US3608898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treadmill with curved axles supporting the belt
Assignee: Individual
•
Filing: 1970-05-19
•
Granted: 1971-09-28
•
Expires: 1990-05-19
Abstract
Abstract A treadmill utilizing an endless belt which permits a user to run while remaining in one place. Curved axles supporting driving wheels are employed to minimize the number of driving wheels and axles employed. Each axle rotatably supports one wheel at its center and one wheel at each end. These axles are curved in a horizontal plane so that the center wheel is offset from the end wheels.
Inventors
- 👤 Evan H Berlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:01
CPC Classifications
A; A63; A63B; A63B22/00; A63B22/02; A63B22/0015; A63B22/0023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
Exercise apparatus comprising: a hollow rectangular frame having open top and bottom surfaces; a plurality of horizontal spaced axles extending in spaced horizontally coplanar positions between opposite sides of the frame, at least some of these axles being curved in a horizontal plane whereby the midpoint of each curved axle is in the same horizontal plane, as but is disposed offset and equidistantly spaced from both ends thereof; a like plurality of pairs of driving wheels, each wheel in the pair being rotatably disposed about a corresponding end of a corresponding axle, all of said wheel pairs being parallel and coplanar; an additional and like plurality of individual driving wheels parallel to and coplanar with said wheel pairs, each individual wheel being rotatable about the midpoint of the corresponding axle; and an endless belt having a longitudinal direction of rotation extending transversely to said axles, said belt being wrapped about and in peripheral contact with all of said wheels and spaced from said axles.
Claim 2
Dependent Claim
164 words
Exercise apparatus comprising: a hollow rectangular frame having open top and bottom surfaces; a plurality of horizontal spaced axles extending in spaced horizontally coplanar positions between opposite sides of the frame, at least some of these axles being curved in a horizontal plane whereby the midpoint of each curved axle is in the same horizontal plane, as but is disposed offset and equidistantly spaced from both ends thereof; a like plurality of pairs of driving wheels, each wheel in the pair being rotatably disposed about a corresponding end of a corresponding axle, all of said wheel pairs being parallel and coplanar; an additional and like plurality of individual driving wheels parallel to and coplanar with said wheel pairs, each individual wheel being rotatable about the midpoint of the corresponding axle; and an endless belt having a longitudinal direction of rotation extending transversely to said axles, said belt being wrapped about and in peripheral contact with all of said wheels and spaced from said axles.
Claim 3
Dependent Claim
16 words
Apparatus as set forth in claim 1 wherein others of said axles are straight and parallel.
Claim 4
Dependent Claim
25 words
Apparatus as set forth in claim 2 wherein there are two straight axles, each straight axle being disposed adjacent a corresponding end of the frame.
Claim 5
Dependent Claim
33 words
Apparatus as set forth in claim 3 further including manually adjustable means secured to one end of said frame to vary the angle of inclination of said frame with respect to the horizontal.
References Cited (Backward Citations)
US1064968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |