Patent US4004764A successfully refreshed from Google Patents.
US4004764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drogue chute extraction
Assignee: United States Department of the Navy
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Filing: 1974-05-13
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Granted: 1977-01-25
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Expires: 1994-05-13
Abstract
Abstract A drogue parachute deployment system for an ejection seat comprises a dro parachute mounted in a bag on the seat, a rocket motor, and a tow line attached between the parachute and the rocket motor. Upon firing of the rocket motor, the bag is caused to rip and the parachute is deployed.
Inventors
- 👤 Vernon D. Burklund
- 👤 W. James Stone
- 👤 Joseph A. Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:33
CPC Classifications
B; B64; B64D; B64D17/00; B64D17/62; B64D17/72; B64D17/725
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A method for deploying a drogue parachute, said method comprising the steps of: igniting a rocket motor which is attached by means of a tow line to a closed bag containing a drogue parachute packed into the closed bag; pulling, by means of said rocket motor and said tow line, the bag and drogue parachute therein through the air; and ripping said bag off said drogue parachute through the action of said motor for releasing said drogue parachute into an air stream from said bag and said rocket motor.
Claim 2
Independent Claim
89 words
A method for deploying a drogue parachute, said method comprising the steps of: igniting a rocket motor which is attached by means of a tow line to a closed bag containing a drogue parachute packed into the closed bag; pulling, by means of said rocket motor and said tow line, the bag and drogue parachute therein through the air; and ripping said bag off said drogue parachute through the action of said motor for releasing said drogue parachute into an air stream from said bag and said rocket motor.
Claim 3
Dependent Claim
83 words
Apparatus for deploying a drogue parachute comprising: a. a bag in which said drogue parachute is packed; b. a tow line attached by one end to said bag; and c. a rocket motor attached to the other end of said tow line; said bag being so constructed that when said rocket motor is fired and a predetermined amount of force is exerted on it through said tow line it will rip away from said drogue parachute and allow the drogue parachute to deploy.
Claim 4
Dependent Claim
83 words
Apparatus for deploying a drogue parachute comprising: a. a bag in which said drogue parachute is packed; b. a tow line attached by one end to said bag; and c. a rocket motor attached to the other end of said tow line; said bag being so constructed that when said rocket motor is fired and a predetermined amount of force is exerted on it through said tow line it will rip away from said drogue parachute and allow the drogue parachute to deploy.
Claim 5
Dependent Claim
21 words
Apparatus according to claim 2 wherein said rocket motor is in a launcher attached to the back of an aircraft seat.
Claim 6
Dependent Claim
24 words
Apparatus according to claim 3 wherein said bag in which the drogue parachute is packed is mounted on the back of an aircraft seat.
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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |