ELLIPTICAL EXERCISE DEVICE
An elliptical exercise device has guide links pivotally attached to a frame and foot support links pivotally attached to the guide links. Horizontal control links couple the guide links to a crank system and vertical control links couple the foot support links to the crank system such that rotation of the crank system moves foot receiving areas in a generally elliptical path.
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This application claims priority of U.S. Provisional Application 62/000,671 filed May 20, 2014, the contents of which are incorporated herein by reference.
FIELD OF THE INVENTIONThis invention relates generally to elliptical exercise devices in which the path of travel of a user's foot is generally elliptical.
BACKGROUND OF THE INVENTIONThere are a number of exercise devices that operate to allow a user to implement a foot action following a generally closed, curved path of travel, simulating running and/or walking. These devices are generally referred to as “elliptical” exercise devices. Many such elliptical exercise devices are large, complicated, costly, and/or have undesirable characteristics related to the motion of the user's feet.
SUMMARY OF THE INVENTIONThe present invention offers embodiments of an elliptical exercise device. Some embodiments offer reduced mechanical complexity and a path of motion with desirable characteristics.
A first embodiment of an elliptical exercise device includes a frame configured to be supported on a horizontal surface. The frame has a first pivot axis and a second pivot axis defined thereon. The second pivot axis is forward of the first pivot axis. A first and second guide link each have a first and a second attachment point defined thereon. Each guide link is pivotally attached, through its first attachment point, to the frame at the first pivot axis thereof. A first and a second foot support link each have a rear portion, a mid portion, and a forward portion. The rear portion of each support link defines a foot receiving area configured to support a user's foot thereon. The mid portion of each foot support link is pivotally connected to the second attachment point of a respective one of the guide links so that when the guide links reciprocate relative to the frame, they cause their respective foot support link to move in a path of travel having a horizontal component of motion. A crank system is pivotally attached to the frame at the second pivot axis thereof. The crank system is rotatable about the second pivot axis. A first and a second horizontal control link each have a first end coupled to a respective one of the guide links and a second end coupled to the crank system such that rotation of the crank system about the second pivot axis causes the respective first and second guide links to pivot about the first pivot axis such that the foot support links move in the path of travel having a horizontal component of motion. A first and a second vertical control link each have a first end coupled to the forward portion of a respective one of the foot support links and a second end coupled to the crank system such that rotation of the crank system about the second pivot axis pivots the foot support links with respect to the guide links and the foot receiving areas move in a path of travel having a vertical component of motion. The foot receiving area of each foot support link moves in a generally elliptical path when the crank system rotates about the second pivot axis.
In certain embodiments, each of the vertical control links is generally parallel with a respective one of guide links. In some embodiments, each of the guide links has a working length defined as a distance from the first attachment point to the second attachment point and each vertical control link has a length that is in the range of 0.8 to 1.2 times the working length of the guide links.
In certain embodiments, the foot support links are supported for movement only by the respective guide link and vertical control link. In some embodiments, each vertical control link and its respective guide link extend generally vertically when the respective foot support link is midway through the horizontal component of its path of travel.
In some versions, the vertical control links are rigid links and the first end of each vertical control link is coupled to the respective one of the foot support links by being pivotally connected directly to the respective one of the foot support links. The second end of each vertical control link is coupled to the crank system by being pivotally connected directly to a crank arm of the crank system.
In some versions, the horizontal control links are rigid links and a first end of each horizontal control link is coupled to the respective one of the guide links by being pivotally connected directly to the respective one of the guide links. The second end of each horizontal control link is coupled to the crank system by being pivotally connected directly to a crank arm of the crank system.
In certain embodiments, the crank system has a first and a second crank arm. The second end of the first horizontal control link and the second end of the first vertical control link are each pivotally connected to the first crank arm. The second end of the second horizontal control link and the second end of the second vertical control link are each pivotally connected to the second crank arm. In some versions, the pivotal connection between each horizontal control link and the respective crank arm is rotationally offset from the pivotal connection between the respective vertical control link and the respective crank arm. The horizontal control links may be outboard of the vertical control links.
In some versions, the first pivot axis is higher than the second pivot axis.
In certain embodiments, each guide link has a connection portion extending forwardly from a remainder of the guide link and the horizontal control links are coupled to the connection portion of the respective guide link. The coupling between each horizontal control link and the respective connection portion may be adjustable so as to adjust a length of the horizontal component of motion of the respective foot support link.
In certain embodiments, the coupling between the vertical control link and the respective foot support link is adjustable so as to adjust a height of the vertical component of motion of the respective foot receiving area.
In some embodiments, a length of the horizontal component of motion of the foot support links and the height of the vertical component of motion of the foot receiving areas are adjustable. The adjustment may be a power adjustment and the horizontal and vertical components may be adjustable in a coordinated manner.
In some embodiments, the foot support links are generally horizontal when the respective foot receiving area is midway through its vertical path of travel. In an alternative embodiment, the exercise device further includes a first and a second resilient member, with each resilient member extending between a respective one of the foot support links and the frame.
Each guide link may further include a hand grip portion extending upwardly from the first attachment point.
The present invention will be explained with reference to some particular embodiments, and it is to be understood that yet other embodiments, modifications, and variations thereof will be apparent to those of skill in the art in view of the teaching presented herein. As will be clear to those of skill in the art, an elliptical exercise device is designed to be used by a user placing each of their feet on a respective foot receiving area and then moving their feet along a closed elliptical path. As such, an elliptical exercise device includes left and right elements for supporting the respective left and right feet of the user. The right and left components of the exercise device are typically substantially the same, though the machine may be constructed such that the two foot receiving areas are 180 degrees out of phase. That is, when one foot receiving area is moving forwardly, the other foot receiving area is moving rearwardly. The present invention will be described primarily with reference to only one set of the components, with it being understood that the corresponding components of the other half of the device are constructed similarly. It should also be understood that the term “elliptical” is not limited to its precise mathematical definition, but is instead used in a more general sense to refer to a closed path of travel with curved portions. Some such elliptical paths of motion will have a longer horizontal component than vertical component.
A pair of guide links are pivotally interconnected with the frame so as to be pivotable about the first pivot axis 18. A first guide link 20 is shown at the midpoint of its travel, wherein it is generally vertical. At this position, the second guide link is also generally vertical and disposed directly behind the first guide link 20, and is therefore not visible in
The guide link 20 may be said to have a first attachment point 22 towards its upper end and a second attachment point 24 at its lower end. The guide link 20 is pivotally interconnected with the first pivot axis 18 of the frame 12 at its first attachment point 22. In the illustrated embodiment, the guide link 20 further includes a hand grip portion 26 extending upwardly from the first attachment point 22.
The exercise device 10 further includes a first foot support link 28 and a second foot support link 29. Each foot support link 28 and 29 is pivotally interconnected with the respective first and second guide link 20 and 21. The foot support link 28 may be said to have a forward portion 30 at its forward end, a rear portion 32 at its rearward end, and a mid portion 34 extending between the forward portion and rear portion. As shown, the mid portion 34 of the foot support link 28 is pivotally interconnected with the lower end of the guide link 20, at the second attachment point 24 of the guide link 20. The rear portion 32 of the foot support link 28 defines a foot receiving area that is configured to support a user's foot thereon. It should be noted that references to forward and rear are made with respect to a direction a user is facing when using the device 10. A user places their feet on the foot receiving areas of the foot support links and faces towards the hand grip portions 26. As such, “forward” is to the left in
A crank system 36 is pivotally interconnected with the frame 12 such that the crank system 36 rotates about the second pivot axis 38 defined on the frame. In the illustrated embodiment, the second pivot axis 38 is forward of the first pivot axis 18 on the upper portion 14 of the frame 12. This means that the second pivot axis 38 is also on the forward portion of the frame. In the illustrated embodiment, the second pivot axis is a short distance lower than the first pivot axis 18.
As will be described, the guide links and foot support links are coupled to the crank system such that rotation of the crank system causes the foot receiving areas 32 to move in a closed generally elliptical path.
Referring again to
A first vertical control link 70 has a first end 72 pivotally connected to the forward portion 30 of the foot support link 28. The vertical control link 70 has a second end 74 that is pivotally coupled to the crank system 36. This connection is not easily seen in the figures due to the shape of the crank arm 40. The second end 74 is pivotally connected to the inner journal 48 of the crank arm 40. As shown in
As the crank system 36 rotates about the second pivot axis 38, the vertical control link 70 is moved upwardly and downwardly thereby causing the respective foot support link 28 to pivot about the second attachment point 24 on the guide link 20, thereby causing the foot receiving area 32 of the foot support link 28 to move in a path of travel having a vertical component of motion. As shown, the forward portion 30 of the foot support link 28 may have multiple attachment points for connection to the vertical control link 70. By changing the attachment point, the height of the vertical path of travel of the foot receiving area 32 may be altered. The vertical control link 70 may be a rigid link with its ends being directly pivotally connected to the foot support link 28 and crank arm 40, respectively. As will be clear to those of skill in the art, the arrangement of the horizontal control links and the vertical control links causes the foot receiving areas of the foot support links to move in a generally elliptical path of travel as the crank system 36 rotates about the second pivot axis 38.
Referring now to
As will be clear to those of skill in the art, the embodiments of
While the horizontal and vertical control links are shown as being directly pivotally connected to the crank arms and to the respective guide links and foot support links, alternative embodiments of the present invention may utilize indirect connections, such as bell cranks or other indirect couplings at one or both ends. However, the direct pivotal connections are preferred for some embodiments.
The foregoing describes some particular embodiments of the present invention. Other embodiments, modifications, and variations thereof will be apparent to those of skill in the art in view of the teaching presented herein. The foregoing is not meant to be a limitation upon the practice of the present invention. For example, any feature of any of the embodiments disclosed herein may be used with any other feature or embodiment disclosed herein. It is the following claims, including all equivalents, which define the scope of the invention.
Claims
1. An elliptical exercise device comprising:
- a frame configured to be supported on a horizontal surface, the frame having a first pivot axis and a second pivot axis defined thereon, the second pivot axis being forward of the first pivot axis;
- a first and a second guide link each having a first and a second attachment point defined thereon, each guide link being pivotally attached, through its first attachment point, to the frame at the first pivot axis thereof;
- a first and a second foot support link each having a rear portion, a mid portion and a forward portion, the rear portion of each support link defining a foot receiving area configured to support a user's foot thereupon, the mid portion of each foot support link being pivotally connected to the second attachment point of a respective one of the guide links so that when the guide links reciprocate relative to the frame, they each cause their respective foot support link to move in a path of travel having a horizontal component of motion;
- a crank system pivotally attached to the frame at the second pivot axis thereof, the crank system being rotatable about the second pivot axis;
- a first and a second horizontal control link each having a first end coupled to a respective one of the guide links and a second end coupled to the crank system such that rotation of the crank system about the second pivot axis causes the respective first and second guide links to pivot about the first pivot axis such that the foot support links move in the path of travel having a horizontal component of motion;
- a first and a second vertical control link each having a first end coupled to the forward portion of a respective one of the foot support links and a second end coupled to the crank system such that rotation of the crank system about the second pivot axis pivots the foot support links with respect to the guide links and the foot receiving areas move in a path of travel having a vertical component of motion,
- whereby a foot receiving area of each foot support link moves in a generally elliptical path when the crank system rotates about the second pivot axis.
2. An elliptical exercise device in accordance with claim 1, wherein each of the vertical control links is generally parallel with the respective one of the guide links.
3. An elliptical exercise device in accordance with claim 2, wherein:
- the guide links have a working length defined as a distance from the first attachment point to the second attachment point; and
- the vertical control links have a length that is in the range of 0.8 to 1.2 times the working length of the guide links.
4. An elliptical exercise device in accordance with claim 1, wherein the foot support links are supported for movement only by the respective guide link and vertical control link.
5. An elliptical exercise device in accordance with claim 1, wherein each vertical control link and its respective guide link extends generally vertically when the respective foot support link is midway through the horizontal component of its path of travel.
6. An elliptical exercise device in accordance with claim 1, wherein:
- the vertical control links are rigid links;
- the first end of each vertical control link is coupled to the respective one of the foot support links by being pivotally connected directly to the respective one of the foot support links; and
- the second end of each vertical control link is coupled to the crank system by being pivotally connected directly to a crank arm of the crank system.
7. An elliptical exercise device in accordance with claim 1, wherein:
- the horizontal control links are rigid links;
- the first end of each horizontal control link is coupled to the respective one of the guide links by being pivotally connected directly to the respective one of the guide links; and
- the second end of each horizontal control link is coupled to the crank system by being pivotally connected directly to a crank arm of the crank system.
8. An elliptical exercise device in accordance with claim 1, wherein:
- the crank system has a first and a second crank arm;
- the second end of the first horizontal control link and the second end of the first vertical control link each being pivotally connected with the first crank arm; and
- the second end of the second horizontal control link and the second end of the second vertical control link each being pivotally connected to the second crank arm.
9. An elliptical exercise device in accordance with claim 8, wherein the pivotal connection between each horizontal control link and the respective crank arm is rotationally offset from the pivotal connection between the respective vertical control link and the respective crank arm.
10. An elliptical exercise device in accordance with claim 9, wherein the horizontal control links are outboard of the vertical control links.
11. An elliptical exercise device in accordance with claim 1, wherein the first pivot axis is higher than the second pivot axis.
12. An elliptical exercise device in accordance with claim 1, wherein each guide link has a connection portion extending forwardly from a remainder of the guide link, the horizontal control links each being coupled to the connection portion of the respective guide link.
13. An elliptical exercise device in accordance with claim 12, wherein the coupling between each horizontal control link and the respective connection portion is adjustable so as to adjust a length of the horizontal component of motion of the respective foot support link.
14. An elliptical exercise device in accordance with claim 1, wherein the coupling between each vertical control link and the respective foot support link is adjustable so as to adjust a height of the vertical component of motion of the respective foot receiving area.
15. An elliptical exercise device in accordance with claim 1, wherein a length of the horizontal component of motion of the foot support links and a height of the vertical component of motion of the foot receiving areas are adjustable.
16. An elliptical exercise device in accordance with claim 15, wherein the adjustable horizontal and vertical components of motion are power adjustable, the horizontal and vertical components being adjustable in a coordinated manner.
17. An elliptical exercise device in accordance with claim 1, wherein the foot support links are generally horizontal when the respective foot receiving area is midway through its vertical path of travel.
18. An elliptical exercise device in accordance with claim 1, further comprising a first and a second resilient member, each resilient member extending between a respective one of the foot support links and the frame.
19. An elliptical exercise device in accordance with claim 1, wherein each guide link further includes a hand grip portion extending upwardly from the first attachment point.
20. An elliptical exercise device in accordance with claim 1, wherein the crank system has a first and a second crank arm, each of the crank arms having two attachment points defined thereon.
Type: Application
Filed: Sep 3, 2014
Publication Date: Nov 26, 2015
Applicant: Larry D. Miller Trust (Rochester, MI)
Inventor: Larry D. Miller (Rochester, MI)
Application Number: 14/476,083