Patent US3756545A successfully refreshed from Google Patents.
US3756545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft load ejector
Assignee: R Alkan et Cie
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Filing: 1971-10-06
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Granted: 1973-09-04
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Expires: 1991-10-06
Abstract
Abstract In this retractable jettisoning device the ejection piston, whether single or telescopic, mounted in a cylinder of conventional type, is hollow and its inner cavity comprises a tubular distributor close at its outer end but provided adjacent this end with lateral ports adapted to co-act with an inner surface of the piston end for causing its inner space and the rear end of the piston to communicate with the atmosphere when this tubular distributor emerges from the ejection piston at the end of an expansion stroke of the ejection piston whereas the same movement of the tubular distributor uncovers lateral ports formed at the rear end of the piston to cause the fluid pressure in the chamber formed between the piston and the tubular distributor to act against the lower end of the fluid-tight portion of the piston in its cylinder, in order to move the piston upwards.
Inventors
- 👤 P Coutin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:54
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/02; B64D1/04; B64D1/06; F; F42; F42B; F42B3/00; F42B3/006
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
180 words
A retractable ejector device for jettisoning a load from an aircraft comprising a cylinder having an inlet port at one end and a restricted open end, at least one piston positioned in and spaced from said cylinder, having a hollow interior open at both ends of said piston, a head at its inner end portion, slidable in said cylinder and of a greater diameter than said cylinder restricted open end, a restriction in said hollow interior and at least one port through said inner end portion, a tubular distributor positioned in and spaced from said piston hollow interior, having a head at its inner end slideable in said piston, an exterior recess in said tubular distributor head, a flange at its other end portion of greater diameter than said piston restriction and ports below said flange opening into said distributor interior and means closing said distributor at its outer end whereby gas from said cylinder port will move said piston outwardly and then said distributor for engaging and jettisoning the load and return said distributor and piston into said cylinder.
Claim 2
Dependent Claim
180 words
A retractable ejector device for jettisoning a load from an aircraft comprising a cylinder having an inlet port at one end and a restricted open end, at least one piston positioned in and spaced from said cylinder, having a hollow interior open at both ends of said piston, a head at its inner end portion, slidable in said cylinder and of a greater diameter than said cylinder restricted open end, a restriction in said hollow interior and at least one port through said inner end portion, a tubular distributor positioned in and spaced from said piston hollow interior, having a head at its inner end slideable in said piston, an exterior recess in said tubular distributor head, a flange at its other end portion of greater diameter than said piston restriction and ports below said flange opening into said distributor interior and means closing said distributor at its outer end whereby gas from said cylinder port will move said piston outwardly and then said distributor for engaging and jettisoning the load and return said distributor and piston into said cylinder.
Claim 3
Dependent Claim
14 words
A device according to claim 1 wherein said piston comprises a single tubular element.
Claim 4
Dependent Claim
87 words
A device according to claim 1 wherein said piston comprises a plurality of telescopic tubular elements with each inner element thereof having an upper section sliding in fluidtight relationship with its surrounding elements, each of said surrounding elements having at least one port therethrough beneath its upper section and positioned for being cleared by the upper section of its inner element whereby the complete retraction of the inner element permits the gas to press against the upper section of its surrounding element driving said surrounding element inwardly.
Claim 5
Dependent Claim
27 words
A device according to claim 1 wherein a ring threadedly engages said cylinder open end providing the restriction therein and said piston is slideable in said ring.
Claim 6
Dependent Claim
26 words
A device according to claim 1 wherein a ring threadedly engages said piston interior providing the restriction therein and said distributor is slideable through said ring.
Claim 7
Dependent Claim
30 words
A device according to claim 1 wherein said closing means is a plug detachably mounted in said distributor outer end and extending outwardly and laterally of said piston other end.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |