Patent US3901221A successfully refreshed from Google Patents.
US3901221A
Expired / Lapsed
US
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Pressure cycle for stimulating blood circulation in the limbs
Assignee: CLINICAL Tech INTERNATIONAL Inc
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Filing: 1974-04-08
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Granted: 1975-08-26
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Expires: 1994-04-08
Abstract
Abstract A method of cycling pressure applied externally to a mammalian limb to obtain high amplitude surges of blood. A fast rise time followed by a holding period and a relatively long relaxation interval is utilized.
Inventors
- 👤 James E Nicholson
- 👤 Charles S Lipson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:46
CPC Classifications
A; A61; A61H; A61H9/00; A61H9/005; A61H9/0078
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A method of overcoming circulatory stasis in mammalian limbs comprising: a. Applying to a limb portion fluid pressure of at least 30 mm of mercury over a time interval of between 9 and 15 seconds with a rise time reaching 30 mm of mercury within 3 seconds; b. keeping the applied pressure below 1 mm of mercury over a time interval of 30 to 60 seconds; and c. cyclically repeating the above steps.
Claim 2
Independent Claim
73 words
A method of overcoming circulatory stasis in mammalian limbs comprising: a. Applying to a limb portion fluid pressure of at least 30 mm of mercury over a time interval of between 9 and 15 seconds with a rise time reaching 30 mm of mercury within 3 seconds; b. keeping the applied pressure below 1 mm of mercury over a time interval of 30 to 60 seconds; and c. cyclically repeating the above steps.
Claim 3
Dependent Claim
25 words
A method according to claim 1 wherein said pressure is applied for substantially 12 seconds and removed for substantially 48 seconds in repeating cyclical fashion.
Claim 4
Dependent Claim
40 words
A method according to claim 1 wherein said fluid pressure is in the range of 40 to 50 mm of mercury and has an inflation rate reaching at least 10 mm of mercury per second for at least 3 seconds.
Claim 5
Dependent Claim
12 words
A method according to claim 3 wherein said fluid is a gas.
Claim 6
Dependent Claim
22 words
A method according to claim 4 in which said fluid is applied by means of a plastic garment enclosing a limb extremity.
Claim 7
Dependent Claim
55 words
A method according to claim 4 wherein at the end of the said time interval over which the fluid pressure in the range of 40 to 50 mm of mercury is applied, the pressure is released falling to 10 mm of mercury in about 2 seconds and then more slowly to 0 mm of mercury.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |