# US 12,108,962 B2 · Endoscopic treatment device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,108,962 B2 - Document ID: US12108962B2 - Status: Granted - Kind: B2 - Application number: 17/586,336 - Filed: 2022-01-27 - Published: 2022-08-04 - Granted: 2024-10-08 - Earliest claimed: 2021-01-29 - Assignees: Olympus Medical Systems Corp. - Applicants: Olympus Medical Systems Corp. - Inventors: Yusuke Shiota; Chika Miyajima; Hiromasa Kato; Kotaro Yamada; Tomohiro Tsuji - Web page: https://patentgrep.com/patent/US12108962B2 ## CPC - A61B 17/29: Forceps for use in minimally invasive surgery - A61B 17/3478: {Endoscopic needles, e.g. for infusion (biopsy needles A61B10/0233; catheters with injection needles A61M25/0067)} - A61B 18/14: Probes or electrodes therefor - A61B 18/1492: {having a flexible, catheter-like structure, e.g. for heart ablation (A61B18/1477 takes precedence)} - A61B 2017/00269: {endoscopic mucosal resection EMR} - A61B 2017/0034: {adapted to be inserted through a working channel of an endoscope} - A61B 2017/00407: {Ratchet means} - A61B 2017/2939: {Details of linkages or pivot points} - A61B 2017/2948: {Sealing means, e.g. for sealing the interior from fluid entry} - A61B 2017/320084: {Irrigation sleeves} - A61B 2018/00488: {Esophagus} - A61B 2018/00494: {Stomach, intestines or bowel} - A61B 2018/00595: {Cauterization} - A61B 2018/00982: {combined with or comprising means for visual or photographic inspections inside the body, e.g. endoscopes} - A61B 2018/1253: {monopolar} - A61B 2018/1405: {Electrodes having a specific shape} - A61B 2018/1425: {Needle} - A61B 2217/007: with irrigation system - A61B 2218/002: Irrigation - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract An endoscopic treatment device includes a sheath formed from a resin; a flow-passage formation member attached to a distal end portion of the sheath to be rotatable around a longitudinal axis of the sheath; a pair of forceps pieces supported by the flow-passage formation member such that the pair of forceps pieces are able to be opened and closed; a link mechanism connected to the pair of forceps pieces and configured to open and close the pair of forceps pieces; an operation wire extending along the longitudinal axis of the sheath; and a connection member configured to connect a proximal end arm of the link mechanism and the operation wire. ## Claims ### Claim 1 An endoscopic treatment device comprising: a sheath; a passage member attached to a distal end portion of the sheath; a pair of forceps pieces supported by the passage member; a link mechanism connected to the pair of forceps pieces and configured to open and close the pair of forceps pieces; an operation wire extending in the sheath; and a connector configured to connect a proximal end arm of the link mechanism and the operation wire, wherein: the passage member includes: a first hole through which the proximal end arm of the link mechanism is inserted; and an exterior surface configured to form a second hole as a gap between a distal cover of the sheath and the exterior surface, and when the pair of forceps pieces are closed, the proximal end arm comes into contact with the passage member. ### Claim 2 (depends on 1) The endoscopic treatment device according to claim 1, wherein when the pair of forceps pieces are opened, the connector comes into contact with the passage member. ### Claim 3 (depends on 2) The endoscopic treatment device according to claim 2, wherein: when the proximal end arm of the link mechanism is retracted in a direction along a longitudinal axis of the sheath, the proximal end arm comes into contact with the passage member and the pair of forceps pieces are closed, and when the connector is advanced in the direction along the longitudinal axis of the sheath, a distal end portion of the connector comes into contact with the passage member and the pair of forceps pieces are opened. ### Claim 4 (depends on 2) The endoscopic treatment device according to claim 2, wherein the sheath is formed from a resin. ### Claim 5 An endoscopic treatment device comprising: a sheath; a treatment portion provided at a distal end side of the sheath; a passage member provided in a distal end portion of the sheath and having a penetration hole extending along a longitudinal axis of the sheath; an operation member connected to the treatment portion; a first block portion configured to come into contact with a proximal end of the passage member when advancing the operation member; and a second block portion configured to come into contact with a distal end of the passage member when retracting the operation member. ### Claim 6 (depends on 5) The endoscopic treatment device according to claim 5, wherein the first block portion is configured to block a proximal end of the penetration hole by coming into contact with a proximal end surface of the passage member. ### Claim 7 (depends on 5) The endoscopic treatment device according to claim 5, wherein the second block portion is configured to block a distal end of the penetration hole by coming into contact with a distal end surface of the passage member. ### Claim 8 (depends on 5) The endoscopic treatment device according to claim 5, wherein the operation member includes a link mechanism connected to the treatment portion and an operation wire extending along the longitudinal axis of the sheath. ### Claim 9 (depends on 8) The endoscopic treatment device according to claim 8, further comprising: a connector configured to connect a proximal end arm of the link mechanism and the operation wire, wherein the connector includes the first block portion. ### Claim 10 (depends on 9) The endoscopic treatment device according to claim 9, wherein the passage member includes a notch portion configured to form a second liquid supply hole as a gap between a distal end cover of the sheath and the notch portion. ### Claim 11 (depends on 10) The endoscopic treatment device according to claim 10, wherein a lateral hole communicating with the penetration hole is formed in the notch portion. ### Claim 12 (depends on 9) The endoscopic treatment device according to claim 9, wherein the link mechanism includes the second block portion. ### Claim 13 (depends on 9) The endoscopic treatment device according to claim 9, wherein the proximal end arm is inserted into the penetration hole of the passage member. ### Claim 14 (depends on 5) The endoscopic treatment device according to claim 5, wherein the passage member includes a notch portion configured to form a second liquid supply hole as a gap between a distal end cover of the sheath and the notch portion. ### Claim 15 (depends on 5) The endoscopic treatment device according to claim 5, wherein an outer diameter of the first block portion and an outer diameter of the second block portion each are larger than a diameter of the penetration hole and smaller than an inner diameter of the sheath. ### Claim 16 (depends on 9) The endoscopic treatment device according to claim 9, wherein: the treatment portion comprises a pair of forceps, when the pair of forceps are closed, the proximal end arm of the link mechanism comes into contact with the passage member, and when the pair of forceps are opened, a distal end portion of the connector comes into contact with the passage member. ### Claim 17 (depends on 9) The endoscope treatment device according to claim 9, wherein: the treatment portion comprises a pair of forceps, when the proximal end arm of the link mechanism is retracted in a direction along the longitudinal axis of the sheath, the proximal end arm comes into contact with the passage member and the pair of forceps are closed, and when the connector is advanced in the direction along the longitudinal axis of the sheath, a distal end portion of the connector comes into contact with the passage member and the pair of forceps are opened. ### Claim 18 An endoscopic treatment device comprising: a sheath; a pair of forceps pieces provided at a distal end side of the sheath; a support member provided in a distal end portion of the sheath and configured to support the pair of forceps pieces so as to freely open and close the pair of forceps pieces; a first member configured to come into contact with a proximal end of the support member when the pair of forceps pieces are in an open state; and a second member provided at a distal end side of the support member and configured to come into contact with a distal end of the support member when the pair of forceps pieces are in a closed state. ### Claim 19 (depends on 2) The endoscopic treatment device according to claim 2, wherein when the pair of forceps pieces are opened, a distal end portion of the connector comes into contact with the passage member.