# US 2014/0155925 A1 · Device for treatments with endoscopic resection/removal of tissues > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155925 A1 - Document ID: US20140155925A1 - Status: Published application - Kind: A1 - Application number: 14/128,879 - Filed: 2012-06-15 - Published: 2014-06-05 - Earliest claimed: 2011-06-22 - Assignees: Frii SA - Inventors: Raffaele Riva - Web page: https://patentgrep.com/patent/US20140155925A1 ## CPC - A61B 17/32002: {with continuously rotating, oscillating or reciprocating cutting instruments} - A61B 17/1622: {Drill handpieces (A61B17/1626, A61B17/1628 take precedence)} - A61B 17/1633: {Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft (A61B17/1644 takes precedence)} - A61B 2017/00473: {Distal part, e.g. tip or head (A61B2017/00464 takes precedence)} - A61B 2017/00477: {Coupling (A61B2017/0046 takes precedence)} - A61B 2017/2927: {the angular position of the head being adjustable with respect to the shaft} - A61B 2017/2948: {Sealing means, e.g. for sealing the interior from fluid entry} - A61B 2217/005: with suction drainage system - A61B 2217/007: with irrigation system - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## Abstract A device for treatments of endoscopic resection/removal of tissues, includes: a hand-piece; an outer tubular element extending along a longitudinal axis having a proximal end, a distal end, and a cutting aperture at the distal end; an inner tubular element housed in rotation in the outer tubular element; the inner tubular element extending along the longitudinal axis and having a proximal end, a distal end and a cutting tip at its distal end; guiding elements including an electric motor and electric supply to rotate and/or oscillate the inner tubular element with respect to the outer tubular element; a first engagement keyed substantially at the proximal end of the inner tubular element; a second engagement keyed on the distal end of the motor's outlet shaft to axially slide theron; and at least one spring element to push the second engagement in engagement with the first engagement. ## Claims ### Claim 1 A device (1) for treatments of endoscopic resection/removal of tissues, comprising: a handpiece (2) able to be handled by a user; an outer tubular element (3) which extends along a longitudinal axis (X-X) comprising a proximal end, a distal end and a cutting aperture, placed at said distal end; an inner tubular element (4) able to be housed in a rotary way in said inner tubular element (3); said inner tubular element extending along a longitudinal axis (X-X) and comprising a proximal end, a distal end and a cutting tip at its distal end; guiding means (5) to rotate and/or oscillate said inner tubular element (4) with respect to said outer tubular element (3); said guiding means comprising an electric motor and electric supply means (20) for said electric motor (19); characterized in that it comprises: a first engagement (7) which is keyed on the inner tubular element (4) substantially at its proximal end of the inner tubular element; a second engagement (8) which is keyed on the distal end of the outlet shaft (17) of the motor, in order to axially slide on the outlet shaft (17) of the motor; said second engagement (8) being shaped in order to couple with said first engagement (7), to drag in a rotary way said inner tubular element (4); at least one spring element (18) in order to push said second engagement (8) in engagement with said first engagement (7). ### Claim 2 (depends on 1) The device (1) according to claim 1, characterized in that said first engagement (7) comprises a first toothed gear (13) comprising a plurality of teeth (14) spaced along a circumference, to form a plurality of seats (15). ### Claim 3 (depends on 2) The device (1) according to claim 2, characterized in that said second engagement comprises a toothed gear comprising a plurality of teeth (29) spaced along a circumference, able to engage with the seats (28) of the first toothed gear (13). ### Claim 4 (depends on 1) The device (1) according to claim 1, characterized in that it comprises a support element (22) which is keyed and fixed through fixing means (24) to said outlet shaft (17) of the motor; said support element (22) being able to drag in a rotary way said second engagement (8). ### Claim 5 (depends on 4) The device (1) according to claim 4, characterized in that said spring means (18) comprise a spring, concentrically mounted on the outlet shaft (17) of the motor, and interposed between said second engagement (8) and said support element (22) in order to exert a push in the longitudinal direction on said second engagement (8). ### Claim 6 (depends on 1) The device (1) according to claim 1, characterized in that it comprises a final stroke element (25) for the longitudinal sliding of said second engagement (8), said final stroke element (25) being mounted on the top of said outlet shaft (17) of the motor, in a distal way with respect to the second engagement (8). ### Claim 7 (depends on 1) The device (1) according to claim 1, characterized in that it comprises at least one front tight element (34) to protect said guiding means from the pollution of the suction liquids. ### Claim 8 (depends on 1) The device (1) according to claim 1, characterized in that it comprises a orientating device, to orientate in at least three angular positions the outer tubular element (3) with respect to the handpiece (2). ### Claim 9 (depends on 8) The device (1) according to the claim 8, characterized in that said orientating device comprises at least one stopping tooth (50) integral with the outer tubular element (3) able to engage in at least three seats (51), radially spaced and made on the handpiece (2). ### Claim 10 (depends on 1) The device (1) according to claim 1, characterized in that it comprises a cooling circuit with a connection to a suction assembly, at least one duct (4) directing the cooling fluid and a suction regulating device. ### Claim 11 (depends on 1) The device (1) according to claim 1, characterized in that said duct directing the cooling fluid to said inner tubular element (4) extends in a longitudinal direction along the handpiece, and it has a substantially elongated section in a direction perpendicular to the longitudinal axis (X-X). ### Claim 12 (depends on 4) The device (1) according to claim 4, characterized in that it comprises a support element (22) which is keyed and fixed through fixing means (24) to said outlet shaft (17) of the motor; said support element (22) being able to drag in a rotary way said second engagement (8). ### Claim 13 (depends on 12) The device (1) according to claim 12, characterized in that said spring means (18) comprise a spring, concentrically mounted on the outlet shaft (17) of the motor, and interposed between said second engagement (8) and said support element (22) in order to exert a push in the longitudinal direction on said second engagement (8).