US3837604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for controlling the deployment and the development of a parachute canopy
Assignee: United States Department of the Navy
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Filing: 1972-10-06
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Granted: 1974-09-24
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Expires: 1992-10-06
Abstract
Abstract A simple technique is proposed for achieving near-optimum parachute canopy deployment without the need for additional equipment by bundling together the suspension lines and forming therein a series of gradually releasable daisy-chain slip knots. The daisy-chained suspension lines are connected to the canopy skirt by means of a releasable locking device which enables the suspension lines gradually to unravel in a taut condition until the skirt is released by the locking device enabling the dragproducing surface fully to inflate.
Inventors
- 👤 J Matsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:53
CPC Classifications
B; B64; B64D; B64D17/00; B64D17/22; B64D17/34
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
138 words
A parachute canopy comprising: a drag-producing surface having a skirt portion; a load attaching device; a plurality of suspension lines connecting the skirt to the load attaching device; said suspension lines being bundled together and daisy-chained in a series of releasable slip knots extending for a major portion of their length from the skirt end to the load attaching end to form a compact package; a releasable flexible looped line restraining device connecting the bundled suspension lines immediately adjacent the skirt and temporarily restricting the mouth of the canopy skirt; whereby upon parachute deployment the bundled suspension lines commence gradually to unravel in an orderly sequential manner commencing from the load attaching device upwardly to the canopy skirt maintaining the suspEnsion lines under constant tension, and ultimately releasing the restraining device to enable the drag surface to inflate
Claim 2
Dependent Claim
138 words
A parachute canopy comprising: a drag-producing surface having a skirt portion; a load attaching device; a plurality of suspension lines connecting the skirt to the load attaching device; said suspension lines being bundled together and daisy-chained in a series of releasable slip knots extending for a major portion of their length from the skirt end to the load attaching end to form a compact package; a releasable flexible looped line restraining device connecting the bundled suspension lines immediately adjacent the skirt and temporarily restricting the mouth of the canopy skirt; whereby upon parachute deployment the bundled suspension lines commence gradually to unravel in an orderly sequential manner commencing from the load attaching device upwardly to the canopy skirt maintaining the suspEnsion lines under constant tension, and ultimately releasing the restraining device to enable the drag surface to inflate
Claim 3
Dependent Claim
21 words
The parachute canopy of claim 1 wherein said flexible restraining device comprises a double-slip knot formed in the bundled suspension lines.
Claim 4
Dependent Claim
31 words
The parachute canopy of claim 1 wherein said flexible restraining device comprises solely a pair of loops attached to the canopy skirt and adapted releasably to snub the bundled suspension lines.
Claim 5
Dependent Claim
32 words
The parachute canopy of claim 3 wherein one of said loops is a female loop adapted to receive a male loop through which the suspension lines are looped to be releasably snubbed.
Claim 6
Dependent Claim
43 words
The parachute canopy of claim 4 wherein a portion of said bundled suspension lines are threaded through each loop to form an intermediate loop through which a bight of the remainder of the respective suspension lines are passed to form a slip knot.
Claim 7
Dependent Claim
79 words
The parachute canopy of claim 1 wherein said flexible restraining device comprises a plurality of pairs of male and female loops, the male loops attached to one side of the drag surface and the female loops attached to a diametrically opposite point on the drag surface, the male and female loops adapted to be mated when the drag surface is folded together during packaging and an intermediate folded portion of the suspension lines being snubbed by the mated loops.
References Cited (Backward Citations)
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US3104855A
Cited
US2553909A
Cited
US2981505A
Cited
US3047261A
Cited
US3525491A
Cited
US3506225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |