Patents by Inventor Rifaquat Cheema
Rifaquat Cheema 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: 11162742Abstract: An air fin for a heat exchanger has air channels defined by corrugations, the corrugations having generally planar flanks joined by alternating crests and troughs. Perforations extend through portions of at least some of the flanks and are aligned within two spaced apart planes. A rectangular aperture extends through at least two consecutive ones of the corrugations, and is bounded by the two planes. A method of making the air fin includes forming perforations into a continuous strip of metal sheet at regular intervals, corrugating the strip to form crests and troughs between the perforations, and punching out a portion of the strip at regular intervals. The punching out includes shearing webs between the perforations, and results in the formation of the rectangular aperture.Type: GrantFiled: September 17, 2019Date of Patent: November 2, 2021Assignee: Modine Manufacturing CompanyInventors: Tim Hoepfner, Niko Neub, Rifaquat Cheema, Joseph Scholzen
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Publication number: 20200011614Abstract: An air fin for a heat exchanger has air channels defined by corrugations, the corrugations having generally planar flanks joined by alternating crests and troughs. Perforations extend through portions of at least some of the flanks and are aligned within two spaced apart planes. A rectangular aperture extends through at least two consecutive ones of the corrugations, and is bounded by the two planes. A method of making the air fin includes forming perforations into a continuous strip of metal sheet at regular intervals, corrugating the strip to form crests and troughs between the perforations, and punching out a portion of the strip at regular intervals. The punching out includes shearing webs between the perforations, and results in the formation of the rectangular aperture.Type: ApplicationFiled: September 17, 2019Publication date: January 9, 2020Inventors: Tim Hoepfner, Niko Neub, Rifaquat Cheema, Joseph Scholzen
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Patent number: 10436156Abstract: An air fin for a heat exchanger has air channels defined by corrugations, the corrugations having generally planar flanks joined by alternating crests and troughs. Perforations extend through portions of at least some of the flanks and are aligned within two spaced apart planes. A rectangular aperture extends through at least two consecutive ones of the corrugations, and is bounded by the two planes. A method of making the air fin includes forming perforations into a continuous strip of metal sheet at regular intervals, corrugating the strip to form crests and troughs between the perforations, and punching out a portion of the strip at regular intervals. The punching out includes shearing webs between the perforations, and results in the formation of the rectangular aperture.Type: GrantFiled: November 28, 2017Date of Patent: October 8, 2019Assignee: MODINE MANUFACTURING COMPANYInventors: Tim Hoepfner, Niko Neub, Rifaquat Cheema, Joseph Scholzen
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Publication number: 20180156169Abstract: An air fin for a heat exchanger has air channels defined by corrugations, the corrugations having generally planar flanks joined by alternating crests and troughs. Perforations extend through portions of at least some of the flanks and are aligned within two spaced apart planes. A rectangular aperture extends through at least two consecutive ones of the corrugations, and is bounded by the two planes. A method of making the air fin includes forming perforations into a continuous strip of metal sheet at regular intervals, corrugating the strip to form crests and troughs between the perforations, and punching out a portion of the strip at regular intervals. The punching out includes shearing webs between the perforations, and results in the formation of the rectangular aperture.Type: ApplicationFiled: November 28, 2017Publication date: June 7, 2018Inventors: Tim Hoepfner, Niko Neub, Rifaquat Cheema, Joseph Scholzen
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Patent number: 9243851Abstract: A heat exchanger tube includes protrusions extending into the internal volume to turbulate a fluid flow for improved heat transfer. The protrusions are arranged to provide dimpled and un-dimpled regions in order to provide increased heat transfer together with decreased pressure drop. A method of transferring heat by flowing a fluid into a tube, turbulating the fluid in a dimpled first tube section, developing a thermal boundary layer in an un-dimpled second section, and turbulating the fluid in a dimpled second tube section is also presented.Type: GrantFiled: January 13, 2012Date of Patent: January 26, 2016Assignee: Modine Manufacturing CompanyInventors: Aroon K. Viswanathan, Thomas A. Hunzinger, Rifaquat A. Cheema
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Patent number: 8516699Abstract: A heat exchanger for transferring heat between a first working fluid and a second working fluid, including a pair of spaced apart headers, a number of tubes extending between the pair of headers and providing a flow path for the first working fluid and being positioned along a flow path for the second working fluid, and an insert supportable in one of the tubes and having a fold extending in a direction substantially parallel to the flow path for the first working fluid through the tubes. The fold can define first and second legs of the insert. A dimple can be formed on the first leg and a protrusion can be formed on the second leg opposite to the dimple on the first leg.Type: GrantFiled: November 22, 2011Date of Patent: August 27, 2013Assignee: Modine Manufacturing CompanyInventors: Frank M. Grippe, Rifaquat Cheema, David E. Janke, Robert Barfknecht
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Publication number: 20120180991Abstract: A heat exchanger tube includes protrusions extending into the internal volume to turbulate a fluid flow for improved heat transfer. The protrusions are arranged to provide dimpled and un-dimpled regions in order to provide increased heat transfer together with decreased pressure drop. A method of transferring heat by flowing a fluid into a tube, turbulating the fluid in a dimpled first tube section, developing a thermal boundary layer in an un-dimpled second section, and turbulating the fluid in a dimpled second tube section is also presented.Type: ApplicationFiled: January 13, 2012Publication date: July 19, 2012Inventors: Aroon K. Viswanathan, Thomas A. Hunzinger, Rifaquat A. Cheema
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Publication number: 20120066905Abstract: A heat exchanger for transferring heat between a first working fluid and a second working fluid, including a pair of spaced apart headers, a number of tubes extending between the pair of headers and providing a flow path for the first working fluid and being positioned along a flow path for the second working fluid, and an insert supportable in one of the tubes and having a fold extending in a direction substantially parallel to the flow path for the first working fluid through the tubes. The fold can define first and second legs of the insert. A dimple can be formed on the first leg and a protrusion can be formed on the second leg opposite to the dimple on the first leg.Type: ApplicationFiled: November 22, 2011Publication date: March 22, 2012Inventors: Frank M. Grippe, Rifaquat Cheema, David E. Janke, Robert Barfknecht
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Publication number: 20090250201Abstract: The present invention provides a heat exchanger for transferring heat between a first working fluid and a second working fluid, including a pair of spaced apart headers, a number of tubes extending between the pair of headers and providing a flow path for the first working fluid and being positioned along a flow path for the second working fluid, and an insert supportable in one of the tubes and having a fold extending in a direction substantially parallel to the flow path for the first working fluid through the tubes. The fold can define first and second legs of the insert. A dimple can be formed on the first leg and a protrusion can be formed on the second leg opposite to the dimple on the first leg.Type: ApplicationFiled: April 2, 2008Publication date: October 8, 2009Inventors: Frank M. Grippe, Rifaquat Cheema, David E. Janke, Robert J. Barfknecht
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Patent number: 6590770Abstract: A serpentine, slit fin (26) is provided for a heat sink device (10) used for cooling a electronic component (12) having a surface (14) that rejects heat. The heat sink (10) includes a plate (16) having first and second surfaces (18, 20), with the first surface (18) configured to receive heat from the surface (14) of the electronic component (12). The fin (26) is bonded to the second surface and includes a plurality of offset sidewall portions (48). In one form, a fan (22) is spaced above the second surface (20) to direct an impingement airflow (24) towards the second surface (20) substantially perpendicular to the second surface (20), and the serpentine, slit fin (26) underlies the fan (22) and is bonded to the second surface (20).Type: GrantFiled: March 14, 2002Date of Patent: July 8, 2003Assignee: Modine Manufacturing CompanyInventors: C. James Rogers, Gregory G. Hughes, L. Winston Zhang, Frank M. Grippe, Rifaquat Cheema