Patents by Inventor Douglas Spriggs Selsam

Douglas Spriggs Selsam 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).

  • Patent number: 10871149
    Abstract: Multiple horizontal axis type rotors are coaxially attached along the upper section of an elongate torque transmitting tower/driveshaft, The tower/driveshaft projects upward from a cantilevered bearing means, and is bent downwind, until the rotors become sufficiently aligned with the wind to rotate the entire tower/driveshaft, Power is drawn from the shaft at the base. Surface mount, subsurface mount, and marine installations, including a sailboat, are disclosed. Blade-to-blade lashing, and vertical axis rotor blades may also be included. Vertical and horizontal axis type rotor blades may be interconnected along the length of the tower/driveshaft to form a structural lattice, and the central shaft may even be eliminated. Aerodynamic lifting bodies or tails, buoyant lifting bodies, buoyant rotor blades, and methods of influencing the tilt of the rotors, can help elevate the structure. This wind turbine can have as few as one single moving part.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: December 22, 2020
    Inventor: Douglas Spriggs Selsam
  • Publication number: 20190055928
    Abstract: Multiple horizontal axis type rotors are coaxially attached along the upper section of an elongate torque transmitting tower/driveshaft, The tower/driveshaft projects upward from a cantilevered bearing means, and is bent downwind, until the rotors become sufficiently aligned with the wind to rotate the entire tower/driveshaft, Power is drawn from the shaft at the base. Surface mount, subsurface mount, and marine installations, including a sailboat, are disclosed. Blade-to-blade lashing, and vertical axis rotor blades may also be included. Vertical and horizontal axis type rotor blades may be interconnected along the length of the tower/driveshaft to form a structural lattice, and the central shaft may even be eliminated. Aerodynamic lifting bodies or tails, buoyant lifting bodies, buoyant rotor blades, and methods of influencing the tilt of the rotors, can help elevate the structure. This wind turbine can have as few as one single moving part.
    Type: Application
    Filed: July 16, 2018
    Publication date: February 21, 2019
    Inventor: Douglas Spriggs Selsam
  • Patent number: 10024307
    Abstract: Multiple horizontal axis type rotors are coaxially attached along the upper section of an elongate torque transmitting tower/driveshaft. The tower/driveshaft projects upward from a cantilevered bearing means, and is bent downwind, until the rotors become sufficiently aligned with the wind to rotate the entire tower/driveshaft. Power is drawn from the shaft at the base. Surface mount, subsurface mount, and marine installations, including a sailboat, are disclosed. Blade-to-blade lashing, and vertical axis rotor blades may also be included. Vertical and horizontal axis type rotor blades may be interconnected along the length of the tower/driveshaft to form a structural lattice, and the central shaft may even be eliminated. Aerodynamic lifting bodies or tails, buoyant lifting bodies, buoyant rotor blades, and methods of influencing the tilt of the rotors, can help elevate the structure. This wind turbine can have as few as one single moving part.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: July 17, 2018
    Inventor: Douglas Spriggs Selsam
  • Publication number: 20160281677
    Abstract: Multiple horizontal axis type rotors are coaxially attached along the upper section of an elongate torque transmitting tower/driveshaft. The tower/driveshaft projects upward from a cantilevered bearing means, and is bent downwind, until the rotors become sufficiently aligned with the wind to rotate the entire tower/driveshaft. Power is drawn from the shaft at the base. Surface mount, subsurface mount, and marine installations, including a sailboat, are disclosed. Blade-to-blade lashing, and vertical axis rotor blades may also be included. Vertical and horizontal axis type rotor blades may be interconnected along the length of the tower/driveshaft to form a structural lattice, and the central shaft may even be eliminated. Aerodynamic lifting bodies or tails, buoyant lifting bodies, buoyant rotor blades, and methods of influencing the tilt of the rotors, can help elevate the structure. This wind turbine can have as few as one single moving part.
    Type: Application
    Filed: January 28, 2016
    Publication date: September 29, 2016
    Inventor: Douglas Spriggs Selsam
  • Patent number: 9249783
    Abstract: Multiple horizontal axis type rotors are coaxially attached along the upper section of an elongate torque transmitting tower/driveshaft, The tower/driveshaft projects upward from a cantilevered bearing, and is bent downwind, until the rotors become sufficiently aligned with the wind to rotate the entire tower/driveshaft, Power is drawn from the shaft at the base. Surface mount, subsurface mount, and marine installations, including a sailboat, are disclosed. Blade-to-blade lashing, and vertical axis rotor blades may also be included. Vertical and horizontal axis type rotor blades may be interconnected along the length of the tower/driveshaft to form a structural lattice, and the central shaft may even be eliminated. Aerodynamic lifting bodies or tails, buoyant lifting bodies, buoyant rotor blades, and methods of influencing the tilt of the rotors, can help elevate the structure. This wind turbine can have as few as one single moving part.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: February 2, 2016
    Inventor: Douglas Spriggs Selsam
  • Publication number: 20140219799
    Abstract: Multiple horizontal axis type rotors are coaxially attached along the upper section of an elongate torque transmitting tower/driveshaft, The tower/driveshaft projects upward from a cantilevered bearing means, and is bent downwind, until the rotors become sufficiently aligned with the wind to rotate the entire tower/driveshaft, Power is drawn from the shaft at the base. Surface mount, subsurface mount, and marine installations, including a sailboat, are disclosed. Blade-to-blade lashing, and vertical axis rotor blades may also be included. Vertical and horizontal axis type rotor blades may be interconnected along the length of the tower/driveshaft to form a structural lattice, and the central shaft may even be eliminated. Aerodynamic lifting bodies or tails, buoyant lifting bodies, buoyant rotor blades, and methods of influencing the tilt of the rotors, can help elevate the structure. This wind turbine can have as few as one single moving part.
    Type: Application
    Filed: September 25, 2013
    Publication date: August 7, 2014
    Inventor: Douglas Spriggs Selsam
  • Publication number: 20130071228
    Abstract: Co-axial, multi-rotor wind turbines, producing more power than a single rotor of the same diameter, are made even more powerful by increasing driveshaft length and supporting the driveshaft from more than one point. Sacrificing the ability to aim, for the extra length to support additional rotors, results in a more powerful co-axial multi-rotor turbine, especially useful for areas with a predominantly unidirectional wind resource. Ideally the turbine is placed at an offset angle ? (alpha) from the wind direction, which, in combination with proper spacing between rotors, allows fresh wind to reach each rotor, so that all rotors contribute toward rotation of the driveshaft. Placing the driveshaft under tension can raise critical speeds and reduce the number of intermediate supports required. This places the Earth or underlying substrate in compression, making it effectively part of the structure of the turbine, saving cost. Cross-axis and reversible blades may also be incorporated.
    Type: Application
    Filed: June 8, 2012
    Publication date: March 21, 2013
    Inventor: Douglas Spriggs Selsam
  • Patent number: 8197179
    Abstract: Co-axial, multi-rotor wind turbines, producing more power than a single rotor of the same diameter, are made even more powerful by increasing driveshaft length and supporting the driveshaft from more than one point. Sacrificing the ability to aim, for the extra length to support additional rotors, results in a more powerful co-axial multi-rotor turbine, especially useful for areas with a predominantly unidirectional wind resource. Ideally the turbine is placed at an offset angle ? (alpha) from the wind direction, which, in combination with proper spacing between rotors, allows fresh wind to reach each rotor, so that all rotors contribute toward rotation of the driveshaft. Placing the driveshaft under tension can raise critical speeds and reduce the number of intermediate supports required. This places the Earth or underlying substrate in compression, making it effectively part of the structure of the turbine, saving cost. Cross-axis and reversible blades may also be incorporated.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: June 12, 2012
    Inventor: Douglas Spriggs Selsam
  • Patent number: 7063501
    Abstract: A multiplicity of horizontal axis rotors are coaxially attached, at spaced intervals, to an elongate driveshaft. This driveshaft with attached rotors is aimed, not directly into the wind, but at a slightly offset angle, allowing each rotor to encounter a wind stream having fresh wind. That offset angle may be in the vertical plane, horizontal plane, or oblique. The shaft is held with rotational freedom at or near its midsection by a cantilevered bearing means, and drives a load, such as an electrical generator. This cantilevered bearing means, along with the rotor laden driveshaft which it supports, is allowed to pivot, as an entire unit, about the vertical axis of a supporting tower. The generator, brake, support frame, as well as a dedicated counterweight can also serve as a counterweight to help elevate the downwind section of the driveshaft, by pushing downward on the upwind section of the turbine.
    Type: Grant
    Filed: March 27, 2004
    Date of Patent: June 20, 2006
    Inventor: Douglas Spriggs Selsam
  • Patent number: 7008172
    Abstract: A multiplicity of horizontal axis rotors are coaxially attached, at spaced intervals, to an elongate driveshaft. This driveshaft with attached rotors is aimed, not directly into the wind, but at a slightly offset angle, allowing each rotor to encounter a wind stream having fresh wind, substantially undisturbed by the wake of upwind rotors. That offset angle may be in the horizontal plane, and is maintained by a passive arrangement of components that may include a tail. In high winds the turbine is allowed to turn across the wind or furl sideways to protect it from overspeed. The space between rotors allows the turbine to be mounted atop an elevating structure wider than a normal tower. Such a wider mount may be a tripod tower, a guyed tower with guy wires attached to the tower at a point higher than the lowest point reached by the blades, or even a building.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: March 7, 2006
    Inventor: Douglas Spriggs Selsam
  • Publication number: 20040219018
    Abstract: A multiplicity of horizontal axis rotors are coaxially attached, at spaced intervals, to an elongate driveshaft. This driveshaft with attached rotors is aimed, not directly into the wind, but at a slightly offset angle, allowing each rotor to encounter a wind stream having fresh wind, substantially undisturbed by the wake of upwind rotors. That offset angle may be in the horizontal plane, and is maintained by passive means such as a tail. In high winds the turbine is allowed to turn across the wind or furl sideways to protect it from overspeed. The space between rotors allows the turbine to be mounted atop an elevating structure wider than a normal tower. Such a wider mount may be a tripod tower, a guyed tower with guy wires attached to the tower at a point higher than the lowest point reached by the blades, or even a building.
    Type: Application
    Filed: February 17, 2004
    Publication date: November 4, 2004
    Inventor: Douglas Spriggs Selsam
  • Patent number: 6730004
    Abstract: A blow-moldable container, having a centrally located, generally tubular handle spanning a central recess has improved balance and ergonomics over existing blow-molded containers. Such a balanced container has great utility as a handheld freeweight, or as a container for pourable substances. An integrally molded base allows our container to be stood upright on end like a regular bottle. Products may be marketed in such containers under the premise that the consumer automatically acquires a freeweight by purchasing the product. The inclusion of fitably engageable contours on its top and bottom surfaces makes such a container stackable with others of its kind, for ease of packaging, shipping, and storage. A graduated set of handheld fillable freeweights may thus be compactly stored without a special rack. Since blow-molding offers great economy of production for sufficiently large numbers of containers, the average person will now be able to afford an entire graduated set of freeweights.
    Type: Grant
    Filed: September 11, 2001
    Date of Patent: May 4, 2004
    Inventor: Douglas Spriggs Selsam
  • Patent number: 6692230
    Abstract: Multiple horizontal axis rotors are coaxially attached, at spaced intervals, to an elongate driveshaft, which is aimed at a slightly offset angle from the wind direction, exposing each rotor to fresh wind. That offset angle may be in the vertical plane, horizontal plane, or oblique. The shaft is held by bearings near its midsection, and drives a load, such as an electrical generator. This assembly is allowed to pivot about the vertical axis of a supporting tower, and may be actively or passively aimed, in response to wind direction and velocity. Multiple driveshafts may be mounted on a single pivoting support frame. Multiple small rotors weigh less for the same swept area than an equivalent larger rotor, are easier to manufacture and transport, and rotate faster, transmitting the same power at less torque, more closely matching the required rpm of a generator, reducing or eliminating the need for ratio gearing.
    Type: Grant
    Filed: November 23, 2001
    Date of Patent: February 17, 2004
    Inventor: Douglas Spriggs Selsam
  • Patent number: 6616402
    Abstract: Multiple horizontal axis type rotors are coaxially attached along the upper section of an elongate torque transmitting tower/driveshaft, The tower/driveshaft projects upward from a cantilevered bearing means, and is bent downwind, until the rotors become sufficiently aligned with the wind to rotate the entire tower/driveshaft, Power is drawn from the shaft at the base. Surface mount, subsurface mount, and marine installations, including a sailboat, are disclosed. Blade-to-blade lashing, and vertical axis rotor blades may also be included. Vertical and horizontal axis type rotor blades may be interconnected along the length of the tower/driveshaft to form a structural lattice, and the central shaft may even be eliminated. Aerodynamic lifting bodies or tails, buoyant lifting bodies, buoyant rotor blades, and methods of influencing the tilt of the rotors, can help elevate the structure. This wind turbine can have as few as one single moving part.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: September 9, 2003
    Inventor: Douglas Spriggs Selsam
  • Publication number: 20020192068
    Abstract: A series of horizontal axis type rotors is distributed along the upper section of an elongate torque transmitting tower/driveshaft. The tower/driveshaft projects upward at its base, supported by a cantilevered bearing means, so it is free to rotate about its own axis. The tower/driveshaft is bent downwind, until the coaxially attached horizontal axis rotors become sufficiently aligned with the wind to rotate the entire tower/driveshaft. Power is drawn from the rotating shaft at the base. Surface mount, subsurface mount, and marine installations are disclosed, including a sailboat that can sail upwind, and store energy while moored. Vertical axis rotor blades may be attached to the lower, substantially vertical section of the tower/driveshaft and even to the distal section of the tower/driveshaft, should it hang in a sufficiently vertical direction for such blades to contribute toward rotation.
    Type: Application
    Filed: June 14, 2001
    Publication date: December 19, 2002
    Inventor: Douglas Spriggs Selsam
  • Publication number: 20020192070
    Abstract: A multiplicity of horizontal axis rotors are coaxially attached, at spaced intervals, to an elongate driveshaft. This driveshaft with attached rotors is aimed, not directly into the wind, but at a slightly offset angle, allowing each rotor to encounter a wind stream having fresh wind, substantially undisturbed by upwind rotors, reducing wind shadow effects from rotor to rotor. That offset angle may be in the vertical plane, horizontal plane, or oblique. The shaft is held with rotational freedom at or near its midsection by a cantilevered bearing means, and drives a load, such as an electrical generator. This cantilevered bearing means, along with the rotor laden driveshaft which it supports, is allowed to pivot, as an entire unit, about the vertical axis of a supporting tower. Certain embodiments comprise an active aiming means, others are configured to have more wind resistance from a downwind section than an upwind section, and so are self-aiming, like a weathervane.
    Type: Application
    Filed: November 23, 2001
    Publication date: December 19, 2002
    Inventor: Douglas Spriggs Selsam
  • Publication number: 20020077225
    Abstract: A stackable bottle is fully penetrated from a first side to an opposing side by an aperture, which is spanned by a handle. The bottle is balanced about this handle, making it easy to lift, carry, pour, or mount atop a water dispenser. Mutually engaging stacking contours, comprising raised and recessed regions, are incorporated into these two sides, so that the bottles may be conveniently stacked one atop the next. The pattern of stacking contours is inversely symmetrical about a longitudinal axis, so one or more bottles of a stack may be turned upside down without affecting stackability. The bottle looks the same whether upside-down or right-side-up; there is no difference between the top and bottom. The pattern of stacking contours is also inversely symmetrical about a latitudinal axis, so that one or more bottles of a stack may be rotated 180 degrees about a vertical axis without affecting stackability.
    Type: Application
    Filed: November 6, 2001
    Publication date: June 20, 2002
    Inventor: Douglas Spriggs Selsam
  • Publication number: 20020010059
    Abstract: A blow-moldable container, having a centrally located, generally tubular handle spanning a central recess has improved balance and ergonomics over existing blow-molded containers. Such a balanced container has great utility as a handheld freeweight, or as a container for pourable substances. An integrally molded base allows our container to be stood upright on end like a regular bottle. Products may be marketed in such containers under the premise that the consumer automatically acquires a freeweight by purchasing the product. The inclusion of fitably engageable contours on its top and bottom surfaces makes such a container stackable with others of its kind, for ease of packaging, shipping, and storage. A graduated set of handheld fillable freeweights may thus be compactly stored without a special rack. Since blow-molding offers great economy of production for sufficiently large numbers of containers, the average person will now be able to afford an entire graduated set of freeweights.
    Type: Application
    Filed: September 11, 2001
    Publication date: January 24, 2002
    Inventor: Douglas Spriggs Selsam
  • Patent number: 6312364
    Abstract: A blow-moldable container, having a centrally located, generally tubular handle spanning a central recess has improved balance and ergonomics over existing blow-molded containers. Such a balanced container has great utility as a handheld freeweight, or as a container for pourable substances. An integrally molded base allows our container to be stood upright on end like a regular bottle. Products may be marketed in such containers under the premise that the consumer automatically acquires a freeweight by purchasing the product. The inclusion of fitably engageable contours on its top and bottom surfaces makes such a container stackable with others of its kind, for ease of packaging, shipping, and storage. A graduated set of handheld fillable freeweights may thus be compactly stored without a special rack. Since blow-molding offers great economy of production for sufficiently large numbers of containers, the average person will now be able to afford an entire graduated set of freeweights.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: November 6, 2001
    Inventor: Douglas Spriggs Selsam
  • Patent number: 5716305
    Abstract: A multiple use exercise device is formed as a closable hollow container which may be filled with a ballast substance, such as water, by the end user. The hollow container is penetrated at each end by a recess. The central portion of each recess is spanned by a handle, giving the device utility as a barbell. A central cutout, shaped to accomodate the trunk of the user, enhances this utility by making the container easier for the user to hold close to the body, and by increasing the range of motion possible at full extension and contraction, during exercises normally performed with a barbell. A flat surface, located on the side of the container opposite the central cutout, serves as a stepping surface for the performance of stair stepping type exercises. A pair of voids, penetrating the container from the central cutout to the flat stepping surface, are shaped to accept the insertion of the user's feet from either the top or the bottom.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: February 10, 1998
    Inventor: Douglas Spriggs Selsam