US3703284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diagnostic and therapeutic exercise treadmill
Assignee: Del Mar Engineering Laboratories
•
Filing: 1970-12-31
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Granted: 1972-11-21
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Expires: 1990-12-31
Abstract
Abstract An improved exercise treadmill is provided for diagnostic and therapeutic purposes, and which includes a heavy multi-ply nylon belt which is driven along and around a metal plate to define the walking area. The metal plate is composed, for example, of material of high heat conductivity, and it is coated with Teflon. This results in low friction and insures low drag, regardless of the weight of the patient. An advantage of the Teflon coating is that it does not require waxing. The aforesaid plate may be coated on both sides so that it may be reversed for extended use after the Teflon coating on one surface has become worn. Additionally, the metal plate is supported by a layer of resilient sheet material mounted on a platform to give the desired resilience to the plate.
Inventors
- 👤 Joseph A Hesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:11
CPC Classifications
A; A63; A63B; A63B22/00; A63B22/02; A63B22/0235; A63B22/0242; A63B22/025; A63B22/0015; A63B22/0023; A63B22/0285
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
Therapeutic exercise apparatus including: a frame having an elongated rectangular configuration; a pair of rollers mounted at spaced positions on said frame; a metal plate of high heat conductivity supported on said frame between said rollers and extending essentially from one of said rollers to the other of said rollers; a coating of low frictional material disposed on at least one surface of said plate; a flat platform mounted on said frame under said plate and serving as a support for said plate; a layer of resilient sheet material interposed between said platform and said plate; and an endless belt looped around said rollers and extending along the coated surface of said plate.
Claim 2
Dependent Claim
113 words
Therapeutic exercise apparatus including: a frame having an elongated rectangular configuration; a pair of rollers mounted at spaced positions on said frame; a metal plate of high heat conductivity supported on said frame between said rollers and extending essentially from one of said rollers to the other of said rollers; a coating of low frictional material disposed on at least one surface of said plate; a flat platform mounted on said frame under said plate and serving as a support for said plate; a layer of resilient sheet material interposed between said platform and said plate; and an endless belt looped around said rollers and extending along the coated surface of said plate.
Claim 3
Dependent Claim
113 words
Therapeutic exercise apparatus including: a frame having an elongated rectangular configuration; a pair of rollers mounted at spaced positions on said frame; a metal plate of high heat conductivity supported on said frame between said rollers and extending essentially from one of said rollers to the other of said rollers; a coating of low frictional material disposed on at least one surface of said plate; a flat platform mounted on said frame under said plate and serving as a support for said plate; a layer of resilient sheet material interposed between said platform and said plate; and an endless belt looped around said rollers and extending along the coated surface of said plate.
Claim 4
Dependent Claim
113 words
Therapeutic exercise apparatus including: a frame having an elongated rectangular configuration; a pair of rollers mounted at spaced positions on said frame; a metal plate of high heat conductivity supported on said frame between said rollers and extending essentially from one of said rollers to the other of said rollers; a coating of low frictional material disposed on at least one surface of said plate; a flat platform mounted on said frame under said plate and serving as a support for said plate; a layer of resilient sheet material interposed between said platform and said plate; and an endless belt looped around said rollers and extending along the coated surface of said plate.
Claim 5
Dependent Claim
25 words
The apparatus defined in claim 1, in which said layer of resilient sheet material is composed of felt, and said platform is composed of wood.
Claim 6
Dependent Claim
15 words
The apparatus defined in claim 2, in which said plate is composed of aluminum alloy.
Claim 7
Dependent Claim
18 words
The apparatus defined in claim 1, in which said coating of low frictional material is composed of Teflon.
Claim 8
Dependent Claim
30 words
The apparatus defined in claim 1, in which said endless belt is composed of a multi-ply nylon fabric and which includes a rubber friction coating on the outer surface thereof.
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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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |