US4049221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief of inter-compartment differential pressure in aircraft
Assignee: Lockheed Martin Corp
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Filing: 1975-12-24
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Granted: 1977-09-20
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Expires: 1995-12-24
Abstract
Abstract Apparatus for equalizing the pressure between two compartments of an airplane in the event of sudden depressurization of one of the compartments, and including a closure panel disposed across an opening between the two compartments and functioning as either a blowout panel to be forced bodily from the opening upon development of an excessive differential pressure between the two compartments, or as a frangible panel which is shattered in response to attainment of the undesired differential pressure, to thus allow very open communication between the compartments preventing damage to a wall therebetween.
Inventors
- 👤 Claude Lloyd Fountain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:06
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/18; B64C2001/009; Y; Y10; Y10S; Y10S137/00; Y10S137/91; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1759; Y10T137/1767
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
193 words
In an aircraft having a fuselage containing a plurality of compartments which are pressurized when the aircraft is in flight, the improvement comprising: a wall located between and separating two of the pressurized compartments and containing an opening through which those two compartments may communicate; a frangible closure extending across the opening and at least partially closing off communication therethrough; a single striker operable to strike said frangible closure with a force sufficient to break it and thereby permit the rapid flow of air between the two compartments; and spring means yieldingly urging said striker along a path toward said frangible closure with a force sufficient to break said closure; detent means for holding said striker in a retracted position against the force of said spring means; means communicating with both compartments and movable in either of two opposite directions, repsonsive to an increase in pressure differential between the two compartments resulting from a presssure decrease in either compartment to actuate said detent means and release said striker for movement by said spring means and breaking said frangible closure; whereby the pressure is equalized on opposite sides of said wall, preventing damage thereto.
Claim 2
Dependent Claim
193 words
In an aircraft having a fuselage containing a plurality of compartments which are pressurized when the aircraft is in flight, the improvement comprising: a wall located between and separating two of the pressurized compartments and containing an opening through which those two compartments may communicate; a frangible closure extending across the opening and at least partially closing off communication therethrough; a single striker operable to strike said frangible closure with a force sufficient to break it and thereby permit the rapid flow of air between the two compartments; and spring means yieldingly urging said striker along a path toward said frangible closure with a force sufficient to break said closure; detent means for holding said striker in a retracted position against the force of said spring means; means communicating with both compartments and movable in either of two opposite directions, repsonsive to an increase in pressure differential between the two compartments resulting from a presssure decrease in either compartment to actuate said detent means and release said striker for movement by said spring means and breaking said frangible closure; whereby the pressure is equalized on opposite sides of said wall, preventing damage thereto.
Claim 3
Dependent Claim
24 words
The improvement as recited in claim 1, including grillwork at one side of said closure preventing damage thereto from within one of said compartments.
Claim 4
Dependent Claim
24 words
The improvement as recited in claim 1, further including a grill extending across one side of said closure and protecting it against accidental breakage.
Claim 5
Dependent Claim
170 words
In an aircraft having a fuselage containing a plurality of compartments which are pressurized when the aircraft is in flight, the improvement comprising: a wall located between and separating two of the pressurized compartments and containing an opening through which the two compartments may communicate; a frangible closure extending across the opening and at least partially closing off communication therethrough; a striker movable along a path to strike said frangible closure; spring means yieldingly urging said striker toward said frangible closure with a force sufficient to break said closure, and thereby permit the rapid flow of air between the two compartments; a detent ball engageable against a shoulder of said striker to retain said striker in a retracted position against the force of said spring means; and a differential pressure actuated element movable essentially transversely of said striker and containing two spaced grooves for partially receiving said ball and releasing said striker in response to the decrease in pressure in either of the two compartments relative to the other compartment.
Claim 6
Dependent Claim
170 words
In an aircraft having a fuselage containing a plurality of compartments which are pressurized when the aircraft is in flight, the improvement comprising: a wall located between and separating two of the pressurized compartments and containing an opening through which the two compartments may communicate; a frangible closure extending across the opening and at least partially closing off communication therethrough; a striker movable along a path to strike said frangible closure; spring means yieldingly urging said striker toward said frangible closure with a force sufficient to break said closure, and thereby permit the rapid flow of air between the two compartments; a detent ball engageable against a shoulder of said striker to retain said striker in a retracted position against the force of said spring means; and a differential pressure actuated element movable essentially transversely of said striker and containing two spaced grooves for partially receiving said ball and releasing said striker in response to the decrease in pressure in either of the two compartments relative to the other compartment.
Claim 7
Dependent Claim
167 words
In an aircraft having a fuselage containing a plurality of compartments which are pressurized when the aircraft is in flight, the improvement comprising: a wall located between and separating two of the pressurized compartments and containing an opening through which those two compartments may communicate; a closure extending across said opening and at least partially closing off communication therethrough, and constructed to open automatically in response to an increase in pressure differential between the two compartments, to thereby allow a rapid flow of air between the compartments equalizing the pressure at opposite sides of said wall and preventing damage thereto; said closure being a blowout panel which is adapted to be forced bodily from the opening by the differential pressure; a grill extending across one side of said closure for preventing damage thereto; and a connector means yieldingly securing said grill to said wall and being releasable by the force of the differential pressure to free said grill and said panel for movement away from said wall.
Claim 8
Dependent Claim
167 words
In an aircraft having a fuselage containing a plurality of compartments which are pressurized when the aircraft is in flight, the improvement comprising: a wall located between and separating two of the pressurized compartments and containing an opening through which those two compartments may communicate; a closure extending across said opening and at least partially closing off communication therethrough, and constructed to open automatically in response to an increase in pressure differential between the two compartments, to thereby allow a rapid flow of air between the compartments equalizing the pressure at opposite sides of said wall and preventing damage thereto; said closure being a blowout panel which is adapted to be forced bodily from the opening by the differential pressure; a grill extending across one side of said closure for preventing damage thereto; and a connector means yieldingly securing said grill to said wall and being releasable by the force of the differential pressure to free said grill and said panel for movement away from said wall.
Claim 9
Dependent Claim
37 words
The improvement as recited in claim 5, in which said connector means include resilient elements on said grill, and receptacles on said wall for receiving said elements and from which said elements are releasable by resilient deflection.
Claim 10
Dependent Claim
129 words
In an aircraft having a fuselage containing a plurality of compartments which are pressurized when the aircraft is in flight, the improvement comprising: a wall located between and separating two of the pressurized compartments and containing an opening through which those two compartments may communicate; a closure extending across the opening and at least partially closing off communciation therethrough, and constructed to open automatically in response to an increase in pressure differential between the two compartments, to thereby allow a rapid flow of air between the compartments equalizing the pressure at opposite sides of said wall and preventing damage thereto; and a grill on each side of said closure connected to said wall and releasable therefrom by said differential pressure to free said closure for separation from said wall.
Claim 11
Dependent Claim
129 words
In an aircraft having a fuselage containing a plurality of compartments which are pressurized when the aircraft is in flight, the improvement comprising: a wall located between and separating two of the pressurized compartments and containing an opening through which those two compartments may communicate; a closure extending across the opening and at least partially closing off communciation therethrough, and constructed to open automatically in response to an increase in pressure differential between the two compartments, to thereby allow a rapid flow of air between the compartments equalizing the pressure at opposite sides of said wall and preventing damage thereto; and a grill on each side of said closure connected to said wall and releasable therefrom by said differential pressure to free said closure for separation from said wall.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |