Patents by Inventor Keith Calhoun

Keith Calhoun 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).

  • Publication number: 20240140959
    Abstract: Provided herein are compounds according to Formula (I) or a pharmaceutically acceptable salt thereof, wherein R1, R2, R3, R5, and R7 are defined herein. Also provided herein are pharmaceutical compositions comprising a compound of Formula (I) as well as the use of such compounds as M4 receptor agonists.
    Type: Application
    Filed: October 30, 2023
    Publication date: May 2, 2024
    Inventors: Amy CALHOUN, Xin CHEN, Kevin Matthew GARDINIER, Edward Charles HALL, Keith JENDZA, Nancy LABBE-GIGUERE, James Anthony NEEF, Daniel Steven PALACIOS, Ming QIAN, Michael David SHULTZ, Christopher G. THOMSON, Kate Yaping WANG, Fan YANG
  • Patent number: 10941725
    Abstract: The disclosure includes a system that includes an adaptive control module for an engine. The adaptive control module is configured to receive a power input signal and receive, from an engine vibration sensor, a vibration signal indicative of an operating condition of the engine. The adaptive control module is further configured to determine, using a set of control laws, a power demand signal based on inputs including the power input signal and the vibration signal. The adaptive control module is further configured to output the power demand signal to at least one component of the engine.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: March 9, 2021
    Assignee: Rolls-Royce Corporation
    Inventor: Keith Calhoun
  • Publication number: 20180372016
    Abstract: The disclosure includes a system that includes an adaptive control module for an engine. The adaptive control module is configured to receive a power input signal and receive, from an engine vibration sensor, a vibration signal indicative of an operating condition of the engine. The adaptive control module is further configured to determine, using a set of control laws, a power demand signal based on inputs including the power input signal and the vibration signal. The adaptive control module is further configured to output the power demand signal to at least one component of the engine.
    Type: Application
    Filed: June 27, 2017
    Publication date: December 27, 2018
    Inventor: Keith Calhoun
  • Patent number: 9435267
    Abstract: A real-time engine management system having a controller system configured to control demand on a first component of an engine. The controller system is also configured to access a first set of prognostic data about the first component, where the first set of prognostic data includes a remaining lifespan approximation of the first component operating at a present operating condition. The controller system is also configured to identify a temporal length of an engine procedure operating at the present operating condition, alter a current limit constant associated with the first component to increase the remaining lifespan approximation of the first component beyond the temporal length, and implement the current limit constant associated with the first component so that the first component does not fault during the engine procedure.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: September 6, 2016
    Assignees: Rolls-Royce North American Technologies, Inc., Rolls-Royce Corporation
    Inventors: Joseph D. Myer, Richard J. Skertic, Keith A. Calhoun
  • Publication number: 20140277992
    Abstract: A real-time engine management system having a controller system configured to control demand on a first component of an engine. The controller system is also configured to access a first set of prognostic data about the first component, where the first set of prognostic data includes a remaining lifespan approximation of the first component operating at a present operating condition. The controller system is also configured to identify a temporal length of an engine procedure operating at the present operating condition, alter a current limit constant associated with the first component to increase the remaining lifespan approximation of the first component beyond the temporal length, and implement the current limit constant associated with the first component so that the first component does not fault during the engine procedure.
    Type: Application
    Filed: March 11, 2014
    Publication date: September 18, 2014
    Applicants: Rolls-Royce Corporation, Rolls-Royce North American Technologies, Inc.
    Inventors: Joseph D. Myer, Richard J. Skertic, Keith A. Calhoun
  • Publication number: 20130116937
    Abstract: In one embodiment, a method is provided for detecting a fault condition in a drivetrain, including the steps of monitoring torque oscillations at a location along a drivetrain, and detecting at least one fault condition associated with a drivetrain component by evaluating torque oscillation data acquired during the monitoring. In another embodiment, a system is provided for detecting a fault condition in a drivetrain including a torque sensor coupled to a drivetrain component and configured to measure torque at a location along the drivetrain and to generate a torque oscillation signal corresponding to the measured torque, and a controller configured to receive the torque oscillation signal and evaluate the torque oscillation signal to identify at least one fault condition associated with the drivetrain component.
    Type: Application
    Filed: April 27, 2012
    Publication date: May 9, 2013
    Inventors: Keith Calhoun, Robert Kiser, Douglas Adams, Kamran Gul, Nate Yoder, Christopher Bruns, Joseph Yutzy
  • Patent number: 6189569
    Abstract: The faucet housing assembly comprises an escutcheon and an undercover plate. The undercover plate fits into the undersurface of the escutcheon forming a snap-fit engagement, there being no need for any fasteners between the undercover plate and the escutcheon. The escutcheon is secured onto a faucet with fasteners and the undercover plate is assembled into the undersurface of the escutcheon. The base section of the undercover plate includes an opening disposed on each side. A strut abuts the outside edge of each opening. Each strut engages one of a pair of mounting posts extending downward from the undersurface of the escutcheon. An arcuate lip extends from the center arched section of the undercover plate, the arcuate lip being positioned about a spout outlet. The arcuate lip forms an abutting engagement against a pair of rib members positioned about the aerator on the undersurface of the escutcheon, the rib members compressing the arcuate lip.
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: February 20, 2001
    Assignee: Masco Corporation of Indiana
    Inventor: Keith A. Calhoun
  • Patent number: 5606937
    Abstract: A dual oil cooler arrangement for positioning in a tapered coolant flow cavity of a diesel engine block includes a pair of virtually identical oil coolers each of which are elongated and which are positioned in an end-to-end configuration extending substantially the entire length of the diesel engine block. The front oil cooler has a front oil inlet and a rear oil outlet. The rear oil cooler has a rear oil inlet and a forward oil outlet. A flow conduit network connects the oil inlets in a parallel flow pattern with a supply source of oil while the oil outlets are connected with an oil filter. The tapered coolant flow cavity in cooperation with the two oil coolers creates balanced and uniform coolant flow to each cylinder. There is a reduction in conduit bends and contraction and expansion points by this flow network. The two oil outlets are positioned near the midpoint of the engine block and this enables the cooled and filtered oil to be introduced into the main oil rifle at a more centralized location.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: March 4, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventor: Keith A. Calhoun