 14) The medical device of claim 14 wherein the first ends of the struts of the device halves converge at the apical end of each conical shape. ### Claim 16 (depends on 13) The medical device of claim 13 wherein when the first device half and the second device half are moved longitudinally together, the locking elements of the first device half contact the locking elements of the second device half to form a locking interface such that application of a force along a longitudinal axis of the first device half in the distal direction causes the device to exert a force radially outward therefrom. ### Claim 17 A medical device for implantation in a body vessel, the medical device having a proximal end and extending to a distal end and defining a longitudinal axis therebetween, the medical device comprising: a first device half comprising: a first collet comprising a first tube and defining a lumen therethrough; and a plurality of struts, each of the plurality of struts comprising a first arm and a second arm connected to the first arm, each first arm having a first end and extending angled away from the longitudinal axis to a second end, each second arm having a third end connected to the second end of the first arm and extending proximally and substantially parallel to the longitudinal axis to a fourth end, a locking element being disposed on at least one first arm, each of the first ends of the first arms being disposed within the lumen of the first tube; a second device half comprising: a second collet comprising a second tube defining a lumen therethrough; and a plurality of struts, each of the plurality of struts having a first arm and a second arm connected to the first arm, each first arm having a first end and extending angled away from the longitudinal axis to a second end, each second arm having a third end connected to the second end of the first arm and extending distally and substantially parallel to the longitudinal axis to a fourth end, a locking element being disposed on at least one first arm, each of the first ends of the first arms being disposed within the lumen of the second tube; and a tensioner having a first end and extending to a second end, the first end of the tensioner being attached to the first collet, the tensioner extending to the second end through the second collet; wherein the first tube extends from a first tube end to a second tube end, the first collet comprises a first cap at the first tube end, and the first end of the tensioner is attached to the first cap. ### Claim 18 (depends on 17) The medical device of claim 17 wherein the first device half and the second device half have a conical shape comprising an apical end and an open portion opposite the apical end, the second ends of the first arms being arranged circumferentially about the open portion. ### Claim 19 (depends on 18) The medical device of claim 18 wherein the first ends of the struts of the device halves converge at the apical end of each conical shape. ### Claim 20 (depends on 17) The medical device of claim 17 wherein when the first device half and the second device half are moved longitudinally together, the locking elements of the first device half contact the locking elements of the second device half to form a locking interface such that application of a force along a longitudinal axis of the first device half in the distal direction causes the device to exert a force radially outward therefrom.