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A collapsible driveshaft and method of making the same. The collapsible driveshaft includes a tubular member having first and second portions that are integrally formed as a one-piece member. The first portion has splines formed on an exterior surface thereof. The second, opposite portion has both o

A collapsible driveshaft and method of making the same. The collapsible driveshaft includes a tubular member having first and second portions that are integrally formed as a one-piece member. The first portion has splines formed on an exterior surface thereof. The second, opposite portion has both outer and inner diameters that are greater than the outer diameter of the first portion. The method includes placing a tubular metal blank into a hydroforming die having a die cavity and expanding the blank by pressurizing the interior of the blank with hydroforming fluid. During the hydroforming process, the first portion of the blank is expanded to form splines while the second portion is expanded to form inner and outer diameters that are greater than the outer diameter of the first portion.

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A collapsible driveshaft and method of making the same. The collapsible driveshaft includes a tubular member having first and second portions that are integrally formed as a one-piece member. The first portion has splines formed on an exterior surface thereof. The second, opposite portion has both o

A collapsible driveshaft and method of making the same. The collapsible driveshaft includes a tubular member having first and second portions that are integrally formed as a one-piece member. The first portion has splines formed on an exterior surface thereof. The second, opposite portion has both outer and inner diameters that are greater than the outer diameter of the first portion. The method includes placing a tubular metal blank into a hydroforming die having a die cavity and expanding the blank by pressurizing the interior of the blank with hydroforming fluid. During the hydroforming process, the first portion of the blank is expanded to form splines while the second portion is expanded to form inner and outer diameters that are greater than the outer diameter of the first portion. ,-552 Nov., 1996. "Proceedings of the Advanced Turbine Systems Annual Program Review Meeting", "ATS Materials Support", Michael Karnitz, pp. 553-576, Nov., 1996. "Proceedings of the Advanced Turbine Systems Annual Program Review Meeting", "Land Based Turbine Casting Initiative", Boyd A. Mueller, pp. 577-592, Nov., 1996. "Proceedings of the Advanced Turbine Systems Annual Program Review Meeting", "Turbine Airfoil Manufacturing Technology", Charles S. Kortovich, pp. 593-622, Nov., 1996. "Proceedings of the Advanced Turbine Systems Annual Program Review Meeting", "Hot Corrosion Testing of TBS's", Norman Bornstein, pp. 623-631, Nov., 1996. "Proceedings of the Advanced Turbine Systems Annual Program Review Meeting", "Ceramic Stationary Gas Turbine", Mark van Roode, pp. 633-658, Nov., 1996. "Proceedings of the Advanced Turbine Systems Annual Program Review Meeting", "Western European Status of Ceramics for Gas Turbines", Tibor Bornemisza, pp. 659-670, Nov., 1996. "Proceedings of the Advanced Turbine Systems Annual Program Review Meeting", "Status of Ceramic Gas Turbines in Russia", Mark van Roode, p. 671, Nov., 1996. "Status Report: The U.S. Department of Energy's Advanced Turbine systems Program", facsimile dated Nov., 7, 1996. "Testing Program Results Validate GE's H Gas Turbine -High Efficiency, Low Cost of Electricity and Low Emission", Roger Schonewald and Patrick Marolda, (no date available). "Testing Program Results Validate GE's H Gas Turbine -High Efficiency, Low Cost of Electricity and Low Emissions", Slide Presentation -working draft, (no date available). "The Next Step In H. . . For Low Cost Per kW-Hour Power Generation", LP-1PGE '98. "Utility Advanced Turbine System (ATS) Technology Readiness Tes