# US 12,004,731 B2 · Proximal locking assembly design for dual stent mechanical thrombectomy device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,731 B2 - Document ID: US12004731B2 - Status: Granted - Kind: B2 - Application number: 18/196,228 - Filed: 2023-05-11 - Published: 2023-09-14 - Granted: 2024-06-11 - Earliest claimed: 2019-10-29 - Assignees: Neuravi Limited - Applicants: Neuravi Limited - Inventors: Aidan Duffy; Petrica Stefanov; Brendan Casey - Web page: https://patentgrep.com/patent/US12004731B2 ## CPC - A61B 17/0057: {Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect (sutures A61B17/04; closing rectum or urethra near body surface A61F2/0009)} - A61B 17/221: Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)} - A61B 17/320725: {with radially expandable cutting or abrading elements (A61B17/32075 takes precedence)} - A61B 2017/00477: {Coupling (A61B2017/0046 takes precedence)} - A61B 2017/00619: {Locking means for locking the implement in expanded state} - A61B 2017/00778: {Operations on blood vessels (A61B2017/22097, A61B2017/320741 take precedence)} - A61B 2017/22034: {for gripping the obstruction or the tissue part from inside} - A61B 2017/2212: {having a closed distal end, e.g. a loop} - A61B 2017/2215: {having an open distal end} - A61F 2002/9528: {for retrieval of stents} - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - 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 mechanical locking assembly for an endovascular device, comprising a shaft comprising a main body a shaft comprising a main body and enlarged end, an inner channel component comprising a full collar formed on proximal end of the inner channel component, and an outer cage component comprising a partial collar formed on the outer cage component wherein the full collar of the inner channel component fully surrounds the outer cage component and the partial collar of the outer cage component at least partially surrounds the shaft. ## Claims ### Claim 1 A proximal mechanical locking assembly for a thrombectomy device, comprising: a shaft comprising a main body and enlarged end; an inner channel component comprising a proximal collar; and an outer cage component comprising a proximal strut, the proximal strut comprising a slot opening therethrough, wherein the enlarged end is positioned within the slot opening of the outer cage component and the proximal collar of the inner channel component at least partially surrounds the enlarged end and the slot opening. ### Claim 2 (depends on 1) The proximal mechanical locking assembly of claim 1, wherein the inner channel component is curved. ### Claim 3 (depends on 1) The proximal mechanical locking assembly of claim 1, wherein the outer cage component is curved. ### Claim 4 (depends on 1) The proximal mechanical locking assembly of claim 1, wherein the inner channel component further comprises a second proximal strut. ### Claim 5 (depends on 4) The proximal mechanical locking assembly of claim 4, wherein the proximal collar and the second proximal strut are integrally joined. ### Claim 6 (depends on 1) The proximal mechanical locking assembly of claim 1, wherein the proximal strut is distal to the shaft. ### Claim 7 (depends on 1) The proximal mechanical locking assembly of claim 1, wherein the proximal strut is at a proximal end of the thrombectomy device. ### Claim 8 (depends on 1) The proximal mechanical locking assembly of claim 1, wherein the proximal strut is configured to engage the proximal collar such that the proximal collar, the shaft, and the proximal strut are lockingly engaged by a friction-fit engagement. ### Claim 9 (depends on 8) The proximal mechanical locking assembly of claim 8, wherein the friction-fit engagement prevents the proximal strut from disengaging from the enlarged end of the shaft when the locking assembly is integrally formed into the thrombectomy device. ### Claim 10 (depends on 9) The proximal mechanical locking assembly of claim 9, wherein the friction-fit engagement prevents the proximal strut from disengaging from the enlarged end of the shaft when the locking assembly is under load. ### Claim 11 A joint assembly for an endovascular device, comprising: a shaft comprising a main body and an enlarged end, the enlarged end having a top end and a bottom end; a first proximal strut comprising a first strut slot, wherein the first strut slot engages the top end of the enlarged end of the shaft; a second proximal strut comprising a second strut slot, wherein the second strut slot engages the bottom end of the enlarged end of the shaft; and a locking collar at least partially covering the enlarged end of the shaft, the first strut slot of the first proximal strut, and the second strut slot of the second proximal strut. ### Claim 12 (depends on 11) The joint assembly of claim 11, wherein at least a portion of the enlarged end is received in both the first strut slot and the second strut slot. ### Claim 13 (depends on 11) The joint assembly of claim 11, wherein the locking collar constrains the first proximal strut and the second proximal strut such that the first strut slot and the second strut slot cannot disengage from the enlarged end of the shaft when the joint assembly is loaded into a clot retrieval device and the clot retrieval device is under load. ### Claim 14 (depends on 11) The joint assembly of claim 11, wherein the first and second proximal struts are distal to the shaft and at a proximal end of the endovascular device. ### Claim 15 (depends on 11) The joint assembly of claim 11, wherein the enlarged end of the shaft defines a shaft step with the main body of the shaft. ### Claim 16 (depends on 11) The joint assembly of claim 11, wherein the first and second proximal struts each further comprise a tail. ### Claim 17 A joint assembly for an endovascular device, comprising: a shaft comprising a main body and an enlarged end; a proximal strut comprising a strut slot and at least one strut slit; and a locking collar having a distal face and at least one collar pin protruding from the locking collar near the distal face of the locking collar, wherein the strut slot engages the enlarged end of the shaft, and wherein the proximal strut is configured to flex to permit the strut slit to lockingly engage the at least one collar pin. ### Claim 18 (depends on 17) The joint assembly of claim 17, wherein the proximal strut includes a flexible material. ### Claim 19 (depends on 17) The joint assembly of claim 17, wherein the proximal strut is distal to the shaft and at a proximal end of the endovascular device. ### Claim 20 (depends on 17) The joint assembly of claim 17, wherein the locking collar is configured to constrain the proximal strut relative to the enlarged end of the shaft such that the proximal strut maintains engagement with the enlarged end under a tensile load.