Patents by Inventor Scott H. Wittkopp
Scott H. Wittkopp 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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Publication number: 20140069217Abstract: A transmission includes an input member, an output member, first and second transmission input shafts, first and second countershafts, a plurality of co-planar gear sets and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and six forward speed ratios between the input member and the output member.Type: ApplicationFiled: September 12, 2012Publication date: March 13, 2014Applicant: GM Global Technology Operations LLCInventors: Scott H. Wittkopp, Craig S. Ross
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Patent number: 8663054Abstract: A transmission is provided having an input member, an output member, three planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes.Type: GrantFiled: March 24, 2011Date of Patent: March 4, 2014Assignee: GM Global Technology Operations LLCInventors: Andrew W. Phillips, Scott H. Wittkopp, James M. Hart, Clinton E. Carey
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Publication number: 20140057753Abstract: A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes. The torque transmitting devices are each selectively engageable in combinations of at least three to establish a plurality forward speed ratios and at least one reverse speed ratio.Type: ApplicationFiled: August 22, 2012Publication date: February 27, 2014Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: James M. Hart, Andrew W. Phillips, Scott H. Wittkopp
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Patent number: 8636618Abstract: A front wheel drive transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing. Each of the clutches and brakes are located within specific areas defined by the planetary gear sets and the housing walls.Type: GrantFiled: January 27, 2012Date of Patent: January 28, 2014Assignee: GM Global Technology Operations LLCInventors: James M. Hart, Scott H. Wittkopp
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Patent number: 8628442Abstract: A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque-transmitting devices. Further, a hydraulic fluid control circuit is provided for controlling the operation of the plurality of torque-transmitting devices. The hydraulic fluid control circuit receives pressurized hydraulic fluid from an off-axis hydraulic fluid pump and has a plurality of fluid passages disposed in the transmission house, input member and other coupling members.Type: GrantFiled: August 28, 2012Date of Patent: January 14, 2014Assignee: GM Global Technology Operations LLCInventors: Patrick S. Portell, John A. Diemer, James M. Hart, Scott H. Wittkopp, Edwin T. Grochowski, Douglas John Dwenger, Elizabeth I. Wooden, Boris Burgman, Clinton E. Carey, Tejinder Singh
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Patent number: 8578803Abstract: A synchronizer actuation assembly for actuating at least one synchronizer member includes a barrel cam, at least one shift fork, a hydraulic piston assembly, and a motion converter. The barrel cam includes at least one cam groove that circumscribes the barrel cam and defines at least a neutral position and a first engaged position. The at least one shift fork has a first end portion disposed in the at least one cam groove and a second forked end portion. The hydraulic piston assembly includes a housing and a piston disposed in the housing. The motion converter includes a translatable input member engaged with the piston of the hydraulic piston assembly, a rotatable output member rotatably coupled with the barrel cam, and a direction selection mechanism. The translatable input member is selectively rotatably coupled with the rotatable output member in a first rotational direction or a second rotational direction.Type: GrantFiled: July 22, 2010Date of Patent: November 12, 2013Assignee: GM Global Technology Operations LLCInventors: Vijay A. Neelakantan, Bret M. Olson, Scott H. Wittkopp
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Patent number: 8573084Abstract: A transmission is connectable to an input member and includes an output member, first and second shafts, first and second countershafts, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output member.Type: GrantFiled: March 18, 2010Date of Patent: November 5, 2013Assignee: GM Global Technology Operations LLCInventors: Craig S. Ross, Scott H. Wittkopp, Edward W. Mellet
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Patent number: 8556766Abstract: A transmission includes an input and output member, four planetary gear sets each having first, second and third members, five interconnecting members continuously interconnecting members of the four planetary gear sets and six torque transmitting mechanisms selectively engageable to interconnect one of the first members, second members, and third members with at least one of another of the first members, second members, third members, and a stationary member. The torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member.Type: GrantFiled: November 30, 2011Date of Patent: October 15, 2013Assignee: GM Global Technology Operations LLCInventors: Edward W. Mellet, James M. Hart, Andrew W. Phillips, Scott H. Wittkopp
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Patent number: 8550954Abstract: A front wheel drive transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes a sun gear member, a planet carrier member, and a ring gear member. The torque transmitting devices include clutches and brakes arranged within a transmission housing. Each of the clutches and the brakes are located within specific areas defined by the planetary gear sets and the housing walls.Type: GrantFiled: May 24, 2012Date of Patent: October 8, 2013Assignee: GM Global Technology Operations LLCInventors: Clinton E. Carey, Scott H. Wittkopp, James M. Hart, Andrew W. Phillips
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Publication number: 20130260944Abstract: A transmission includes an input and output member, four planetary gear sets each having first, second and third members, five interconnecting members continuously interconnecting members of the four planetary gear sets and six torque transmitting mechanisms selectively engageable to interconnect one of the first members, second members, and third members with at least one of another of the first members, second members, third members, and a stationary member. The torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member.Type: ApplicationFiled: May 24, 2013Publication date: October 3, 2013Inventors: Edward W. Mellet, Scott H. Wittkopp, James M. Hart, Andrew W. Phillips
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Patent number: 8545361Abstract: A transmission includes an input member, an output member, three planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. A first interconnecting member continuously interconnects the third member of the first planetary pear set with the second member of the second planetary gear set. A second interconnecting member continuously interconnects the third member of the second planetary sear set with the third member of the third planetary gear set. The torque transmitting devices include three clutches and two brakes.Type: GrantFiled: July 9, 2010Date of Patent: October 1, 2013Assignee: GM Global Technology Operations LLCInventors: Scott H. Wittkopp, James M. Hart, Andrew W. Phillips, Clinton E. Carey
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Patent number: 8534150Abstract: A transmission includes an input member, an output member, first and second transmission input shafts, first and second countershafts, a plurality of co-planar gear sets and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and eight forward speed ratios between the input member and the output member.Type: GrantFiled: April 27, 2011Date of Patent: September 17, 2013Assignee: GM Global Technology Operations LLCInventors: Edward W. Mellet, Scott H. Wittkopp, Craig S. Ross
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Patent number: 8529395Abstract: A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and six torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes.Type: GrantFiled: October 20, 2011Date of Patent: September 10, 2013Assignee: GM Global Technology Operations LLCInventors: Scott H. Wittkopp, Andrew W. Phillips, James M. Hart, Edward W. Mellet
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Patent number: 8528431Abstract: A transmission includes an input member, an output member, first and second shafts, first and second countershafts, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output member.Type: GrantFiled: March 19, 2010Date of Patent: September 10, 2013Assignee: GM Global Technology Operations LLCInventors: Craig S. Ross, Scott H. Wittkopp, Edward W. Mellet
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Patent number: 8523729Abstract: A transmission includes an input and output member, two planetary gear set assemblies each having first, second, third, and fourth members, one interconnecting members continuously interconnecting a member of the first planetary gear set assembly with a member of the second planetary gear set assembly and six torque transmitting mechanisms selectively engageable to interconnect one of the first members, second members, third members, and fourth members with at least one of the input member and a stationary member. The torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member.Type: GrantFiled: May 20, 2011Date of Patent: September 3, 2013Assignee: GM Global Technology Operations LLCInventors: James M. Hart, Edward W. Mellet, Scott H. Wittkopp
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Patent number: 8512196Abstract: A transmission includes an input and output member, four planetary gear sets each having first, second and third members, five interconnecting members continuously interconnecting members of the four planetary gear sets and six torque transmitting mechanisms selectively engageable to interconnect one of the first members, second members, and third members with at least one of another of the first members, second members, third members, and a stationary member. The torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member.Type: GrantFiled: September 13, 2010Date of Patent: August 20, 2013Assignee: GM Global Technology Operations LLCInventors: Edward W. Mellet, Scott H. Wittkopp, James M. Hart, Andrew W. Phillips
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Patent number: 8505400Abstract: A transmission includes an input member, an output member, first and second shafts, a countershaft, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output member.Type: GrantFiled: March 5, 2010Date of Patent: August 13, 2013Assignee: GM Global Technology Operations LLCInventors: Edward W. Mellet, Scott H. Wittkopp, Craig S. Ross
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Patent number: 8506445Abstract: A torque transmitting device includes a first race, a second race, and a biasing member. The torque transmitting device selectively transmits a torque in a rotational direction between a first member and a second member. The second member includes a surface that defines an annular bore having a decreasing diameter in an axial direction. The second race opposes the first race and includes a surface that opposes the second member and has the decreasing diameter in the axial direction. The first race and the second race define a predetermined torque limit. The biasing element biases the second race against the second member with a predetermined force that contributes to a predetermined holding torque between the surface of the second race and the surface of the second member that is less than the predetermined torque limit.Type: GrantFiled: January 27, 2010Date of Patent: August 13, 2013Assignee: GM Global Technology Operations LLCInventors: Scott H. Wittkopp, James M. Hart, Clinton E. Carey
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Patent number: 8499656Abstract: A transmission is connectable to an input member and includes an output transfer gear, first and second shaft members, first and second countershaft members, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of gears, synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output member.Type: GrantFiled: January 10, 2011Date of Patent: August 6, 2013Assignee: GM Global Technology Operations LLCInventors: Craig S. Ross, Edward W. Mellet, Scott H. Wittkopp
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Patent number: 8495926Abstract: A transmission includes an input member, an output member, first and second shafts, first and second countershafts, a plurality of co-planar gear sets, and a plurality of torque transmitting devices. The torque transmitting devices include a plurality of synchronizer assemblies and a dual clutch assembly. The transmission is operable to provide at least one reverse speed ratio and a plurality of forward speed ratios between the input member and the output member.Type: GrantFiled: March 8, 2010Date of Patent: July 30, 2013Assignee: GM Global Technology Operations LLCInventors: Edward W. Mellet, Craig S. Ross, Scott H. Wittkopp