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US4095918: Turbine wheel with catenary blades


Filing Information

Inventor(s) Mouton, Jr.; William J. · David F. Thompson ·
Attorney/Agent(s) Rollin D. Morse ·
Primary Examiner Husar; C. J. ·
Application Number US5746971
Filing date 12/02/1976
Issue date 06/20/1978
Predicted expiration date 06/20/1995
U.S. Classifications 415/7  · 415/121.G  ·
International Classifications F01D 2528  ·
Kind CodeA
International Classifications 4152;4;7;113;122 A ·
Related U.S. Application DataINTRODUCTION
This patent application is a continuation in part of application Ser. No. 622,568, filed Oct. 15, 1975, now abandoned which is a division of application Ser. No. 467,772 filed May 7, 1974, now abandoned, and refiled as application Ser. No. 622,567, issued as U.S. Pat. No. 3,986,787.
Objects of the present invention include the following:
(1) Providing turbine means adequate to harness some of the sun's energy represented in the rainfall collected in large rivers, such as the Mississippi.
(2) Enabling the construction of very large turbine means adequate to energy recovery from large ocean currents such as the Gulf current.
(3) Application of modern technology and materials of construction for the building of large navigable power plants of high efficiency and moderate cost.
(4) Enabling the production of electrical power in large quantities, with precise control of frequency and synchronization such that the power can be merged with conventional electrical power generation systems, despite fluctuations in river flow.
(5) Controlling stresses for best utilization of properties of materials of construction.
(6) Effecting economies in the making of huge structures capable of handling even such currents as that from the Gulf of Mexico.
16 Claims, No Drawings


A turbine wheel on a horizontal axis is coaxially mounted within a primary nozzle, for support in a fluid current below a platform carrying electrical power generation equipment. The turbine wheel and primary nozzle are submerged and oriented to enable flow of a portion of fluid current through the nozzle and past the turbine wheel. The turbine wheel comprises a shroud-ring rim, a set of blades extending inwardly toward the axis, the blades being mounted at their outer ends on the inside of the rim, and at their inner ends on the outside of an axial hub. Each blade has its longitudinal tensile elements shaped in the form of part of a relaxed catenary, extending from rim to hub, with sufficient bow in the direction of force of fluid current on the blade to provide a practical wheel of reasonable cost. Struts and strut vanes supporting hub elements within the nozzle may also be of relaxed catenary configuration.

Independent Claims | See all claims (16)

  1. 1. In a fluid-current motor including an axial-flow turbine wheel having sets of elongated blade structures extending radially from one blade end at a central hub to another end at a blade shroud-ring rim, said shroud ring being retained in a circumferential recess within the throat of a surrounding coaxial nozzle, said nozzle carrying sets of elongated strut structures and sets of elongated strut-vane structures extending inwardly from the inside of the nozzle to any axial wheel-hub-bearing housing associated with said wheel, the improvement comprising: providing at least one of said three sets with preshaped tensile members in the form of relaxed catenaries, with catenary bows lying at least partially in the fluid force directions.
  2. 16.16. A turbine wheel for a fluid current motor, in which the fluid current is generally parallel to the axis of the wheel, the wheel being comprised of a shroud-ring rim, and a set of turbine blades extending generally radially between said axis and said rim, wherein each blade of the said set is bowed in the direction of fluid-current motion into the shape of a relaxed catenary figure.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US818804 Winch Apr 1906
US1868113 SPONTAN AB Ljungstrom Jul 1932
US2085282 AXEL PAULSEN Waterual Jun 1937
US2306840 WILLIAM WATERVAL Waterual Dec 1942
US3487805 SATTERTHWAITE JAMES G Satterthwait et al. Jan 1970
US3501090 GEN ELECTRIC Stoffer et al. Mar 1970
US3655294 MARINE SYSTEMS INC Thatcher Apr 1972
US3695780 Velkoff Oct 1972
US3772886 CAMERON D Cameron Nov 1973
US3986787 Mouton, Jr. et al. Oct 1976

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
FR1037243Apr 1953
DT691482May 1940
UK581956Oct 1946

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US4488055 TOYAMA JAMES James Toyama Dec 1984
US4306157 WRACSARICHT LAZAR J Lazar J. Wracsaricht Dec 1981
US4600360 QUARTERMAN EDWARD A Edward A. Quarterman Jul 1986
US6327957 Wind Eagle Joint Venture J.. Warne Carter, Sr. Dec 2001
US4524285 RAUCH HANS G Hans G. Rauch Jun 1985
US5281856 KENDERI TIBOR Tibor Kenderi Jan 1994
US4205943 VAUTHIER PHILIPPE Philippe Vauthier Jun 1980
EP1183463 Marine Current Turbines Limited Peter FRAENKEL Sep 2004
EP1365106 Minoru Yoshida Minoru Yoshida Aug 2009
EP1567768 Stein HT GmbH Spezialtiefbau Ernst Buttler Apr 2010
US7487637 Stein HT GmbH Spezialtiefbau Ernst Buttler Feb 2009
US7291936 ROBSON JOHN H John H. Robson Nov 2007
US6998730 THARP JOHN E John E. Tharp Feb 2006
US7602076 Peter Fox Sipp Oct 2009
US6955049 KROUSE WAYNE F Wayne F. Krouse Oct 2005
US6652221 Peter Praenkel Nov 2003
US6982498 THARP JOHN E John E. Tharp Jan 2006
US7360993 Marine Current Turbines, Ltd. Peter L. Fraenkel Apr 2008
US6531788 John H. Robson Mar 2003
US6995479 THARP JOHN E John E. Tharp Feb 2006
US6457853 SPX Corporation David Engel Oct 2002
US7872366 R. O'Neal Gray Jan 2011
US7874788 Clean Current Limited Partnership Russell Stothers et al. Jan 2011
US7875992 R. O'Neal Gray Jan 2011
US7042114 John E. Tharp May 2006
US7398963 Blair H. Hills Jul 2008
US7471009 Clean Current Power Systems Inc. Barry V. Davis et al. Dec 2008
US7948109 Grayhawke Applied Technologies R. O'Neal Gray May 2011
US7986054 eGen LLC Joel S. Douglas Jul 2011
US8026625 California Institute of Technology Jack A. Jones et al. Sep 2011
US8022567 Clean Current Limited Partnership Barry V. Davis et al. Sep 2011
US8056887 Blair H. Hills Nov 2011
US8146894 Blair H. Hills Apr 2012
US8146895 Blair H. Hills Apr 2012
US8308422 OpenHydro Group Limited Herbert Williams Nov 2012
US8297923 Kai-Ude Janssen Oct 2012
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