US4848737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cardiovascular exercise ladder
Assignee: TRECO PRODUCTS INCORPORATED 11846 TUGBOAT LANE NEWPORT NEWS VIRGINIA 23606
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Filing: 1987-10-01
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Granted: 1989-07-18
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Expires: 2007-10-01
Abstract
Abstract The invention is a moving ladder exercise device 10 comprising a base 11, moving ladder assembly 12 and retarder assembly 14 using a microprocessor 15 to control retarder speed. The operation of the moving ladder requires the operator to climb the ladder thereby driving the ladder with his body weight. Maximum speed of the ladder assembly 12 cannot exceed the speed of the retarder assembly 14 due to the unidirectional clutch 33 and worm-drive assembly 32. Sensors 17 monitor heart rate of the operator and sensor 16 monitors ladder speed. Sensor output to microprocessor 15 provides feedback which allows the microprocessor to adjust retarder assembly speed so that the desired heart rate is reached and maintained.
Inventors
- 👤 Ted. R. Ehrenfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:38
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/15; A63B21/157; A63B22/00; A63B22/0002; A63B22/001; A63B22/0015; A63B22/0023; A63B23/00; A63B23/035; A63B23/03575; A63B21/005; A63B21/0058; A63B22/04; A63B2220/00; A63B2220/30; A63B2220/34; A63B2230/00; A63B2230/04; A63B2230/06; A63B2230/062; Y; Y10; Y10S; Y10S482/00; Y10S482/90; Y10S482/901; Y10S482/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A moving cardiovascular exercise ladder capable of distributing workload between upper body and lower body muscle groups and comprising in combination: a base support platform; a low-friction, moving ladder assembly having a closed-loop transmission, said assembly mounted on said base support platform, and being freerunning, independent of any frictional, hydraulic, or electrical drag devices, below a selectable limiting speed; a moving retarder means comprising an electric motor, worm gear drive mechanism, and unidirectional clutch, said retarder means functioning so that said clutch engages and connects the retarder means to the moving ladder assembly thereby limiting the ladder speed to a selected value, said ladder assembly incorporating a pivotal mount attached to said base support platform such that adjustments may be made in the inclination angle of the ladder; a microprocessor attached to the fixed structure of said moving ladder assembly; a ladder speed sensor functionally connected to said microprocessor; and a heart rate sensor for monitoring the heart rate of the operator functionally connected to said microprocessor.
Claim 2
Dependent Claim
167 words
A moving cardiovascular exercise ladder capable of distributing workload between upper body and lower body muscle groups and comprising in combination: a base support platform; a low-friction, moving ladder assembly having a closed-loop transmission, said assembly mounted on said base support platform, and being freerunning, independent of any frictional, hydraulic, or electrical drag devices, below a selectable limiting speed; a moving retarder means comprising an electric motor, worm gear drive mechanism, and unidirectional clutch, said retarder means functioning so that said clutch engages and connects the retarder means to the moving ladder assembly thereby limiting the ladder speed to a selected value, said ladder assembly incorporating a pivotal mount attached to said base support platform such that adjustments may be made in the inclination angle of the ladder; a microprocessor attached to the fixed structure of said moving ladder assembly; a ladder speed sensor functionally connected to said microprocessor; and a heart rate sensor for monitoring the heart rate of the operator functionally connected to said microprocessor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |