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US 5,131,805 AGranted
Dual axis fluid current motor
OwnerLester A. Stevensoninventor
Life of this patent
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Abstract
Apparatus and method for harnessing fluid energy from a fluid current and converting it into mechanical energy. The invention comprises a big wheel and a little wheel where the little wheel rotates about on axis parallel to but offset from an axis about which the big wheel rotates. The little wheel rotates within the big wheel. Flexible sails are fastened between masts of the big wheel and masts of the little wheel so that when the wheels rotate each sail is unfurled and extended during one phase of operation and said sail is folded upon itself during another phase of operation. When extended or stretched open, the sail derives power from the fluid current. When the sail is folded, it offers a reduced resistance to the fluid current into which said sail is moving.
Claims15
The method of converting fluid energy into mechanical energy in a process that includes the following steps:
- a. constructing a fluid current motor having a big wheel and a little wheel so that the little wheel rotates about a minor axis and the big wheel rotates about a major axis,
- b. locating the minor axis away from and parallel to the major axis at a perpendicular distance less than the difference between a radius of the big wheel and a radius of the little wheel,
- c. positioning the little wheel within the big wheel so that a circumference of a little circle defined by the rotating little wheel approaches a circumference of a big circle defined by the rotating big wheel in one phase of operation and departs in another phase,
- d. attaching at least two sails between the big wheel and the little wheel so that the sails are repetitively opened and closed;
- and
- orienting the motor so that an offset line that is perpendicular to and intersecting the major axis and minor axis creates about a forty-five degree angle with a fluid current directional line that traces a direction from which fluid current is coming and intersects said major axis.
3 more elements
The process defined in 1 further comprising:
- f. opening each sail during a power phase of operation when the circumferences of the circles are distanced, and
- g. closing each sail during a return phase of operation when the circumferences are nearer to each other.
The process defined in 1 further comprising:
- f. harnessing the force of the current for a power stroke in the open sail by
- g. presenting a greater surface area of the sail in opposition to the current,
- h. allowing the sail to be pushed by the current in said sail's open configuration,
- j. transferring the force derived from the current by the sail to the wheels thereby
- k. causing the wheels to rotate about the axes,
- l. bringing the open sail around on the wheels so that the sail folds upon itself as the wheels become closer together thereby
- m. causing the sail to be less resistant to the current in the folded configuration than in the open configuration, and
- n. moving the sail into the current so it is readied for another power stroke.
5 more elements
The process defined in 1 further comprising:
- f. diverting the current during a portion of the power stroke when the sail is moving into the current and thereby
- g. deriving power from the current.
The process defined in 1 further comprising:
- f. folding the sail over itself and about the masts during a portion of the return phase so that said sail assumes a chambered shape and continues to derive power from the current.
The process defined in 1 further comprising:
- f. wrapping parallel edges of each sail around one big mast and one little mast so that said sail spans the distance between said masts,
- g. spreading a split sail fastener so that an opening along said split is of sufficient width to allow the fastener to be placed about the mast with the portion of the sail wrapped about the mast between said mast and said fastener, and
- h. allowing the fastener to return to its original configuration so that the sail is secured between the fastener and the mast thereby
- j. fixing the sail to the mast.
1 more element
A fluid current motor comprising:
- a. a base,
- b. a major axis parallel to a long axis of the base,
- c. a minor axis parallel to the major axis and offset a distance from said major axis,
- d. a big wheel rotatable about the major axis.
- e. the big wheel having at least two big spokes extending radially from the major axis so that distal ends of said spokes trace a big circle when said big wheel rotates,
- f. the big circle having a radius and a circumference and said circumference being centered about the major axis,
- g. a little wheel rotatable about the minor axis,
- h. the little wheel having at least two little spokes extending radially from the minor axis so that distal ends of said little spokes trace a little circle when said little wheel rotates,
- j. the little circle having a radius and a circumference and said circumference being centered about the minor axis,
- k. the little wheel is positioned within a cylinder defined by a rotated big wheel,
- l. at least two sails connected between the big wheel and the little wheel,
- m. a crank rotatably connected to the base,
- n. the crank being bent so that a long axis of a mid-section of said crank is coincident with the minor axis and the major axis is coincident with a long axis of a top end of said crank and a long axis of a bottom end of said crank,
- o. the radius of the little circle being less than the radius of the big circle, and
- p. a perpendicular distance between the minor axis and the major axis is less than the difference between lengths of the radius of the big circle and the radius of the little circle.
12 more elements
A fluid current motor comprising:
- a. a base,
- b. a major axis parallel to a long axis of the base,
- c. a minor axis parallel to the major axis and offset a distance from said major axis,
- d. a big wheel rotatable about the major axis,
- e. the big wheel having at least two big spokes extending radially from the major axis so that distal ends of said spokes trace a big circle when said big wheel rotates,
- f. the big circle having a radius and a circumference and said circumference being centered about the major axis,
- g. a little wheel rotatable about the minor axis,
- h. the little wheel having at least two little spokes extending radially from the minor axis so that distal ends of said little spokes trace a little circle when said little wheel rotates,
- j. the little circle having a radius and a circumference and said circumference being centered about the minor axis,
- k. the little wheel is positioned within a cylinder defined by a rotated big wheel,
- l. at least two sails connected between the big wheel and the little wheel;
- m. the big wheel having:
- i. a big top hub
- ii. at least two big masts and
- iii. a big bottom hub,
- n. the big top hub concentric about the major axis and rotatably connected about a top end of a crank,
- o. each of at least one big upper spoke extending radially from the big top hub and all of said spokes are equiangularly spaced about said hub,
- p. the big bottom hub concentric about the major axis and rotatably connected about a bottom end of the crank,
- q. each of at least one big lower spoke extending radially from the big bottom hub and all of said spokes are equiangularly spaced about said hub,
- r. each big mast oriented so that a long axis of said big mast is parallel to the major axis and intersects the circumference of the big circle,
- s. the little wheel having:
- i. a little top hub
- ii. at least two little masts and
- iii. a little bottom hub,
- t. the little top hub concentric about the minor axis and rotatably connected to a top end of a mid-section of the crank,
- u. each of at least one little upper spoke extending radially from the little top hub and all of said spokes are equiangularly spaced about said hub,
- v. the little bottom hub concentric about the minor axis and rotatably connected to a bottom end of the mid-section,
- w. each of at least one little lower spoke extending radially from the little bottom hub and all of said spokes are equiangularly spaced about said hub,
- x. each little mast oriented so that a long axis of said mast is parallel to the minor axis and intersects the circumference of the little circle, and
- y. an angular distance between adjacent big spokes on a hub is equal to an angular distance between adjacent little spokes on a hub.
27 more elements
Dependencies are inferred from the claim text.