Patents by Inventor Ralph S. Walker
Ralph S. Walker 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: 9631681Abstract: A gear mechanism for motor vehicles includes a double clutch gear mechanism with two part gear mechanisms and a double clutch which transmits torque from the engine optionally to one of the two part gear mechanisms, with a central disk connected to a drive disk, two outer pressure application plates which are also connected to the drive disk and are moveable in the axial direction relative to the central disk, and friction disks arranged between the central disk and the pressure application plates, wherein the friction disks consist of two support carrier disks arranged parallel to each other and moveably in relation to each other, between which leaf-like spring segments are provided. To eliminate vibration problems which can occur on start-up from standstill, on load-change processes and during the gear change, the leaf-like spring segments have different spring characteristic curves with which a multistage spring characteristic is achieved.Type: GrantFiled: August 13, 2013Date of Patent: April 25, 2017Assignee: FORD GLOBAL TECHNOLOGIES, LLCInventors: Ralph S. Walker, Andreas Tissot, Shawn A. Holland, Johann Kirchhoffer
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Publication number: 20140048372Abstract: A gear mechanism for motor vehicles includes a double clutch gear mechanism with two part gear mechanisms and a double clutch which transmits torque from the engine optionally to one of the two part gear mechanisms, with a central disk connected to a drive disk, two outer pressure application plates which are also connected to the drive disk and are moveable in the axial direction relative to the central disk, and friction disks arranged between the central disk and the pressure application plates, wherein the friction disks consist of two support carrier disks arranged parallel to each other and moveably in relation to each other, between which leaf-like spring segments are provided. To eliminate vibration problems which can occur on start-up from standstill, on load-change processes and during the gear change, the leaf-like spring segments have different spring characteristic curves with which a multistage spring characteristic is achieved.Type: ApplicationFiled: August 13, 2013Publication date: February 20, 2014Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Ralph S. Walker, Andreas Tissot, Shawn A. Holland, Johann Kirchhoffer
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Patent number: 8308609Abstract: A method for controlling a power-off downshift in a powershift transmission includes disengaging the current gear, synchronizing engine speed and a speed of the target gear layshaft by increasing a torque capacity of the target gear clutch, disengaging the clutch, engaging the target gear, and reengaging the clutch.Type: GrantFiled: June 14, 2010Date of Patent: November 13, 2012Assignee: Ford Global Technologies, LLCInventors: Shawn A. Holland, Ralph S. Walker, George Herr, Jeffrey J. Tumavitch, Bradley D. Riedle, Steven C. Meisner, Hong Jiang, Matthew J. Shelton
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Patent number: 8292785Abstract: A method for controlling a torque direction transition in a dual clutch transmission includes decreasing a torque capacity of a transmission input clutch when clutch slip reaches a target slip during a power-off condition, producing a subsequent power-on condition, and increasing torque capacity of said clutch when clutch slip reaches a second target slip.Type: GrantFiled: June 8, 2010Date of Patent: October 23, 2012Assignee: Ford Global Technologies, LLCInventors: Ralph S. Walker, Shawn A. Holland, Terry G. Feldpausch, Bradley D. Riedle
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Publication number: 20110306464Abstract: A method for controlling a power-off downshift in a powershift transmission includes disengaging the current gear, synchronizing engine speed and a speed of the target gear layshaft by increasing a torque capacity of the target gear clutch, disengaging the clutch, engaging the target gear, and reengaging the clutch.Type: ApplicationFiled: June 14, 2010Publication date: December 15, 2011Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Shawn A. Holland, Ralph S. Walker, George Herr, Jeffrey J. Tumavitch, Bradley D. Riedle, Steven C. Meisner, Hong Jiang, Matthew J. Shelton
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Publication number: 20110300991Abstract: A method for controlling a torque direction transition in a dual clutch transmission includes decreasing a torque capacity of a transmission input clutch when clutch slip reaches a target slip during a power-off condition, producing a subsequent power-on condition, and increasing torque capacity of said clutch when clutch slip reaches a second target slip.Type: ApplicationFiled: June 8, 2010Publication date: December 8, 2011Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Ralph S. Walker, Shawn A. Holland, Terry G. Feldpausch, Bradley D. Riedle
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Patent number: 4407280Abstract: A disposable hood of unitary one-piece construction for maintaining a desired gas atmosphere about the head of a patient incorporates a novel attachment means for connecting a flexible conduit or hose to the hood. The hood itself is a generally bubble-shaped chamber molded of a transparent material with the top and sidewalls being joined in arcuate contours so that there are no sharp corners. Flat extension means extend from the bottom of the hood so as to lie flatwise on the bed, and an arcuate ballast member is adapted to fit closely around the hood and on the flat extension means to hold the hood in position on the bed.Type: GrantFiled: June 16, 1981Date of Patent: October 4, 1983Inventors: W. Edgar Trammell, James E. Young, James R. Chidester, Ralph S. Walker
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Patent number: 4337770Abstract: A flow regulating device provides continuous, regulated flow of a medical fluid, as well as intermittent, manually controlled larger flows of fluid to a catheter system. Such apparatus includes a control member having an inlet means adapted to be connected by tubing to a source of medical fluid and an outlet means adapted to be connected by tubing to a catheter. A flexible conduit defines at least a portion of a first passage between the inlet means and outlet means of the control member. A cylindrical, hollow extension extends from the outlet means coaxially within and to about the midsection of the flexible conduit. Positioned in the flexible conduit is valve means adapted to open when the conduit is squeezed, thereby providing the larger, intermittent, manually controlled flow of fluid to the catheter system, and to automatically close when the conduit is released.Type: GrantFiled: April 9, 1981Date of Patent: July 6, 1982Inventors: James E. Young, Ralph S. Walker, James R. Chidester
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Patent number: 4278083Abstract: A flow regulating device provides continuous, regulated flow of a medical fluid, as well as intermittent, manually controlled larger flows of fluid to a catheter system. Such apparatus includes a control member having an inlet means adapted to be connected by tubing to a source of medical fluid and an outlet means adapted to be connected by tubing to a catheter. A flexible conduit defines at least a portion of a first passage between the inlet means and outlet means of the control member. A cylindrical, hollow extension extends from the outlet means coaxially within and to about the midsection of the flexible conduit. Positioned in the flexible conduit is valve means adapted to open when the conduit is squeezed, thereby providing the larger, intermittent, manually controlled flow of fluid to the catheter system, and to automatically close when the conduit is released.Type: GrantFiled: June 7, 1979Date of Patent: July 14, 1981Inventors: James E. Young, Ralph S. Walker, James R. Chidester
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Patent number: 4192303Abstract: A flow regulating device provides continuous, regulated flow of a medical fluid, as well as intermittent, manually controlled larger flows of fluid to a catheter system. Such apparatus includes a control member having an inlet means adapted to be connected by tubing to a source of medical fluid and an outlet means adapted to be connected by tubing to a catheter. A flexible conduit defines at least a portion of a first passage between the inlet means and outlet means of the control member. Positioned in the flexible conduit is valve means adapted to open when the conduit is squeezed, thereby providing the larger, intermittent, manually controlled flow of fluid to the catheter system, and to automatically close when the conduit is released. A second passage in the control member connects the inlet and outlet means, and in combination with flow restriction means therein, provides the continuous, regulated flow of fluid to the catheter system.Type: GrantFiled: June 29, 1978Date of Patent: March 11, 1980Inventors: James E. Young, Ralph S. Walker
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Patent number: D273612Type: GrantFiled: June 15, 1981Date of Patent: April 24, 1984Inventors: Wallace E. Trammell, James E. Young, James R. Chidester, Ralph S. Walker