Patents by Inventor Pradeep Mohan MOHAN DAS
Pradeep Mohan MOHAN DAS 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: 10428697Abstract: A fluid diverter including a cylindrical body and an extension arm is provided. The cylindrical body defines a first fluid passage extending from a first axial end of the cylindrical body and a second fluid passage circumferentially offset from the first fluid passage and extending from a second axial end of the cylindrical body. A seepage orifice is defined in the cylindrical body providing a fluid communication path between the first axial end and the second axial end. The extension arm extends from the cylindrical body and includes a locating receptacle dimensioned to receive a fixing element to rotationally and axially fix the fluid diverter.Type: GrantFiled: September 21, 2016Date of Patent: October 1, 2019Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventors: Debora Manther, John Whitton, Pradeep Mohan Mohan Das
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Patent number: 10221729Abstract: A switchable valve train assembly including a carrier housing defining a hydraulic circuit, a supply assembly, a plurality of rocker shafts, a plurality of separators, and a plurality of rocker arm assemblies is provided. Each one of the plurality of separators divides the rocker shafts into (1) a first chamber extending between a first chamber axial end and the separator, and (2) a second chamber extending between a second chamber axial end and the separator. The plurality of separators each include an orifice defined between the first chamber and the second chamber that provides fluid connection between the first chamber and the second chamber. Locking assemblies of the rocker arm assemblies are selectively actuated based on the supply assembly. The separators ensure that hydraulic fluid within the hydraulic fluid is de-aerated and that the second chambers remain primed with hydraulic fluid for faster actuation of the locking assemblies.Type: GrantFiled: June 15, 2017Date of Patent: March 5, 2019Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventors: Faheem Ahmed, Colin Foster, David Chandler, John Whitton, Debora Manther, Pradeep Mohan Mohan Das, Sumukha Nagaraj
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Patent number: 10190445Abstract: A switchable roller finger follower includes an inner lever, an outer lever pivotably mounted to the inner lever by a pivot axle, and a coupling device. The coupling device includes a coupling pin configured to move between a locked position in which the inner lever and the outer lever are connected together for movement in at least one direction and an unlocked position in which the inner lever is movable relative to the outer lever in the at least one direction. The coupling device also includes a spring configured to bias the coupling pin in the locked or unlocked position. A de-aeration flow path is formed between an oil passage and an opening for allowing air to move out of the oil passage, past the coupling pin, and exit through the opening. The de-aeration flow path switches between being open and closed based on a position of the coupling pin.Type: GrantFiled: September 30, 2016Date of Patent: January 29, 2019Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KGInventors: Pradeep Mohan Mohan Das, Faheem Ahmed, David Chandler
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Patent number: 9945269Abstract: A switchable valve train assembly including a rocker shaft is provided. The rocker shaft includes a first chamber extending between a first axial end and a second axial end of the rocker shaft and a second chamber extending between the first axial end and the second axial end of the rocker shaft. A seepage orifice is defined between the first chamber and the second chamber and provides a fluid connection between the first chamber and the second chamber. The first chamber includes a first actuator port in fluid connection with a first intake port for a hydraulic lash adjuster. The second chamber includes a second actuator port in fluid connection with a second intake port for a locking assembly.Type: GrantFiled: June 7, 2016Date of Patent: April 17, 2018Assignee: Schaeffler Technologies AG & Co. KGInventors: Faheem Ahmed, Colin Foster, David Chandler, John Whitton, Debora Manther, Pradeep Mohan Mohan Das, Sumukha Nagaraj
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Patent number: 9945270Abstract: A hollow rocker shaft including a central opening defined by a radially inner surface and a separator secured in the central opening of the rocker shaft is provided. A radially outer surface of the separator engages the radially inner surface of the rocker shaft via a press-fit. The separator divides the central opening of the rocker shaft into (1) a first chamber extending between a first chamber axial end and the separator, and (2) a second chamber extending between a second chamber axial end and the separator. The separator includes an orifice defined between the first chamber and the second chamber that provides fluid connection between the first chamber and the second chamber.Type: GrantFiled: July 22, 2016Date of Patent: April 17, 2018Assignee: Schaeffler Technologies AG & Co. KGInventors: Faheem Ahmed, Colin Foster, David Chandler, John Whitton, Debora Manther, Pradeep Mohan Mohan Das, Sumukha Nagaraj
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Patent number: 9938862Abstract: A switching hydraulic fluid gallery de-aeration arrangement for a switchable valve arrangement is disclosed. A housing for a hydraulic lash adjuster assembly is positioned in a bore of a cylinder head. The housing includes a first, hydraulic lash adjuster fluid port in a first annular groove, and a second switching hydraulic fluid port in a second annular groove. A top land and a bottom land are positioned next to the annular grooves and each have a primary outer diameter. A middle land is defined axially between the grooves. The middle land has a reduced outer diameter relative to the primary outer diameter, or the bore has an annular groove between the top and bottom lands that defines a restricted flow path between a hydraulic lash adjuster fluid gallery and a switching hydraulic fluid gallery that maintains hydraulic fluid in the switching hydraulic fluid gallery.Type: GrantFiled: August 10, 2016Date of Patent: April 10, 2018Assignee: Schaeffler Technologies AG & Co. KGInventors: David Chandler, Pradeep Mohan Mohan Das, Peter Sailer
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Publication number: 20180094551Abstract: A switchable roller finger follower includes an inner lever, an outer lever pivotably mounted to the inner lever by a pivot axle, and a coupling device. The coupling device includes a coupling pin configured to move between a locked position in which the inner lever and the outer lever are connected together for movement in at least one direction and an unlocked position in which the inner lever is movable relative to the outer lever in the at least one direction. The coupling device also includes a spring configured to bias the coupling pin in the locked or unlocked position. A de-aeration flow path is formed between an oil passage and an opening for allowing air to move out of the oil passage, past the coupling pin, and exit through the opening. The de-aeration flow path switches between being open and closed based on a position of the coupling pin.Type: ApplicationFiled: September 30, 2016Publication date: April 5, 2018Applicant: Schaeffler Technologies AG & Co. KGInventors: Pradeep Mohan Mohan Das, Faheem Ahmed, David Chandler
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Publication number: 20180080349Abstract: A fluid diverter including a cylindrical body and an extension arm is provided. The cylindrical body defines a first fluid passage extending from a first axial end of the cylindrical body and a second fluid passage circumferentially offset from the first fluid passage and extending from a second axial end of the cylindrical body. A seepage orifice is defined in the cylindrical body providing a fluid communication path between the first axial end and the second axial end. The extension arm extends from the cylindrical body and includes a locating receptacle dimensioned to receive a fixing element to rotationally and axially fix the fluid diverter.Type: ApplicationFiled: September 21, 2016Publication date: March 22, 2018Applicant: Schaeffler Technologies AG & Co. KGInventors: Debora MANTHER, John WHITTON, Pradeep Mohan MOHAN DAS
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Publication number: 20180045085Abstract: A switching hydraulic fluid gallery de-aeration arrangement for a switchable valve arrangement is disclosed. A housing for a hydraulic lash adjuster assembly is positioned in a bore of a cylinder head. The housing includes a first, hydraulic lash adjuster fluid port in a first annular groove, and a second switching hydraulic fluid port in a second annular groove. A top land and a bottom land are positioned next to the annular grooves and each have a primary outer diameter. A middle land is defined axially between the grooves. The middle land has a reduced outer diameter relative to the primary outer diameter, or the bore has an annular groove between the top and bottom lands that defines a restricted flow path between a hydraulic lash adjuster fluid gallery and a switching hydraulic fluid gallery that maintains hydraulic fluid in the switching hydraulic fluid gallery.Type: ApplicationFiled: August 10, 2016Publication date: February 15, 2018Applicant: Schaeffler Technologies AG & Co. KGInventors: David CHANDLER, Pradeep Mohan MOHAN DAS, Peter SAILER
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Publication number: 20170350280Abstract: A switchable valve train assembly including a rocker shaft is provided. The rocker shaft includes a first chamber extending between a first axial end and a second axial end of the rocker shaft and a second chamber extending between the first axial end and the second axial end of the rocker shaft. A seepage orifice is defined between the first chamber and the second chamber and provides a fluid connection between the first chamber and the second chamber. The first chamber includes a first actuator port in fluid connection with a first intake port for a hydraulic lash adjuster. The second chamber includes a second actuator port in fluid connection with a second intake port for a locking assembly.Type: ApplicationFiled: June 7, 2016Publication date: December 7, 2017Inventors: Faheem AHMED, Colin FOSTER, David CHANDLER, John WHITTON, Debora MANTHER, Pradeep Mohan MOHAN DAS, Sumukha NAGARAJ
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Publication number: 20170284236Abstract: A switchable valve train assembly including a carrier housing defining a hydraulic circuit, a supply assembly, a plurality of rocker shafts, a plurality of separators, and a plurality of rocker arm assemblies is provided. Each one of the plurality of separators divides the rocker shafts into (1) a first chamber extending between a first chamber axial end and the separator, and (2) a second chamber extending between a second chamber axial end and the separator. The plurality of separators each include an orifice defined between the first chamber and the second chamber that provides fluid connection between the first chamber and the second chamber. Locking assemblies of the rocker arm assemblies are selectively actuated based on the supply assembly. The separators ensure that hydraulic fluid within the hydraulic fluid is de-aerated and that the second chambers remain primed with hydraulic fluid for faster actuation of the locking assemblies.Type: ApplicationFiled: June 15, 2017Publication date: October 5, 2017Applicant: Schaeffler Technologies AG & Co. KGInventors: Faheem AHMED, Colin FOSTER, David CHANDLER, John WHITTON, Debora MANTHER, Pradeep Mohan MOHAN DAS, Sumukha NAGARAJ
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Publication number: 20170022848Abstract: A hollow rocker shaft including a central opening defined by a radially inner surface and a separator secured in the central opening of the rocker shaft is provided. A radially outer surface of the separator engages the radially inner surface of the rocker shaft via a press-fit. The separator divides the central opening of the rocker shaft into (1) a first chamber extending between a first chamber axial end and the separator, and (2) a second chamber extending between a second chamber axial end and the separator. The separator includes an orifice defined between the first chamber and the second chamber that provides fluid connection between the first chamber and the second chamber.Type: ApplicationFiled: July 22, 2016Publication date: January 26, 2017Applicant: Schaeffler Technologies AG & Co. KGInventors: Faheem AHMED, Colin FOSTER, David CHANDLER, John WHITTON, Debora MANTHER, Pradeep Mohan MOHAN DAS, Sumukha NAGARAJ