Patents by Inventor Evan Chivington

Evan Chivington 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).

  • Clutch assemblies with balance cavities formed by disc springs
    Patent number: 11773922
    Abstract: Transmissions and clutch assemblies for transmissions are disclosed herein. A transmission includes an input shaft, an output shaft, and a clutch assembly. The input shaft is configured to receive rotational power. The output shaft is configured to transmit rotational power to a load. The clutch assembly is coupled between the input shaft and the output shaft to selectively transmit rotational power therebetween in use of the transmission. The clutch assembly includes a housing, a piston, and a disc spring. The piston is movable relative to the housing and cooperates with the housing to at least partially define a first cavity that is configured to receive hydraulic fluid such that a first centrifugal pressure force is created in use of the clutch assembly. The disc spring is movable relative to the housing.
    Type: Grant
    Filed: October 13, 2021
    Date of Patent: October 3, 2023
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: John L. Tysman, Jason Ellis, Evan Chivington, Mickey Hunt
  • CLUTCH ASSEMBLIES WITH BALANCE CAVITIES FORMED BY DISC SPRINGS
    Publication number: 20220025940
    Abstract: Transmissions and clutch assemblies for transmissions are disclosed herein. A transmission includes an input shaft, an output shaft, and a clutch assembly. The input shaft is configured to receive rotational power. The output shaft is configured to transmit rotational power to a load. The clutch assembly is coupled between the input shaft and the output shaft to selectively transmit rotational power therebetween in use of the transmission. The clutch assembly includes a housing, a piston, and a disc spring. The piston is movable relative to the housing and cooperates with the housing to at least partially define a first cavity that is configured to receive hydraulic fluid such that a first centrifugal pressure force is created in use of the clutch assembly. The disc spring is movable relative to the housing.
    Type: Application
    Filed: October 13, 2021
    Publication date: January 27, 2022
    Inventors: John L. Tysman, Jason Ellis, Evan Chivington, Mickey Hunt
  • Clutch assemblies with balance cavities formed by disc springs
    Patent number: 11215241
    Abstract: Transmissions and clutch assemblies for transmissions are disclosed herein. A transmission includes an input shaft, an output shaft, and a clutch assembly. The input shaft is configured to receive rotational power. The output shaft is configured to transmit rotational power to a load. The clutch assembly is coupled between the input shaft and the output shaft to selectively transmit rotational power therebetween in use of the transmission. The clutch assembly includes a housing, a piston, and a disc spring. The piston is movable relative to the housing and cooperates with the housing to at least partially define a first cavity that is configured to receive hydraulic fluid such that a first centrifugal pressure force is created in use of the clutch assembly. The disc spring is movable relative to the housing.
    Type: Grant
    Filed: January 14, 2021
    Date of Patent: January 4, 2022
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: John L. Tysman, Jason Ellis, Evan Chivington, Mickey Hunt
  • CLUTCH ASSEMBLIES WITH BALANCE CAVITIES FORMED BY DISC SPRINGS
    Publication number: 20210140491
    Abstract: Transmissions and clutch assemblies for transmissions are disclosed herein. A transmission includes an input shaft, an output shaft, and a clutch assembly. The input shaft is configured to receive rotational power. The output shaft is configured to transmit rotational power to a load. The clutch assembly is coupled between the input shaft and the output shaft to selectively transmit rotational power therebetween in use of the transmission. The clutch assembly includes a housing, a piston, and a disc spring. The piston is movable relative to the housing and cooperates with the housing to at least partially define a first cavity that is configured to receive hydraulic fluid such that a first centrifugal pressure force is created in use of the clutch assembly. The disc spring is movable relative to the housing.
    Type: Application
    Filed: January 14, 2021
    Publication date: May 13, 2021
    Inventors: John L. Tysman, Jason Ellis, Evan Chivington, Mickey Hunt
  • Clutch assemblies with balance cavities formed by disc springs
    Patent number: 10895289
    Abstract: Transmissions and clutch assemblies for transmissions are disclosed herein. A transmission includes an input shaft, an output shaft, and a clutch assembly. The input shaft is configured to receive rotational power. The output shaft is configured to transmit rotational power to a load. The clutch assembly is coupled between the input shaft and the output shaft to selectively transmit rotational power therebetween in use of the transmission. The clutch assembly includes a housing, a piston, and a disc spring. The piston is movable relative to the housing and cooperates with the housing to at least partially define a first cavity that is configured to receive hydraulic fluid such that a first centrifugal pressure force is created in use of the clutch assembly. The disc spring is movable relative to the housing.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: January 19, 2021
    Assignee: ALLISON TRANSMISSION, INC.
    Inventors: John L. Tysman, Jason Ellis, Evan Chivington, Mickey Hunt
  • CLUTCH ASSEMBLIES WITH BALANCE CAVITIES FORMED BY DISC SPRINGS
    Publication number: 20200355227
    Abstract: Transmissions and clutch assemblies for transmissions are disclosed herein. A transmission includes an input shaft, an output shaft, and a clutch assembly. The input shaft is configured to receive rotational power. The output shaft is configured to transmit rotational power to a load. The clutch assembly is coupled between the input shaft and the output shaft to selectively transmit rotational power therebetween in use of the transmission. The clutch assembly includes a housing, a piston, and a disc spring. The piston is movable relative to the housing and cooperates with the housing to at least partially define a first cavity that is configured to receive hydraulic fluid such that a first centrifugal pressure force is created in use of the clutch assembly. The disc spring is movable relative to the housing.
    Type: Application
    Filed: May 7, 2019
    Publication date: November 12, 2020
    Inventors: John L. Tysman, Jason Ellis, Evan Chivington, Mickey Hunt