US3583657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft crash recorder units
Assignee: ML Aviation Ltd
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Filing: 1968-12-17
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Granted: 1971-06-08
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Expires: 1988-12-17
Abstract
Abstract Apparatus for underwater ejection of a buoyant aircraft crash recorder container is described. The apparatus operates in response to a pressure corresponding to a predetermined depth of water. When a pressure sensor senses this pressure, high-pressure gas is released and ejects the crash recorder container together with a cover which normally closes an opening giving access to a space in which the container is housed.
Inventors
- 👤 George Boyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:16
CPC Classifications
G; G12; G12B; G12B9/00; G12B9/02; B; B63; B63G; B63G8/00; B63G8/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
Underwater ejection apparatus for a buoyant aircraft crash recorder container, comprising: a pressure sensor; a source of high-pressure gas having a puncturable diaphragm seal; a spring-operated device, including a toggle linkage which is moved overcenter by said pressure sensor on sensing a predetermined pressure and a puncturing member so controlled by said toggle linkage as to move when said toggle linkage moves overcenter to puncture said diaphragm sealing said gas source and to release said gas; and a telescope ejection device to which said released gas flows, said ejection device thereupon ejecting said container from said apparatus.
Claim 2
Dependent Claim
97 words
Underwater ejection apparatus for a buoyant aircraft crash recorder container, comprising: a pressure sensor; a source of high-pressure gas having a puncturable diaphragm seal; a spring-operated device, including a toggle linkage which is moved overcenter by said pressure sensor on sensing a predetermined pressure and a puncturing member so controlled by said toggle linkage as to move when said toggle linkage moves overcenter to puncture said diaphragm sealing said gas source and to release said gas; and a telescope ejection device to which said released gas flows, said ejection device thereupon ejecting said container from said apparatus.
Claim 3
Dependent Claim
112 words
Underwater ejection apparatus for a buoyant aircraft crash recorder container, comprising: a pressure sensor, said pressure sensor including a cylinder containing a piston which together define a closed space within said cylinder, whereby variations in pressure result in relative movement between said piston and said cylinder so as to balance consequent variations in force on said piston and said cylinder; a spring-operated device so controlled by said pressure sensor as to operate when a predetermined pressure is sensed; a source of high-pressure gas which is released by operation of said device; and a telescopic ejection device to which said released gas flows, said ejection device thereupon ejecting said container from said apparatus.
Claim 4
Dependent Claim
112 words
Underwater ejection apparatus for a buoyant aircraft crash recorder container, comprising: a pressure sensor, said pressure sensor including a cylinder containing a piston which together define a closed space within said cylinder, whereby variations in pressure result in relative movement between said piston and said cylinder so as to balance consequent variations in force on said piston and said cylinder; a spring-operated device so controlled by said pressure sensor as to operate when a predetermined pressure is sensed; a source of high-pressure gas which is released by operation of said device; and a telescopic ejection device to which said released gas flows, said ejection device thereupon ejecting said container from said apparatus.
Claim 5
Dependent Claim
113 words
Underwater ejection apparatus for a buoyant aircraft crash recorder container, comprising; means defining a space for housing said container; a cover closing an opening giving access to said space; a pressure sensor; a source of high-pressure gas having a puncturable diaphragm seal; a spring-operated device, including a toggle linkage which is moved overcenter by said pressure sensor on sensing a predetermined preSsure, and a puncturing member so controlled by said toggle linkage as to move when said toggle linkage moves overcenter to puncture said diaphragm sealing said gas source; and a telescopic ejection device to which said released gas flows, said ejection device thereupon ejecting said container and said cover from said apparatus.
Claim 6
Dependent Claim
113 words
Underwater ejection apparatus for a buoyant aircraft crash recorder container, comprising; means defining a space for housing said container; a cover closing an opening giving access to said space; a pressure sensor; a source of high-pressure gas having a puncturable diaphragm seal; a spring-operated device, including a toggle linkage which is moved overcenter by said pressure sensor on sensing a predetermined preSsure, and a puncturing member so controlled by said toggle linkage as to move when said toggle linkage moves overcenter to puncture said diaphragm sealing said gas source; and a telescopic ejection device to which said released gas flows, said ejection device thereupon ejecting said container and said cover from said apparatus.
Claim 7
Dependent Claim
130 words
Underwater ejection apparatus for a buoyant aircraft crash recorder container, comprising: means defining a space for housing said container; a cover closing an opening giving access to said space; a pressure sensor including a cylinder containing a piston which together define a closed space within said cylinder, whereby variations in pressure result in relative movement between said piston and said cylinder so as to balance consequent variations in force on said piston and said cylinder; a spring-operated device so controlled by said pressure sensor as to operate when a predetermined pressure is sensed; a source of high-pressure gas which is released by operation of said device; and a telescopic ejection device to which said released gas flows, said ejection device thereupon ejecting said container and said cover from said apparatus.
Claim 8
Dependent Claim
130 words
Underwater ejection apparatus for a buoyant aircraft crash recorder container, comprising: means defining a space for housing said container; a cover closing an opening giving access to said space; a pressure sensor including a cylinder containing a piston which together define a closed space within said cylinder, whereby variations in pressure result in relative movement between said piston and said cylinder so as to balance consequent variations in force on said piston and said cylinder; a spring-operated device so controlled by said pressure sensor as to operate when a predetermined pressure is sensed; a source of high-pressure gas which is released by operation of said device; and a telescopic ejection device to which said released gas flows, said ejection device thereupon ejecting said container and said cover from said apparatus.
Claim 9
Dependent Claim
36 words
Apparatus according to claim 4, in which said means defining a space for housing said container also enclose said pressure sensor and are formed with an opening to permit the sensor to sense the external pressure.
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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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |