Patent US3726499A successfully refreshed from Google Patents.
US3726499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of deploying a parachute by a rocket under low speed conditions
Assignee: Stencel Aero Engineering Corp
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Filing: 1971-05-11
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Granted: 1973-04-10
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Expires: 1991-05-11
Abstract
Abstract A parachute development system as described in copending application Ser. No. 848,932 now U.S. Pat. No. 3,595,501 uses as a pilot parachute to orient a rocket in the airstream so that when the rocket is fired downstream, it deploys the main parachute. The invention herein accomplishes orientation of the rocket rapidly and without the use of the pilot parachute under low speed conditions, by releasing the rocket to trail behind the load which is being accelerated in an upstream direction in the airstream.
Inventors
- 👤 F Stencel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:43
CPC Classifications
B; B64; B64D; B64D17/00; B64D17/22; B64D17/38; B64D17/383
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
In a parachute deployment system including a load, means for accelerating the load in an upstream direction in the airstream, a parachute attached to the load, a rocket attached to the parachute for deploying the parachute into the airstream in a downstream direction, and a pilot parachute attached to the rocket for ordinarily orienting the rocket in the downstream direction, the improvement in the method of deploying the parachute which comPrises the steps of: accelerating the load in an upstream direction in the airstream; sensing a condition typical to an air speed of less than 50 knots; releasing the rocket in response to said sensed condition to permit said rocket to move into the airstream in a downstream direction prior to inflation of the pilot parachute, while simultaneously continuing to accelerate the load in the upstream direction in the airstream; and firing the rocket to propel the rocket downstream in the airstream to deploy the parachute into the airstream prior to inflation of the pilot parachute.
Claim 2
Dependent Claim
166 words
In a parachute deployment system including a load, means for accelerating the load in an upstream direction in the airstream, a parachute attached to the load, a rocket attached to the parachute for deploying the parachute into the airstream in a downstream direction, and a pilot parachute attached to the rocket for ordinarily orienting the rocket in the downstream direction, the improvement in the method of deploying the parachute which comPrises the steps of: accelerating the load in an upstream direction in the airstream; sensing a condition typical to an air speed of less than 50 knots; releasing the rocket in response to said sensed condition to permit said rocket to move into the airstream in a downstream direction prior to inflation of the pilot parachute, while simultaneously continuing to accelerate the load in the upstream direction in the airstream; and firing the rocket to propel the rocket downstream in the airstream to deploy the parachute into the airstream prior to inflation of the pilot parachute.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |