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).
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Patent number: 11971209Abstract: 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: GrantFiled: September 5, 2018Date of Patent: April 30, 2024Assignee: Whirlpool CorporationInventors: Gustavo Frattini, Anna Jedralski, Ashish Nigam, Subrata Shannigrahi
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Patent number: 11859895Abstract: 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: GrantFiled: February 10, 2022Date of Patent: January 2, 2024Assignee: Whirlpool CorporationInventors: Rahul Subhash Chhajed, Narendra Ashok Kapure, Jackson Felipe Karl, Abhay Naik, Abinash Sarma, Subrata Shannigrahi
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Publication number: 20230251026Abstract: 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: ApplicationFiled: February 10, 2022Publication date: August 10, 2023Applicant: Whirlpool CorporationInventors: Rahul Subhash Chhajed, Narendra Ashok Kapure, Jackson Felipe Karl, Abhay Naik, Abinash Sarma, Subrata Shannigrahi
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Publication number: 20230234302Abstract: 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: ApplicationFiled: March 28, 2023Publication date: July 27, 2023Applicant: WHIRLPOOL CORPORATIONInventors: Gregory Edward Bauman, Kevin Jay Cox, Gustavo Frattini, Lynne F. Hunter, Ryan Daniel Kannegieter, Rafael Dutra Nunes, Subrata Shannigrahi
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Patent number: 11623413Abstract: 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: GrantFiled: April 30, 2021Date of Patent: April 11, 2023Assignee: Whirlpool CorporationInventors: Gregory Edward Bauman, Kevin Jay Cox, Gustavo Frattini, Lynne F. Hunter, Ryan Daniel Kannegieter, Rafael Dutra Nunes, Subrata Shannigrahi
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Patent number: 11577446Abstract: 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: GrantFiled: September 11, 2020Date of Patent: February 14, 2023Assignee: Whirlpool CorporationInventors: Paul B. Allard, Dustin M. Miller, Subrata Shannigrahi, Hua Liu
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Patent number: 11519661Abstract: 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: GrantFiled: July 8, 2021Date of Patent: December 6, 2022Assignee: Whirlpool CorporationInventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini
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Publication number: 20220347939Abstract: 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: ApplicationFiled: April 30, 2021Publication date: November 3, 2022Applicant: WHIRLPOOL CORPORATIONInventors: Gregory Edward Bauman, Kevin Jay Cox, Gustavo Frattini, Lynne F. Hunter, Ryan Daniel Kannegieter, Rafael Dutra Nunes, Subrata Shannigrahi
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Patent number: 11435132Abstract: 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: GrantFiled: May 15, 2020Date of Patent: September 6, 2022Assignee: Whirlpool CorporationInventor: Subrata Shannigrahi
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Publication number: 20220055262Abstract: 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: ApplicationFiled: November 8, 2021Publication date: February 24, 2022Applicant: WHIRLPOOL CORPORATIONInventors: Gregory E. Bauman, Lynne F. Hunter, Ryan D. Kannegieter, Sai B. Krishna, Subrata Shannigrahi, Aaron M. Stewart, Eric J. Dherde, Lorraine J. Westlake
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Publication number: 20210372690Abstract: 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: ApplicationFiled: September 5, 2018Publication date: December 2, 2021Applicant: WHIRLPOOL CORPORATIONInventors: Gustavo Frattini, Anna Jedralski, Ashish Nigam, Subrata Shannigrahi
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Publication number: 20210356197Abstract: 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: ApplicationFiled: May 15, 2020Publication date: November 18, 2021Applicant: WHIRLPOOL CORPORATIONInventor: Subrata Shannigrahi
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Publication number: 20210341214Abstract: 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: ApplicationFiled: July 8, 2021Publication date: November 4, 2021Applicant: WHIRLPOOL CORPORATIONInventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini
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Patent number: 11085690Abstract: 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: GrantFiled: January 18, 2017Date of Patent: August 10, 2021Assignee: Whirlpool CorporationInventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini
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Patent number: 11035607Abstract: 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: GrantFiled: January 18, 2017Date of Patent: June 15, 2021Assignee: Whirlpool CorporationInventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini
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Patent number: 11029080Abstract: 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: GrantFiled: January 18, 2017Date of Patent: June 8, 2021Assignee: Whirlpool CorporationInventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini
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Publication number: 20200406527Abstract: A method of fabricating a vacuum insulated appliance structure includes molding 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: ApplicationFiled: September 11, 2020Publication date: December 31, 2020Applicant: WHIRLPOOL CORPORATIONInventors: Paul B. Allard, Dustin M. Miller, Subrata Shannigrahi, Hua Liu
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Patent number: 10807298Abstract: A vacuum insulated appliance structure includes a molded 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: GrantFiled: June 22, 2018Date of Patent: October 20, 2020Assignee: Whirlpool CorporationInventors: Paul B. Allard, Dustin M. Miller, Subrata Shannigrahi, Hua Liu
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Patent number: 10801773Abstract: A structural cabinet for an appliance includes an inner liner that defines an interior compartment, an outer wrapper and a metallic trim breaker that is attached to each of the inner liner and the outer wrapper. The metallic trim breaker includes a plurality of undulating formations that extend an effective length of the trim breaker between the inner liner and the outer wrapper.Type: GrantFiled: December 29, 2018Date of Patent: October 13, 2020Assignee: Whirlpool CorporationInventor: Subrata Shannigrahi
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Publication number: 20200318888Abstract: 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: ApplicationFiled: January 18, 2017Publication date: October 8, 2020Applicant: WHIRLPOOL CORPORATIONInventors: Abhay Naik, Subrata Shannigrahi, Gustavo Frattini