IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0925892
(2010-11-01)
|
등록번호 |
US-8343016
(2013-01-01)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
28 인용 특허 :
7 |
초록
▼
A motor-less leg-powered curved treadmill produced that allows people to walk, jog, run, and sprint without making any adjustments to the treadmill other than shifting the user's center of gravity forward and backwards. A closed loop treadmill belt is formed with a low friction running surface of tr
A motor-less leg-powered curved treadmill produced that allows people to walk, jog, run, and sprint without making any adjustments to the treadmill other than shifting the user's center of gravity forward and backwards. A closed loop treadmill belt is formed with a low friction running surface of transverse wooden, plastic or rubber slats attached to each other in a resilient fashion. Since an essential feature of treadmill is the concave shape of the running surface of belt in its respective upper portion, curved and linear arrays of bearings are used to insure that this shape is maintained during actual use. These bearings prevent the lower portion of the treadmill belt from drooping down (i.e.—it must be held taut), to prevent the top portion to be pulled taut into a flat shape between the front and rear pulley rollers.
대표청구항
▼
1. A motor-less, leg-powered curved treadmill comprising: a treadmill frame;a set of respective front and rear pulley end rollers for rotation, said front and rear pulleys supporting a closed loop treadmill belt;said closed loop treadmill belt comprising a plurality of parallel slats oriented perpen
1. A motor-less, leg-powered curved treadmill comprising: a treadmill frame;a set of respective front and rear pulley end rollers for rotation, said front and rear pulleys supporting a closed loop treadmill belt;said closed loop treadmill belt comprising a plurality of parallel slats oriented perpendicular to an axis of rotation of said belt, said parallel slats attached to each other in a resilient fashion;said closed loop treadmill belt being of such a length as compared to the distance between the end rollers to permit it to assume a required concave upper contour;a means for slackening an upper concave portion while simultaneously keeping a lower portion of the belt taut, preventing said lower portion from drooping down during rotation and exertion of walking or running force upon said upper concave portion of said closed loop treadmill belt;wherein each said slat is made of a material with sufficient resiliency and strength and weight to lie on and conform to a concave row of upper support peripheral ball bearings located at each peripheral side of said upper portion of said motor-less, leg-powered curved treadmill. 2. The motor-less, leg-powered curved treadmill as in claim 1 wherein respective side covers enclose an underlying chassis. 3. The motor-less, leg-powered curved treadmill as in claim 2 wherein said chassis includes at least one robust cross beam attaching respective outer frames and respective inner frames on each side to each other, thereby providing a rectangular chassis. 4. The motor-less, leg-powered curved treadmill as in claim 1 wherein said motor-less, leg-powered curved treadmill is provided without a handle bar assembly. 5. The motor-less, leg-powered curved treadmill as in claim 1 wherein said motor-less, leg-powered curved treadmill is provided with a removable handle bar assembly, which when installed on said motor-less, leg-powered curved treadmill, said handle bar assembly help users who are balance-challenged to use said motor-less, leg-powered curved treadmill. 6. The motor-less, leg-powered curved treadmill as in claim 1 wherein each said slat includes at least one fin descending downward from each said slat. 7. The motor-less, leg-powered curved treadmill as in claim 6 wherein each said slat includes a plurality of fins descending downward from each said transverse slat. 8. The motor-less, leg-powered curved treadmill as in claim 6 wherein each said rows of peripheral bearings are spaced apart from each other on respective left and right sides of said curved treadmill, wherein further said fins of said slats extend cantilevered downward into a vacant mid-section of said treadmill from each said slat so that said slats are resilient to dip slightly under the weight of a user runner without any lower support below non-peripheral mid-sections of said slats. 9. The motor-less, leg-powered curved treadmill as in claim 1 wherein said transverse slats are made of a material selected from the group consisting of rubber, plastic and wood. 10. The motor-less, leg-powered curved treadmill as in claim 1 wherein respective adjusters are provided on at least one set of said pulleys to adjust the distance separating said pairs of front and rear pulleys to insure precise smooth movement of said belt over said pairs of front and rear pulleys. 11. The motor-less, leg-powered curved treadmill as in claim 1 further comprising level adjusters extending down from said frame to adjust the tilt of said motor-less, leg-powered curved treadmill. 12. The motor-less, leg-powered curved treadmill as in claim 1 wherein said means for slackening the upper portion while simultaneously keeping the lower portion taut, preventing said lower portion from drooping down during rotation and exertion of walking or running force upon said upper concave portion of said closed loop treadmill belt comprises at least a pair of linear arrays of bearings extending along and located at opposite peripheral edges of said treadmill frame, each said array of peripheral edge bearings physically supporting said lower portion of said closed loop treadmill belt in a taut non-drooping configuration. 13. The motor-less, leg-powered curved treadmill as in claim 12 wherein said linear array of lower peripheral bearings supporting said lower taut portion of said curved treadmill belt are each attached to respective right and left side frame members of said chassis to prevent drooping of said lower portion of said curved treadmill belt. 14. The motor-less, leg-powered curved treadmill as in claim 1 wherein said closed loop treadmill belt having an extension wing including a v-belt portion, said slats of said closed loop treadmill belt joined to said closed loop treadmill belt having said v-belt portion, said v-belt portion insertable and riding within a corresponding v-shaped groove within each of said front and rear pulleys. 15. The motor-less, leg-powered curved treadmill as in claim 14 wherein each said v-belt portion of said curved treadmill belt includes a short outer extension and a longer inner extension on each side of a v-shaped portion of said v-belt portion, wherein further one or more bolts fasten said longer inner flat belt extension to a respective end of each said slat, wherein said v-shaped portion of said v-belt portion is positioned within said respective v-shaped groove of each said pulley, wherein further a respective ball bearing of said concave peripheral row of ball bearings support a respective edge of said curved treadmill belt. 16. The motor-less, leg powered curved treadmill as in claim 15 further comprising a plurality of centrally located v-belt idler pulleys keeping said extensions of said curved treadmill belt from moving laterally from said pulleys. 17. The motor-less, leg-powered curved treadmill as in claim 16 wherein the respective weight of said curved treadmill belt keeps respective peripheral edges of said treadmill belt in contact with the respective concave contours of said peripheral ball bearings at any speed from stopped to full running speed.
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