Patents by Inventor Subrata Shannigrahi

Subrata Shannigrahi 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: 20240337429
    Abstract: A refrigeration appliance includes a cabinet having a trim breaker defining a mullion region and a refrigerant system. The cabinet defines a first compartment and a second compartment. The refrigerant system includes a refrigerant defining a flow path through a compressor, a heat loop coupled to the compressor, a condenser coupled to the heat loop, and an evaporator assembly coupled to the compressor and the condenser. The heat loop is routed around a perimeter of the cabinet and through the mullion region. The evaporator assembly includes at least one first evaporator disposed in the first compartment and a second evaporator disposed in the second compartment. The at least one first evaporator may include a first roll bond evaporator coupled to a second roll bond evaporator in series with the first, or a wire-on-tube evaporator.
    Type: Application
    Filed: April 10, 2023
    Publication date: October 10, 2024
    Applicant: WHIRLPOOL CORPORATION
    Inventors: Rahul Subhash Chhajed, Sumedh Sanjay Kokane, Subrata Shannigrahi, Abinash Sarma
  • Publication number: 20240280316
    Abstract: A cabinet for a refrigerator includes: (a) a first inner liner defining a first cavity; (b) a second inner liner defining a second cavity; (c) an outer wrapper at least partially surrounding the first inner liner and the second inner liner; (d) a trim breaker coupling the outer wrapper, the first inner liner, and the second inner liner together, the trim breaker comprising (i) a first opening into the first cavity, (ii) a second opening into the second cavity, and (iii) a transition portion extending between the first opening and the second opening, the transition portion comprising a forward portion and a rear portion; and (e) a vacuum insulated panel disposed proximate the rear portion of the transition portion.
    Type: Application
    Filed: February 21, 2023
    Publication date: August 22, 2024
    Applicant: WHIRLPOOL CORPORATION
    Inventors: Abinash Sarma, Rahul Subhash Chhajed, Subrata Shannigrahi, Vishal Jaywantrao Patil
  • Publication number: 20240271860
    Abstract: A filling system for a vacuum insulated structure includes a powder processor configured to load an internal cavity of the vacuum insulated structure with a heated and at least partially degassed vacuum insulation material. The powder processor includes a hopper with inner and outer hopper walls. The inner hopper wall includes an air permeable surface. A heater is positioned in a space defined between the inner and outer hopper walls. A feed screw is positioned along an inside edge of the inner hopper wall. A vacuum port is positioned on the outer hopper wall. An aperture exit is positioned at a bottom of the hopper. At least one evacuator is coupled to the vacuum port of the powder processor. The at least one evacuator is configured to couple to a vacuum port of the vacuum insulated structure and apply a vacuum to the internal cavity of the vacuum insulated structure.
    Type: Application
    Filed: April 25, 2024
    Publication date: August 15, 2024
    Applicant: WHIRLPOOL CORPORATION
    Inventors: Gustavo Frattini, Anna Jedralski, Ashish Nigam, Subrata Shannigrahi
  • Patent number: 12053937
    Abstract: A method for manufacturing an insulation member for a vacuum insulated structure includes the steps of forming a bag that has an opening using a single layer porous fabric, filling the bag with insulation materials via the opening, sealing the opening of the bag, and vibrating the bag to evenly distribute, de-aerate, and densify the insulation material to form a pillow. The method further includes the steps of compressing the pillow within a mold to define a compressed insulation member, and evacuating the compressed insulation member within an insulated structure to define a vacuum insulated structure.
    Type: Grant
    Filed: March 28, 2023
    Date of Patent: August 6, 2024
    Assignee: Whirlpool Corporation
    Inventors: Gregory Edward Bauman, Kevin Jay Cox, Gustavo Frattini, Lynne F. Hunter, Ryan Daniel Kannegieter, Rafael Dutra Nunes, Subrata Shannigrahi
  • Patent number: 11971209
    Abstract: A filling system for a vacuum insulated structure is provided having a powder processor including a hopper having an inner hopper wall and an outer hopper wall. The filling system also includes a vacuum insulated structure having a liner positioned inside a wrapper, a trim breaker coupling an outer liner edge and an outer wrapper edge to form a shell defining an internal cavity with at least one gas permeable feature positioned in the internal cavity configured to help apply a vacuum. A loading port is positioned on a surface of the shell. The powder processor loads the shell with a heated and at least partially degassed vacuum insulation material through the loading port while a vacuum is applied to the shell through the at least one gas permeable feature.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: April 30, 2024
    Assignee: Whirlpool Corporation
    Inventors: Gustavo Frattini, Anna Jedralski, Ashish Nigam, Subrata Shannigrahi
  • Patent number: 11859895
    Abstract: A refrigeration unit includes a cabinet, a door coupled to the cabinet, at least one gasket coupled to the door, and a heat loop conduit. The cabinet includes a front perimeter that surrounds an opening to a storage compartment within the cabinet. The door is operable between an open position to provide access to the storage compartment and a closed position to conceal the opening to the storage compartment. The at least one gasket is configured to be compressed between the door and the front perimeter of the cabinet in the closed position of the door. The heat loop conduit has a first conduit portion that extends around a majority of the opening along the front perimeter of the cabinet and a second conduit portion that extends around the majority of the opening along the front perimeter of the cabinet.
    Type: Grant
    Filed: February 10, 2022
    Date of Patent: January 2, 2024
    Assignee: Whirlpool Corporation
    Inventors: Rahul Subhash Chhajed, Narendra Ashok Kapure, Jackson Felipe Karl, Abhay Naik, Abinash Sarma, Subrata Shannigrahi
  • Publication number: 20230251026
    Abstract: A refrigeration unit includes a cabinet, a door coupled to the cabinet, at least one gasket coupled to the door, and a heat loop conduit. The cabinet includes a front perimeter that surrounds an opening to a storage compartment within the cabinet. The door is operable between an open position to provide access to the storage compartment and a closed position to conceal the opening to the storage compartment. The at least one gasket is configured to be compressed between the door and the front perimeter of the cabinet in the closed position of the door. The heat loop conduit has a first conduit portion that extends around a majority of the opening along the front perimeter of the cabinet and a second conduit portion that extends around the majority of the opening along the front perimeter of the cabinet.
    Type: Application
    Filed: February 10, 2022
    Publication date: August 10, 2023
    Applicant: Whirlpool Corporation
    Inventors: Rahul Subhash Chhajed, Narendra Ashok Kapure, Jackson Felipe Karl, Abhay Naik, Abinash Sarma, Subrata Shannigrahi
  • Publication number: 20230234302
    Abstract: A method for manufacturing an insulation member for a vacuum insulated structure includes the steps of forming a bag that has an opening using a single layer porous fabric, filling the bag with insulation materials via the opening, sealing the opening of the bag, and vibrating the bag to evenly distribute, de-aerate, and densify the insulation material to form a pillow. The method further includes the steps of compressing the pillow within a mold to define a compressed insulation member, and evacuating the compressed insulation member within an insulated structure to define a vacuum insulated structure.
    Type: Application
    Filed: March 28, 2023
    Publication date: July 27, 2023
    Applicant: WHIRLPOOL CORPORATION
    Inventors: Gregory Edward Bauman, Kevin Jay Cox, Gustavo Frattini, Lynne F. Hunter, Ryan Daniel Kannegieter, Rafael Dutra Nunes, Subrata Shannigrahi
  • Patent number: 11623413
    Abstract: A method for manufacturing an insulation member for an appliance includes the steps of forming a porous bag with a woven fabric, filling the porous bag with insulation materials, heat sealing the porous bag, vibrating the porous bag to define a pillow, compressing the pillow within a mold to define a compressed insulation member, and evacuating the compressed insulation member within an insulated structure to define a vacuum insulated structure.
    Type: Grant
    Filed: April 30, 2021
    Date of Patent: April 11, 2023
    Assignee: Whirlpool Corporation
    Inventors: Gregory Edward Bauman, Kevin Jay Cox, Gustavo Frattini, Lynne F. Hunter, Ryan Daniel Kannegieter, Rafael Dutra Nunes, Subrata Shannigrahi
  • Patent number: 11577446
    Abstract: A vacuum insulated appliance structure, comprising: a first layer of a first polymer material. A second layer of a second polymer material is molded to (e.g. over) at least a portion of the first layer, and a third layer of a third polymer material is molded to (e.g. over) at least a portion of the second layer to form a first component. At least one of the layers is impervious to one or more gasses. One or more additional components are secured to the first component to form a vacuum cavity. The vacuum cavity is filled with a porous material, and the vacuum cavity is evacuated to form a vacuum.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: February 14, 2023
    Assignee: Whirlpool Corporation
    Inventors: Paul B. Allard, Dustin M. Miller, Subrata Shannigrahi, Hua Liu
  • Patent number: 11519661
    Abstract: An outer wrapper that defines a top wall, a bottom wall, a rear wall, and first and second side walls and includes an inner liner. A trim breaker seals the outer wrapper to the inner liner to define an insulation space. A single vacuum port is disposed on each of the top wall, the bottom wall, and the first and second side walls. A plurality of vacuum ports is disposed on the rear wall. An insulative material is disposed between the outer wrapper and the inner liner. A filter media is disposed proximate each vacuum port such that air can be drawn from the insulation space past the filter media and through each vacuum port.
    Type: Grant
    Filed: July 8, 2021
    Date of Patent: December 6, 2022
    Assignee: Whirlpool Corporation
    Inventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini
  • Publication number: 20220347939
    Abstract: A method for manufacturing an insulation member for an appliance includes the steps of forming a porous bag with a woven fabric, filling the porous bag with insulation materials, heat sealing the porous bag, vibrating the porous bag to define a pillow, compressing the pillow within a mold to define a compressed insulation member, and evacuating the compressed insulation member within an insulated structure to define a vacuum insulated structure.
    Type: Application
    Filed: April 30, 2021
    Publication date: November 3, 2022
    Applicant: WHIRLPOOL CORPORATION
    Inventors: Gregory Edward Bauman, Kevin Jay Cox, Gustavo Frattini, Lynne F. Hunter, Ryan Daniel Kannegieter, Rafael Dutra Nunes, Subrata Shannigrahi
  • Patent number: 11435132
    Abstract: A method for manufacturing a vacuum insulated structure includes adhering a trim breaker to a wrapper and a liner via an adhesive to define an insulated structure. The insulated structure is positioned within an evacuation chamber proximate to a first heater and a second heater. The insulated structure and the evacuation chamber are heated via the first heater and the second heater. The evacuation chamber is evacuated via a first vacuum pump, and the insulated structure is evacuated via a second vacuum pump.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: September 6, 2022
    Assignee: Whirlpool Corporation
    Inventor: Subrata Shannigrahi
  • Publication number: 20220055262
    Abstract: An insulation compaction device includes an insulating structure of an appliance and has an insulating media disposed within an insulating cavity. An operable piston selectively engages the insulating structure and operates to define a selected cavity volume of the insulating cavity and a selected insulation density of the insulating media. A valve is attached to the insulating structure and in a passive state releases gas from the insulating cavity to the exterior during operation of the operable piston. Selective operation of a pump mechanism places the valve in an active state to extract gas from the insulating cavity and define a cavity pressure of the insulating cavity that is less than an equalized pressure. The operable piston and the pump mechanism are at least one of sequentially and simultaneously operable to define a selected piston chamber environment defined by the selected cavity volume and the cavity pressure.
    Type: Application
    Filed: November 8, 2021
    Publication date: February 24, 2022
    Applicant: WHIRLPOOL CORPORATION
    Inventors: Gregory E. Bauman, Lynne F. Hunter, Ryan D. Kannegieter, Sai B. Krishna, Subrata Shannigrahi, Aaron M. Stewart, Eric J. Dherde, Lorraine J. Westlake
  • Publication number: 20210372690
    Abstract: A filling system for a vacuum insulated structure is provided having a powder processor including a hopper having an inner hopper wall and an outer hopper wall. The filling system also includes a vacuum insulated structure having a liner positioned inside a wrapper, a trim breaker coupling an outer liner edge and an outer wrapper edge to form a shell defining an internal cavity with at least one gas permeable feature positioned in the internal cavity configured to help apply a vacuum. A loading port is positioned on a surface of the shell. The powder processor loads the shell with a heated and at least partially degassed vacuum insulation material through the loading port while a vacuum is applied to the shell through the at least one gas permeable feature.
    Type: Application
    Filed: September 5, 2018
    Publication date: December 2, 2021
    Applicant: WHIRLPOOL CORPORATION
    Inventors: Gustavo Frattini, Anna Jedralski, Ashish Nigam, Subrata Shannigrahi
  • Publication number: 20210356197
    Abstract: A method for manufacturing a vacuum insulated structure includes adhering a trim breaker to a wrapper and a liner via an adhesive to define an insulated structure. The insulated structure is positioned within an evacuation chamber proximate to a first heater and a second heater. The insulated structure and the evacuation chamber are heated via the first heater and the second heater. The evacuation chamber is evacuated via a first vacuum pump, and the insulated structure is evacuated via a second vacuum pump.
    Type: Application
    Filed: May 15, 2020
    Publication date: November 18, 2021
    Applicant: WHIRLPOOL CORPORATION
    Inventor: Subrata Shannigrahi
  • Publication number: 20210341214
    Abstract: An outer wrapper that defines a top wall, a bottom wall, a rear wall, and first and second side walls and includes an inner liner. A trim breaker seals the outer wrapper to the inner liner to define an insulation space. A single vacuum port is disposed on each of the top wall, the bottom wall, and the first and second side walls. A plurality of vacuum ports is disposed on the rear wall. An insulative material is disposed between the outer wrapper and the inner liner. A filter media is disposed proximate each vacuum port such that air can be drawn from the insulation space past the filter media and through each vacuum port.
    Type: Application
    Filed: July 8, 2021
    Publication date: November 4, 2021
    Applicant: WHIRLPOOL CORPORATION
    Inventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini
  • Patent number: 11085690
    Abstract: An outer wrapper that defines a top wall, a bottom wall, a rear wall, and first and second side walls and includes an inner liner. A trim breaker seals the outer wrapper to the inner liner to define an insulation space. A single vacuum port is disposed on each of the top wall, the bottom wall, and the first and second side walls. A plurality of vacuum ports is disposed on the rear wall. An insulative material is disposed between the outer wrapper and the inner liner. A filter media is disposed proximate each vacuum port such that air can be drawn from the insulation space past the filter media and through each vacuum port.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: August 10, 2021
    Assignee: Whirlpool Corporation
    Inventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini
  • Patent number: 11035607
    Abstract: An appliance includes an outer wrapper having a plurality of joined walls that define a plurality of vertices and edges. An inner liner is sealed with the outer wrapper to define an insulation space. A vacuum port is disposed on an external surface of the outer wrapper. A channel is in fluid communication with the vacuum port and extends along at least one edge defined by first and second walls of the outer wrapper. An insulative material is disposed between the outer wrapper and the inner liner. A filter media is disposed along the channel such that air can be drawn from the insulation space past the filter media, into the channel, and through each vacuum port.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: June 15, 2021
    Assignee: Whirlpool Corporation
    Inventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini
  • Patent number: 11029080
    Abstract: An appliance includes an outer wrapper having a plurality of walls that define an external surface and an inner liner. A trim breaker seals the outer wrapper to the inner liner to define an insulation space. A vacuum port is disposed on the external surface of the outer wrapper. A channel is in fluid communication with the vacuum port and extends along at least one of the plurality of walls of the outer wrapper. An insulative material is disposed between the outer wrapper and the inner liner. A filter media is disposed along the channel such that air can be drawn from the insulation space past the filter media, into the channel, and through each vacuum port.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: June 8, 2021
    Assignee: Whirlpool Corporation
    Inventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini