Patents by Inventor Charles C. Coffin
Charles C. Coffin 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).
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Patent number: 11643301Abstract: This disclosure relates to a system and method for monitoring a sheave bearing condition, and in particular relates to passenger conveyer systems, such as elevator systems, employing the system and method. An example passenger conveyer system includes a suspension member, and a sheave configured to rotate on a bearing. The suspension member is wrapped around at least a portion of the sheave. Further, the system includes a sensor mounted adjacent an end of the suspension member, and a controller configured to determine a condition of the bearing based on an output of the sensor.Type: GrantFiled: October 28, 2019Date of Patent: May 9, 2023Assignee: OTIS ELEVATOR COMPANYInventors: Yan Chen, David R. Polak, Paul R. Braunwart, Zaffir A. Chaudhry, Charles C. Coffin
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Patent number: 11014780Abstract: According to an aspect, an elevator sensor calibration system includes one or more sensors operable to monitor an elevator system, an elevator sensor calibration device, and a computing system. The computing system includes a memory and a processor that collects a plurality of baseline sensor data from the one or more sensors during movement of an elevator component, collects a plurality of disturbance data from the one or more sensors while the elevator component is displaced responsive to contact with the elevator sensor calibration device during movement of the elevator component, and performs analytics model calibration to calibrate a trained model based on one or more response changes between the baseline sensor data and the disturbance data.Type: GrantFiled: July 6, 2017Date of Patent: May 25, 2021Assignee: OTIS ELEVATOR COMPANYInventors: Sudarshan N. Koushik, Paul R. Braunwart, Charles C. Coffin, Teems E. Lovett
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Publication number: 20210122608Abstract: This disclosure relates to a system and method for monitoring a sheave bearing condition, and in particular relates to passenger conveyer systems, such as elevator systems, employing the system and method. An example passenger conveyer system includes a suspension member, and a sheave configured to rotate on a bearing. The suspension member is wrapped around at least a portion of the sheave. Further, the system includes a sensor mounted adjacent an end of the suspension member, and a controller configured to determine a condition of the bearing based on an output of the sensor.Type: ApplicationFiled: October 28, 2019Publication date: April 29, 2021Inventors: Yan Chen, David R. Polak, Paul R. Braunwart, Zaffir A. Chaudhry, Charles C. Coffin
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Patent number: 10988348Abstract: Disclosed is an escalator system that has: an escalator step; and load sensors secured to the escalator step, wherein the load sensors are configured to: sense an escalator loading; and transfer, to an escalator controller, sensor data indicative of the escalator loading.Type: GrantFiled: May 26, 2020Date of Patent: April 27, 2021Assignee: OTIS ELEVATOR COMPANYInventors: Walter Thomas Schmidt, Charles C. Coffin, Shihemn Chen, Enrico Manes, Paul R. Braunwart, Anais Espinal, Kishore K. Reddy, Soumalya Sarkar
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Patent number: 10336581Abstract: The present invention is directed to an elevator system. The elevator system comprises a car, a counterweight, at least one belt connecting the car and counterweight, and at least one sheave having a surface that engages with the belt. At least part of the surface of the sheave that interfaces with the belt has a plurality of features for reducing unwanted noise created due to the interaction between the belt and the sheave surface.Type: GrantFiled: January 21, 2011Date of Patent: July 2, 2019Assignee: OTIS ELEVATOR COMPANYInventors: David R. Polak, Christopher T. Chipman, Charles C Coffin, Arthur Blanc, John P. Wesson, Yan Chen, Daniel G. Opoku, Sergei F. Burlatsky
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Publication number: 20190010019Abstract: According to an aspect, an elevator sensor calibration system includes one or more sensors operable to monitor an elevator system, an elevator sensor calibration device, and a computing system. The computing system includes a memory and a processor that collects a plurality of baseline sensor data from the one or more sensors during movement of an elevator component, collects a plurality of disturbance data from the one or more sensors while the elevator component is displaced responsive to contact with the elevator sensor calibration device during movement of the elevator component, and performs analytics model calibration to calibrate a trained model based on one or more response changes between the baseline sensor data and the disturbance data.Type: ApplicationFiled: July 6, 2017Publication date: January 10, 2019Inventors: Sudarshan N. Koushik, Paul R. Braunwart, Charles C. Coffin, Teems E. Lovett
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Publication number: 20130292211Abstract: The present invention is directed to an elevator system. The elevator system comprises a car, a counterweight, at least one belt connecting the car and counterweight, and at least one sheave having a surface that engages with the belt. At least part of the surface of the sheave that interfaces with the belt has a plurality of features for reducing unwanted noise created due to the interaction between the belt and the sheave surface.Type: ApplicationFiled: January 21, 2011Publication date: November 7, 2013Inventors: David R. Polak, Christopher T. Chipman, Charles C. Coffin, Arthur Blanc, John P. Wesson, Yan Chen, Daniel G. Opoku, Sergei F. Burlatsky
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Publication number: 20100236871Abstract: An elevator door hanger apparatus includes a door hanger configured to be attached to a top portion of a door panel and to at least one movable member and an isolator plate attached to the door hanger and including a lip extending from a bottom of the isolator plate away from the door hanger.Type: ApplicationFiled: November 1, 2007Publication date: September 23, 2010Applicant: OTIS ELEVATOR COMPANYInventors: Jie Xiao, John Ferrisi, Patricia L. Driesch, Charles C Coffin, John P. Wesson
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Patent number: 7569099Abstract: A fuel system for an energy conversion device includes a multiple of non-metallic fuel plates, gaskets, oxygen permeable membranes, porous substrate plates, and vacuum frame plates. Intricate 3-dimension fuel channel structures such as laminar flow impingement elements within the fuel channel dramatically enhance oxygen diffusivity in the FSU. The fuel plates are manufactured from a relatively soft non-metallic material. The non-metallic fuel plates and gasket arrangement provide an effective sealing interface between the fuel plate and oxygen permeable membrane, since compression may be applied to the plates without damaging the relatively delicate oxygen permeable membrane.Type: GrantFiled: January 18, 2006Date of Patent: August 4, 2009Assignee: United Technologies CorporationInventors: Charles C. Coffin, Thomas G. Tillman, He Huang, Brian M. Welch
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Patent number: 7435283Abstract: A fuel stabilization system includes a first deoxygenator and a second deoxygenator both for removing dissolved oxygen from a hydrocarbon fuel. The first and second deoxygenators are arranged in parallel or series to sequentially remove a portion of dissolved oxygen from the hydrocarbon fuel. The arrangement of several deoxygenators for a single fuel stream improves removal of dissolved oxygen and provides for scalability of the fuel system to meet application specific demands. The arrangement also provides for the preservation of partial system functionality in the event of the failure of one of the deoxygenator modules.Type: GrantFiled: May 18, 2005Date of Patent: October 14, 2008Assignee: United Technologies CorporationInventors: Thomas Gregory Tillman, Alexander G. Chen, Catalin G. Fotache, Louis J. Spadaccini, Foster Lamm, Zidu Ma, Lou Chiappetta, Charles C. Coffin, James A. Wilkinson, Brian Welch
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Patent number: 6367581Abstract: A sound absorbing light fixture (42) installed in a surface system, such as an elevator ceiling system (40), of an enclosed interior, such as the interior (32) of an elevator cab (32) is presented. The light fixture (42) comprises a frame (46) disposed in fixed relationship to the surface system, the frame (46) having an interior rear surface and interior side surfaces extending outwardly from the rear surface to define a cavity (50). A light source (48) is supported by the frame (46) within the cavity (50). Additionally, a light diffuser (44) is disposed in fixed relationship to a front portion of the frame (46) between the light source (48) and the enclosed interior. The installed light fixture (42) enhances a sound absorption coefficient, e.g., above 0.6, of the surface system for a predetermined frequency range of sound energy, e.g., 300-600 Hz.Type: GrantFiled: May 25, 2000Date of Patent: April 9, 2002Assignee: Otis Elevator CompanyInventors: Mark E. Marler, Charles C. Coffin, Brad Guilani, Heng-Yi Lai, Patricia A. Derwinski