Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Resilient bias or mount
Reexamination Certificate
2000-03-13
2001-09-04
Ryznic, John E. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Resilient bias or mount
C416S19700C
Reexamination Certificate
active
06283711
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is in the field of aerodynamics and specifically relates to a rotating airfoil that could be used, for example, as a wind motor to generate a torque; or alternatively, it could be driven to serve as a propeller or lift-generating device.
2. The Prior Art
In U.S. Pat. No. 1,697,574 issued Jan. 1, 1929, Savonius describes a rotor that now bears his name. In his own words, “the vane rotor consists of two oppositely arranged hollow shaped vanes of predominantly rectilinear generatrix, the inner edge of each vane catching the segmental space bordered by the other vane, both vanes thus forming an air passage being adapted to force the air current from the hollow side of one of said vanes to the hollow side of the other vane in an S-like passage of substantially constant area.”
Today, to workers in this field, the term “Savonius rotor” suggests a family of structures characterized by two cylindrical-shaped sheets, disposed symmetrically about an axis of rotation, with their concave surfaces facing each other. A number of variations have been tried; typically they involved altering the separation between the vanes or using the centrifugal force resulting from rotation of the rotor to alter the shape of the vanes to automatically limit or control the rotational speed. Such a technique is described in U.S. Pat. No. 1,766,765 issued Jun. 24, 1930 to Savonius.
The present invention is not merely another variation of the dimensions of the rotor. Instead the present invention consists of a new and beneficial vane shape that improves the performance of the rotor.
SUMMARY OF THE INVENTION
In accordance with the present invention, the leading edge of each vane is extended forward at a constant radius from the axis of rotation through an angle not exceeding 90 degrees about the axis of rotation. This simple addition to the basic Savonius rotor results in greater torque and higher rotational speed.
The novel features which are believed to be characteristic of the invention, both as to organization and method of operation, together with further objects and advantages thereof, will be better understood from the following description considered in connection with the accompanying drawings in which a preferred embodiment of the invention is illustrated by way of example. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the invention.
REFERENCES:
patent: 1200308 (1916-10-01), Bunnell
patent: 1646673 (1927-10-01), Wilson
patent: 1697574 (1929-01-01), Savonius
patent: 1766765 (1930-06-01), Savonius
patent: 2007963 (1935-07-01), Cleveland
patent: 3645694 (1972-02-01), Flatau
patent: 3942909 (1976-03-01), Yengst
patent: 4005947 (1977-02-01), Norton et al.
patent: 4177009 (1979-12-01), Baum, Sr. et al.
patent: 4274011 (1981-06-01), Garfinkle
patent: 4292540 (1981-09-01), Thompson et al.
patent: 4718822 (1988-01-01), Riezinstein
patent: 1132053 (1982-09-01), None
patent: 60-145464-A (1985-07-01), None
patent: 62-82280-A (1987-04-01), None
patent: 65940 (1924-12-01), None
Borg John L.
Morisseau Kenneth C.
McKown Daniel C.
Ryznic John E.
LandOfFree
Modified savonius rotor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modified savonius rotor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modified savonius rotor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2528443