Patent US8276628B2 successfully refreshed from Google Patents.
US3764097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight, variable solidity knitted parachute fabric
Assignee: National Aeronautics and Space Administration
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Filing: 1971-12-23
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Granted: 1973-10-09
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Expires: 1991-12-23
Abstract
Abstract A decelerator particularly adapted for high altitude, low atmospheric density operation includes a canopy constructed of a circular knitted fabric including ribbon-like yarns which are twisted to provide air deflection and hence, resultant drag. A radar reflective version of the fabric is preferably knitted of a combination of nylon filaments and metallized polyester tapes or ribbons which, in addition to serving in deflecting air, provide the desired reflectivity.
Inventors
- 👤 F Matthews
- 👤 E White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:36
CPC Classifications
B; B64; B64D; B64D17/00; B64D17/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
15 words
A decelerator as claimed in claim 1 wherein said ribbons are fabricated of polyester film.
Claim 2
Dependent Claim
15 words
A decelerator as claimed in claim 1 wherein said support fabric includes radar reflective material.
Claim 3
Dependent Claim
20 words
A decelerator as claimed in claim 3 wherein said radar reflective material comprises metallic ribbons circular knitted into said fabric.
Claim 4
Dependent Claim
15 words
A decelerator as claimed in claim 4 wherein said metallic ribbons comprise aluminized polyester ribbons.
Claim 5
Dependent Claim
16 words
A decelerator as claimed in claim 5 wherein said fabric further comprises circular diameter nylon monofilaments.
Claim 6
Dependent Claim
38 words
A lightweight, variable solidity, radar reflective knitted parachute fabric comprising a circular knitted fabric knitted from synthetic plastic polymeric filaments and radar reflective ribbons, the flat parts of said ribbons being twisted to provide air deflection in use.
Claim 7
Dependent Claim
27 words
A parachute fabric as claimed in claim 7 wherein said radar reflective elements comprise polyester ribbons having a metallic coating thereon, and said metallic coating is aluminum.
Claim 8
Dependent Claim
16 words
A parachute fabric as claimed in claim 7 wherein said filaments comprise circular diameter nylon monofilaments.
Claim 9
Dependent Claim
37 words
A parachute fabric as claimed in claim 7 wherein the weight per unit area of the fabric is less than 15 grams per square meter and the percentage of light transmission therethrough is greater than 50 percent.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |