# US 11,897,575 B2 · Hydraulic bicycle control device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,897,575 B2 - Document ID: US11897575B2 - Status: Granted - Kind: B2 - Application number: 17/020,354 - Filed: 2020-09-14 - Published: 2021-03-18 - Granted: 2024-02-13 - Earliest claimed: 2019-09-16 - Assignees: Sram, LLC - Applicants: Sram, LLC - Inventors: Chihui Su; Yen-Pang Liu - Web page: https://patentgrep.com/patent/US11897575B2 ## CPC - B62L 3/023: {acting on fluid pressure systems} - 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 brake control device includes a housing, a brake lever, a hydraulic seat and a piston. The housing is formed of a plastic and includes a handlebar mounting portion at an end thereof that is mounted to a bicycle handlebar. The brake lever is pivotably connected to the housing at a pivot of the housing. The hydraulic seat is disposed within the housing and is distal from the handlebar mounting portion. The hydraulic seat is formed of a metal and defines a piston chamber and a hydraulic reservoir therein that are in fluid communication with each other. The piston is movably mounted to the piston chamber in the hydraulic seat, and is operably connected to the brake lever. The plastic of the housing is adhered to the hydraulic seat. ## Claims ### Claim 1 A control device adapted to be mounted to a bicycle handlebar, comprising: a housing formed of a plastic and sized and shaped to be grasped by a user's hand, the housing including a handlebar mounting portion at an end thereof that is configured to be mounted to the bicycle handlebar; a brake lever pivotably connected to the housing at a pivot of the housing; a hydraulic seat disposed within the housing at another end of the housing that is distal from the handlebar mounting portion, the hydraulic seat being formed of a metal and defining a piston chamber and a hydraulic reservoir therein that are in fluid communication with each other; and a piston movably mounted to the piston chamber in the hydraulic seat, and operably connected to the brake lever; wherein the plastic of the housing is molded around and adhered to the hydraulic seat through the molding. ### Claim 2 (depends on 1) The control device as claimed in claim 1, wherein the handlebar mounting portion is configured to be mounted to the bicycle handlebar about a mounting axis of the handlebar mounting portion, the hydraulic seat and the handlebar mounting portion being substantially and respectively located at two opposite sides of an imaginary plane that passes through the pivot of the housing and that is parallel to the mounting axis. ### Claim 3 (depends on 1) The control device as claimed in claim 1, wherein the hydraulic seat further defines an installation hole that is in fluid communication with the piston chamber, the installation hole of the hydraulic seat being adapted for a banjo bolt to be mounted thereto. ### Claim 4 (depends on 1) The control device as claimed in claim 1, wherein the hydraulic seat is fixedly mounted to the housing. ### Claim 5 (depends on 1) The control device as claimed in claim 1, further comprising an adjusting member that is movably mounted to the piston chamber of the hydraulic seat and that is located at one side of the piston opposite to the brake lever, the adjusting member being configured to limit the range of movement of the piston. ### Claim 6 (depends on 5) The control device as claimed in claim 5, wherein the adjusting member threadably engages the hydraulic seat. ### Claim 7 (depends on 1) The control device as claimed in claim 1, further comprising a piston rod that interconnects the piston and the brake lever. ### Claim 8 (depends on 7) The control device as claimed in claim 7, wherein the brake lever has a pivoted portion that is pivotally connected to the housing at the pivot, a connecting portion that is connected to the piston rod, and a pressing portion that is for being depressed by the user, the connecting portion being configured to move away from the hydraulic seat when the pressing portion is depressed to move toward the bicycle handlebar. ### Claim 9 (depends on 7) The control device as claimed in claim 7, wherein the brake lever has a pivoted portion that is pivotally connected to the housing at the pivot, a connecting portion that is connected to the piston rod, and a pressing portion that is for being depressed by the user, the connecting portion being configured to move toward the hydraulic seat when the pressing portion is depressed to move toward the bicycle handlebar. ### Claim 10 A control device adapted to be mounted to a bicycle handlebar, comprising: a housing formed of a first material, sized and shaped to be grasped by a user's hand, and including a handlebar mounting portion that is configured to be mounted to the bicycle handlebar about a mounting axis of the handlebar mounting portion; a brake lever pivotably mounted to the housing at a pivot location of the housing; a hydraulic seat formed as a single piece from a second material and disposed within the housing, the hydraulic seat defining a piston chamber and a hydraulic reservoir therein that are in fluid communication with each other, the hydraulic seat and the handlebar mounting portion being substantially and respectively located at two opposite sides of an imaginary plane that passes through the pivot location of the housing and that is parallel to the mounting axis; and a piston movably mounted to the piston chamber in the hydraulic seat, and operably connected to the brake lever, wherein the housing exists as adhered to the hydraulic seat through use of a molding technique. ### Claim 11 (depends on 10) The control device as claimed in claim 10, wherein the first material is a plastic and the second material is a metal. ### Claim 12 (depends on 10) The control device as claimed in claim 10, wherein the hydraulic seat further defines an installation hole that is in fluid communication with the piston chamber, the installation hole of the hydraulic seat being adapted for a banjo bolt to be mounted thereto. ### Claim 13 (depends on 10) The control device as claimed in claim 10, wherein the hydraulic seat is fixedly mounted to the housing. ### Claim 14 (depends on 10) The control device as claimed in claim 10, further comprising an adjusting member that is movably mounted to the piston chamber of the hydraulic seat and that is located at one side of the piston opposite to the brake lever, the adjusting member being configured to limit the range of movement of the piston. ### Claim 15 (depends on 14) The control device as claimed in claim 14, wherein the adjusting member threadably engages the hydraulic seat. ### Claim 16 (depends on 10) The control device as claimed in claim 10, further comprising a piston rod that interconnects the piston and the brake lever. ### Claim 17 (depends on 16) The control device as claimed in claim 16, wherein the brake lever has a pivoted portion that is pivotally connected to the housing at the pivot location, a connecting portion that is connected to the piston rod, and a pressing portion that is for being depressed by the user, the connecting portion being configured to move away from the hydraulic seat when the pressing portion is depressed to move toward the bicycle handlebar. ### Claim 18 (depends on 16) The control device as claimed in claim 16, wherein the brake lever has a pivoted portion that is pivotally connected to the housing at the pivot location, a connecting portion that is connected to the piston rod, and a pressing portion that is for being depressed by the user, the connecting portion being configured to move toward the hydraulic seat when the pressing portion is depressed to move toward the bicycle handlebar.