# US 10,766,565 B2 · Bicycle power meter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,565 B2 - Document ID: US10766565B2 - Status: Granted - Kind: B2 - Application number: 16/360,640 - Filed: 2019-03-21 - Published: 2019-07-18 - Granted: 2020-09-08 - Earliest claimed: 2016-04-12 - Assignees: Sram, LLC - Applicants: Sram, LLC - Inventors: John Collen; Ryan Jennings; John Eppen; Owen Anders Britton; Scott McLaughlin - Web page: https://patentgrep.com/patent/US10766565B2 ## CPC - B62M 3/16: Accessories - B62J 45/41: characterised by the type of sensor - G01L 3/108: {involving resistance strain gauges} - B62J 43/30: for providing power to equipment other than for propulsion - B62L 1/005: {constructional features of brake elements, e.g. fastening of brake blocks in their holders} - B62M: RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR {SINGLE-TRACK} CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES (arrangements or mounting of transmissions in vehicles in general B60K; transmission elements per se F16) - B62J: CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) - B62L: BRAKES SPECIALLY ADAPTED FOR CYCLES {(arrangements in cycles for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions B60T8/00)} ## Abstract A power meter for a bicycle includes a body having a torque input section and a torque output section, the body configured to transmit power between the torque input section and the torque output section. The power meter also includes a printed circuit board (“PCB”) having a substrate and at least one strain measurement device which may be attached to the PCB. The power meter may be integrally constructed with a chainring construction. ## Claims ### Claim 1 A chainring structure, comprising: a torque output section comprising at least one sprocket including a plurality of a first type of tooth and a plurality of a second type of tooth, the second type of tooth being axially wider than the first type of tooth; a torque input section configured to attach to a crank assembly; a power meter chamber disposed radially between the torque input section and the torque output section; a power meter disposed in the power meter chamber and having at least one strain measurement device; the torque output section, torque input section, and power meter chamber formed as a unitary single piece. ### Claim 2 (depends on 1) The chainring structure of claim 1, wherein the torque output section includes only a single sprocket. ### Claim 3 (depends on 1) The chainring structure of claim 1, wherein the torque output section, torque input section, and power meter chamber are formed from a same material. ### Claim 4 (depends on 3) The chainring structure of claim 3, wherein the same material is aluminum or an aluminum alloy. ### Claim 5 (depends on 3) The chainring structure of claim 3, wherein the torque output section, torque input section, and power meter chamber are formed through a removal of material from a single piece of the same material. ### Claim 6 (depends on 1) The chainring structure of claim 1, wherein the second type of tooth is configured to interact specifically with an outer link space and plates of a roller drive chain for a bicycle. ### Claim 7 (depends on 6) The chainring structure of claim 6, wherein the second type of tooth includes axial protrusions configured to fill the outer link space of the roller drive chain. ### Claim 8 (depends on 1) The chainring structure of claim 1, wherein the at least one strain measurement device is disposed in the power meter chamber and comprises planar electrical contact surfaces, and the power meter comprises a printed circuit board (“PCB”), the PCB being configured such that strain measurement device planar electrical contact surfaces are disposed facing electrical circuitry contacts of the PCB, the electrical circuitry contacts of the PCB communicatively coupled to both the strain measurement device planar electrical contact surfaces and the circuitry of the PCB. ### Claim 9 (depends on 8) The chainring structure of claim 8, wherein the at least one strain measurement device attachment to the PCB comprises a structural support material. ### Claim 10 (depends on 1) The chainring structure of claim 1, wherein the at least one strain measurement device is a foil or wire type electrical strain gauge. ### Claim 11 (depends on 1) The chainring structure of claim 1, wherein the power meter chamber includes a base surface of a strain measurement section. ### Claim 12 (depends on 11) The chainring structure of claim 11, wherein the at least one strain measurement device is attached to the base surface. ### Claim 13 (depends on 11) The chainring structure of claim 11, wherein the base surface is disposed offset from a center of both of both the first type of teeth and the second type of teeth of the at least one sprocket. ### Claim 14 (depends on 13) The chainring structure of claim 13, wherein the base surface is disposed outboard from the center of both the first type of teeth and the second type of teeth of the at least one sprocket. ### Claim 15 (depends on 11) The chainring structure of claim 11, wherein the at least one strain measurement device is attached to the base surface with an adhesive. ### Claim 16 (depends on 1) The chainring structure of claim 1, wherein the torque input section includes a pairing feature. ### Claim 17 (depends on 16) The chainring structure of claim 16, wherein the torque input section includes a distinct bolted torque transmitting connection including a maximum of eight bolt holes for the bolted torque transmitting connection. ### Claim 18 (depends on 1) The chainring structure of claim 1, wherein the power meter comprises a printed circuit board (“PCB”) having a substrate, and the substrate is of annular construction and disposed in the power meter chamber around the torque input section. ### Claim 19 (depends on 18) The chainring structure of claim 18, wherein the at least one strain measurement device comprises a plurality of strain measurement devices disposed about the torque input section. ### Claim 20 (depends on 18) The chainring structure of claim 18, wherein the at least one strain measurement device is attached to the substrate. ### Claim 21 (depends on 1) The chainring structure of claim 1, wherein a strain measurement section of the power meter chamber comprises at least one strain measurement feature.