US3698098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for drying articles having a low heat tolerance
Assignee: United States Department of the Navy
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Filing: 1971-03-29
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Granted: 1972-10-17
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Expires: 1991-03-29
Abstract
Abstract A method for drying articles having a low heat tolerance, such as parachutes fabricated of synthetic fibers, comprising the steps of first heating a hermetically sealable chamber to a predetermined temperature which the article can tolerate, then evacuating the chamber to create a vacuum therein for substantially reducing the boiling-point of any moisture in the article, and exhausting the boiled-off moisture to complete the drying cycle.
Inventors
- 👤 James M Ramsay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:33
CPC Classifications
D; D06; D06C; D06C7/00; D06C2700/00; D06C2700/09
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
95 words
A method of drying a parachute fabricated of synthetic fibers having a low heat tolerance comprising the steps of: inserting the parachute in a chamber; first heating the chamber to a predetermined temperature between 60* to 140* F. below which the article can tolerate; evacuating said chamber to create a vacuum of between 27 inches Hg to 29.5 inches Hg therein for substantially reducing the boiling-point of any moisture in said article; exhausting the boiled-off vapor from said chamber until the article is dry; relieving the vacuum within the chamber to complete the drying cycle.
Claim 2
Independent Claim
95 words
A method of drying a parachute fabricated of synthetic fibers having a low heat tolerance comprising the steps of: inserting the parachute in a chamber; first heating the chamber to a predetermined temperature between 60* to 140* F. below which the article can tolerate; evacuating said chamber to create a vacuum of between 27 inches Hg to 29.5 inches Hg therein for substantially reducing the boiling-point of any moisture in said article; exhausting the boiled-off vapor from said chamber until the article is dry; relieving the vacuum within the chamber to complete the drying cycle.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein the heating is achieved by external and internal means, the latter by folding the article within a flexible electric blanket positioned within the chamber.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |