# US 2017/0284474 A1 · Coupler for a power take-out axle of a gearbox > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0284474 A1 - Document ID: US20170284474A1 - Status: Published application - Kind: A1 - Application number: 15/088,116 - Filed: 2016-04-01 - Published: 2017-10-05 - Earliest claimed: 2016-04-01 - Assignees: Apex Dynamics, Inc. - Applicants: Apex Dynamics, Inc. - Inventors: Robin C.S. CHANG - Web page: https://patentgrep.com/patent/US20170284474A1 ## CPC - F16D 1/076: by clamping together two faces perpendicular to the axis of rotation, e.g. with bolted flanges - F16H 55/17: Toothed wheels (worm wheels F16H55/22; chain wheels F16H55/30) - F16H 57/0025: {with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods} - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F16H: GEARING ## Abstract A coupler is provided for a power-take-out axle of a gearbox. The coupler includes a coupling flange, a pinion, and a threaded bolt. The coupling flange includes a screw hole and the first curvic coupling member that are arranged in a concentric manner. The pinion is connected to a front end of the coupling flange, and includes a countersink hole, teeth and a second curvic coupling member arranged in concentric manner. The threaded bolt is inserted in the screw hole from the front end of the pinion through the countersink hole. Hence, the pinion and the coupling flange are bonded. ## Claims ### Claim 1 A coupler for a take-out axle of a gearbox comprising: a coupling flange (10) comprising a front end, a screw hole (12) made at the front end thereof, and a first curvic coupling member (16) formed at the front end thereof, wherein the screw hole (12) and the first curvic coupling member (16) are arranged in a concentric manner; a pinion (20) connected to the front end of the coupling flange (10) and concentrically formed with a rear end, a second curvic coupling member (26) formed on the rear end thereof corresponding to the first curvic coupling member (16), and a countersink hole (22) made throughout the pinion (20); and a threaded bolt (30) inserted in the screw hole (12) from the front end of the pinion (20) through the countersink hole (22) to bond the pinion (20) and the coupling flange (10) and to engage the first curvic coupling member (16) with the second curvic coupling member (26). ### Claim 2 (depends on 1) The coupler according to claim 1, wherein the pinion (20) further comprises teeth (24) formed on a periphery thereof. ### Claim 3 (depends on 2) The coupler according to claim 2, further comprising a cover (40) fitted in the countersink hole (22), flush with the front end of the pinion (20). ### Claim 4 (depends on 1) The coupler according to claim 1, wherein the coupling flange (10) further comprises teeth (14) formed on a periphery thereof. ### Claim 5 (depends on 4) The coupler according to claim 4, further comprising a cover (40) fitted in the countersink hole (22), flush with the front end of the pinion (20). ### Claim 6 (depends on 1) The coupler according to claim 1, further comprising a cover (40) fitted in the countersink hole (22), flush with the front end of the pinion (20). ### Claim 7 (depends on 1) The coupler according to claim 1, wherein the first curvic coupling member (16) comprises first-type curvic teeth (162) formed at an end thereof and separated from each other, wherein the first-type curvic teeth (162) are selected from the group consisting of straight concave teeth, straight convex teeth, concave-concave teeth, concave-convex teeth, convex-convex teeth or convex-concave teeth. ### Claim 8 (depends on 7) The coupler according to claim 7, wherein the pinion (20) further comprises teeth (24) formed on a periphery thereof. ### Claim 9 (depends on 8) The coupler according to claim 8, further comprising a cover (40) fitted in the countersink hole (22), flush with the front end of the pinion (20). ### Claim 10 (depends on 7) The coupler according to claim 7, wherein the coupling flange (10) further comprises teeth (14) formed on a periphery thereof. ### Claim 11 (depends on 10) The coupler according to claim 10, further comprising a cover (40) fitted in the countersink hole (22), flush with the front end of the pinion (20). ### Claim 12 (depends on 7) The coupler according to claim 7, further comprising a cover (40) fitted in the countersink hole (22), flush with the front end of the pinion (20). ### Claim 13 (depends on 7) The coupler according to claim 7, wherein the second curvic coupling member (26) comprises second-type curvic teeth (262) formed at an end thereof and separated from each other, wherein the second-type curvic teeth (262) are selected from the group consisting of straight concave teeth, straight convex teeth, concave-concave teeth, concave-convex teeth, convex-convex teeth or convex-concave teeth. ### Claim 14 (depends on 13) The coupler according to claim 13, wherein the pinion (20) further comprises teeth (24) formed on a periphery thereof. ### Claim 15 (depends on 14) The coupler according to claim 14, further comprising a cover (40) fitted in the countersink hole (22), flush with the front end of the pinion (20). ### Claim 16 (depends on 13) The coupler according to claim 13, wherein the coupling flange (10) further comprises teeth (14) formed on a periphery thereof. ### Claim 17 (depends on 16) The coupler according to claim 16, further comprising a cover (40) fitted in the countersink hole (22), flush with the front end of the pinion (20). ### Claim 18 (depends on 17) The coupler according to claim 17, further comprising a cover (40) fitted in the countersink hole (22), flush with the front end of the pinion (20).