Patents by Inventor Charles Dunlap

Charles Dunlap has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10913510
    Abstract: Example brake systems and apparatus for providing pitch control on bicycles are described herein. An example rear brake caliper described herein includes a caliper housing to be coupled to the bicycle. The caliper housing includes a first port to be fluidly coupled to a first fluid line fluidly coupled to a front brake actuator and a second port to be fluidly coupled to a second fluid line fluidly coupled to a front brake caliper. The rear brake caliper also includes a valve between the first port and the second port. The valve is operable to affect fluid flow between the first port and the second port.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: February 9, 2021
    Assignee: SRAM, LLC
    Inventors: Charles Dunlap, III, Brian Jordan
  • Patent number: 10710672
    Abstract: Responsive to a hydraulic piston advancing out of a piston housing in a second brake arm and contacting a piston cam surface of a first brake arm, the second brake arm pivots around a second pivot. As this is happening, a cam surface in the second brake arm lifts a contact surface of a first force transfer member of the first brake arm, imparting torque to the first brake arm which then pivots around a first pivot. The cam surface is shaped to impart synchronous motion to the first and second pad holders. Splitting one of the brake arms with a centering member permits a centering adjust feature.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: July 14, 2020
    Assignee: SRAM, LLC
    Inventors: Charles Dunlap, III, Brian Jordan
  • Patent number: 10626935
    Abstract: A brake rotor has a circumferential brake track disposed about an axis of rotation of the brake rotor. The rotor has an outer peripheral edge circumferentially around the brake rotor. The rotor has two surfaces that face axially outward away from one another and that are on axially opposed sides of the brake rotor. The two surfaces define a thickness therebetween. The rotor has an edge surface facing radially outward on the outer peripheral edge. The rotor has a transition between each of the two surfaces and the edge surface. At least a portion of the edge surface is not perpendicular to the two surfaces in an axial direction.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: April 21, 2020
    Assignee: SRAM, LLC
    Inventors: Kevin Wesling, Yenpang Liu, Charles Dunlap
  • Patent number: 10480601
    Abstract: A brake rotor for a bicycle has a brake body formed of a first material and a cooling element with a cooling body, at least part of which is formed of a second material that has a higher thermal conductivity than the first material. The brake body has a generally annular shape with a first axial contact surface. The cooling body is coupled to the first axial contact surface. The cooling body may be in contact with the first axial contact surface around the brake body for a majority of a circumference of the heat dissipation region. The cooling body may be attached to or be an integral part of a carrier coupled to the brake body. The cooling body may include a protrusion.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: November 19, 2019
    Assignee: SRAM, LLC
    Inventors: Charles Dunlap, Braden Snead
  • Patent number: 10207767
    Abstract: Responsive to a hydraulic piston advancing out of a piston housing in a second brake arm and contacting a piston cam surface of a first brake arm, the second brake arm pivots around a second pivot. As this is happening, a cam surface in the second brake arm lifts a contact surface of a first force transfer member of the first brake arm, imparting torque to the first brake arm which then pivots around a first pivot. The cam surface is shaped to impart synchronous motion to the first and second pad holders. Splitting one of the brake arms with a centering member permits a centering adjust feature.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: February 19, 2019
    Assignee: SRAM, LLC
    Inventors: Charles Dunlap, III, Brian Jordan
  • Publication number: 20190009857
    Abstract: Responsive to a hydraulic piston advancing out of a piston housing in a second brake arm and contacting a piston cam surface of a first brake arm, the second brake arm pivots around a second pivot. As this is happening, a cam surface in the second brake arm lifts a contact surface of a first force transfer member of the first brake arm, imparting torque to the first brake arm which then pivots around a first pivot. The cam surface is shaped to impart synchronous motion to the first and second pad holders. Splitting one of the brake arms with a centering member permits a centering adjust feature.
    Type: Application
    Filed: September 11, 2018
    Publication date: January 10, 2019
    Applicant: SRAM, LLC
    Inventors: Charles Dunlap, III, Brian Jordan
  • Publication number: 20170073035
    Abstract: Responsive to a hydraulic piston advancing out of a piston housing in a second brake arm and contacting a piston cam surface of a first brake arm, the second brake arm pivots around a second pivot. As this is happening, a cam surface in the second brake arm lifts a contact surface of a first force transfer member of the first brake arm, imparting torque to the first brake arm which then pivots around a first pivot. The cam surface is shaped to impart synchronous motion to the first and second pad holders. Splitting one of the brake arms with a centering member permits a centering adjust feature.
    Type: Application
    Filed: September 10, 2015
    Publication date: March 16, 2017
    Applicant: SRAM, LLC
    Inventors: Charles Dunlap, III, Brian Jordan
  • Patent number: 4625399
    Abstract: A method and apparatus are disclosed for adapting a variable center distance electronic component insertion machine to form and insert the leads of components into particularly closed spaced mounting holes of a circuit board.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: December 2, 1986
    Assignee: Universal Instruments Corporation
    Inventors: Albert W. Zemek, Frank J. Orzelek, Charles Dunlap