Patent US4013248A successfully refreshed from Google Patents.
US4013248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parachute equipment
Assignee: Individual
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Filing: 1975-05-30
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Granted: 1977-03-22
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Expires: 1995-05-30
Abstract
Abstract A parachute having a canopy defined by 24 gores, the crown of the canopy being drawn by means of a central shroud-line; the canopy being operated by valves with nozzles directing the air-flow off the center of the canopy and a group of vents to reduce dynamic loads at the moment of deployment of the parachute; the canopy having an arrangement of radial slots in its central section; to improve the parachute's reliability, the canopy is provided with nozzles directing the air-flow towards the center of the canopy; the canopy being operated by means of control shroud lines with one of the ends of the lines attached to free hems of the valves, while the other ends of the control shroud lines being provided with hand-grip knobs for operation by the user of the parachute.
Inventors
- 👤 Ljudmila Nikolaenva Kalabukhova
- 👤 Svetlana Ivanovna Rudevskaya
- 👤 Alexandr Alexandrovich Petrighenko
- 👤 Alberta Sergeevna Smurova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:22
CPC Classifications
B; B64; B64D; B64D17/00; B64D17/02; B64D17/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
266 words
A parachute provided with a canopy defined by radial gores joined together by radial seams, comprising a central shroud line; a system of radial vents in a central section of said canopy extending down to a fold line in the canopy and along a radial seam to reduce dynamic loads at the moment of deployment; stabilizing gores adjacent the periphery of said canopy at diametrically opposite sides; controlled valves disposed radially in canopy-sectors bounded by said stabilizing gores and reaching said fold line, each controlled valve being defined by a slot between a portion of a radial seam and a free hem of an adjoining gore overlapping it, the length of the slot exceeding that of said portion of the radial seam; first nozzles radially directing the air flow to the center of the canopy, constituted by a slot across a radial gore with two free hems, the length of one hem exceeding that of the other hem, and arranged at one side of the canopy between the sectors of said stabilizing gores; second nozzles adapted to direct the air flow radially off the center of said canopy, said second nozzles being constructed as said first nozzles and on the opposite side of said canopy between the sectors of said stabilizing gores; a group of vents in the sector of the second nozzles of the canopy including a central vent extending along the hem of the canopy across several radial gores, and lateral vents disposed symmetrically at the sides of said central vent between the hem of the canopy and said fold line of the canopy.
Claim 2
Dependent Claim
266 words
A parachute provided with a canopy defined by radial gores joined together by radial seams, comprising a central shroud line; a system of radial vents in a central section of said canopy extending down to a fold line in the canopy and along a radial seam to reduce dynamic loads at the moment of deployment; stabilizing gores adjacent the periphery of said canopy at diametrically opposite sides; controlled valves disposed radially in canopy-sectors bounded by said stabilizing gores and reaching said fold line, each controlled valve being defined by a slot between a portion of a radial seam and a free hem of an adjoining gore overlapping it, the length of the slot exceeding that of said portion of the radial seam; first nozzles radially directing the air flow to the center of the canopy, constituted by a slot across a radial gore with two free hems, the length of one hem exceeding that of the other hem, and arranged at one side of the canopy between the sectors of said stabilizing gores; second nozzles adapted to direct the air flow radially off the center of said canopy, said second nozzles being constructed as said first nozzles and on the opposite side of said canopy between the sectors of said stabilizing gores; a group of vents in the sector of the second nozzles of the canopy including a central vent extending along the hem of the canopy across several radial gores, and lateral vents disposed symmetrically at the sides of said central vent between the hem of the canopy and said fold line of the canopy.
Claim 3
Dependent Claim
58 words
The parachute as claimed in claim 1, in which the ratio between the total area of the group of vents in the sector of the second nozzles and the area of said sector of the canopy is 2:15, while the ratio between the area of each lateral vent and the central vent of the same sector is 3:5.
References Cited (Backward Citations)
US3099426A
Cited
US3136508A
Cited
US3228636A
Cited
US3173636A
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US3298639A
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US3385540A
Cited
US3433441A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |