US3682225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic safety curtain apparatus for air enclosing structures
Assignee: Ilc Industries Inc
•
Filing: 1970-06-08
•
Granted: 1972-08-08
•
Expires: 1990-06-08
Abstract
Abstract A safety curtain apparatus for automatically blocking an air opening in an air pressurized structure has means to retain a safety curtain in retracted position and release it to block the opening when undesired relative movement sufficient to cause unblocking of the opening occurs between parts of the structure by utilizing a releasable support means to hold the curtain retracted adjacent the opening at a first portion of the structure and a curtain releasing means operatively connecting between the support means and another portion of the structure and operative to release the curtain to cover the opening whenever significant undesired relative movement occurs.
Inventors
- 👤 Robert J Redden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:15
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/20; E04H15/22
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
122 words
A curtain device for automatically blocking a substantial loss of air from a passageway positioned in an inflatable structure comprising: a closeable passageway means positioned in said structure and defining an opening therein for allowing ingress to and egress from said structure; a movable curtain means releasably held for extension over said opening; and curtain releasing means automatically releasable in response to opening of said passageway means and operatively connected between said curtain means and said passageway means, whereby opening of said passageway means capable of causing a reduction in the inflation of said structure causes said curtain releasing means automatically to effect the extension of said movable curtain means over said opening so as to block the exit of air therethrough.
Claim 2
Dependent Claim
122 words
A curtain device for automatically blocking a substantial loss of air from a passageway positioned in an inflatable structure comprising: a closeable passageway means positioned in said structure and defining an opening therein for allowing ingress to and egress from said structure; a movable curtain means releasably held for extension over said opening; and curtain releasing means automatically releasable in response to opening of said passageway means and operatively connected between said curtain means and said passageway means, whereby opening of said passageway means capable of causing a reduction in the inflation of said structure causes said curtain releasing means automatically to effect the extension of said movable curtain means over said opening so as to block the exit of air therethrough.
Claim 3
Dependent Claim
51 words
The device of claim 1 in which said curtain releasing means includes a safety release means that is releasably connectable between said curtain means and said closeable passageway means, so that, when desired, it can be connected to effect a release of said curtain means when said passageway means is opened.
Claim 4
Dependent Claim
22 words
The device of claim 2 in which said safety release means is connectable to a door positioned in said closeable passageway means.
Claim 5
Dependent Claim
30 words
The device of claim 1 in which said curtain releasing means includes means for releasably holding said curtain means positioned so as to be extendable over said opening by gravity.
Claim 6
Dependent Claim
25 words
The device of claim 1 in which said curtain means is flexible and formed from a material that is resistant to the passage of air.
Claim 7
Dependent Claim
29 words
The device of claim 1 in which said curtain means is flexible and has a plurality of stiffening members therein which span the opening in said closeable passageway means.
Claim 8
Dependent Claim
18 words
The device of claim 4 in which said means for releasably holding said curtain means are breakaway straps.
Claim 9
Dependent Claim
20 words
The device of claim 7 in which said breakaway straps are maintained in curtain means holding position by snap fasteners.
Claim 10
Dependent Claim
37 words
The device of claim 1 in which said curtain releasing means is operative by the separation of said closeable passageway means from its connection to said inflatable structure that results in escapement of air from said structure.
Claim 11
Dependent Claim
20 words
The device of claim 9 in which said curtain device is detachable from said structure and said closeable passageway means.
Claim 12
Dependent Claim
128 words
A curtain device adapted to automatically block a substantial loss of air from a passageway positioned in an inflatable structure comprising: a movable curtain means adapted to be positioned adjacent to a closeable passageway means positioned in said inflatable structure that defines an opening therein for allowing ingress and egress to and from said structure, said curtain means extendable over said opening; and curtain releasing means automatically releasable in response to opening of said passageway means and operatively connectable between said curtain means and said passageway means, whereby opening of said passageway means, capable of causing a reduction in the inflation of said structure, automatically causes said curtain releasing means to effect an extension of said movable curtain means over said opening blocking the exit of air therethrough.
Claim 13
Dependent Claim
128 words
A curtain device adapted to automatically block a substantial loss of air from a passageway positioned in an inflatable structure comprising: a movable curtain means adapted to be positioned adjacent to a closeable passageway means positioned in said inflatable structure that defines an opening therein for allowing ingress and egress to and from said structure, said curtain means extendable over said opening; and curtain releasing means automatically releasable in response to opening of said passageway means and operatively connectable between said curtain means and said passageway means, whereby opening of said passageway means, capable of causing a reduction in the inflation of said structure, automatically causes said curtain releasing means to effect an extension of said movable curtain means over said opening blocking the exit of air therethrough.
Claim 14
Dependent Claim
132 words
A curtain device for automatically blocking a substantial loss of air from a passageway positioned in an inflatable structure comprising: a passageway means positioned in said structure and defining an opening therein, a closure means positioned in the passageway means so as to block the opening against access into said structure, a movable curtain means releasably held for extension over said passageway means; and curtain releasing means automatically releasable in response to opening of said passageway means and operatively connected between said curtain means and said closure means, whereby opening of said passageway means capable of causing a reduction in the inflation of said structure causes said curtain releasing means automatically to effect the extension of said movable curtain means over said opening so as to block the exit of air therethrough.
Claim 15
Dependent Claim
132 words
A curtain device for automatically blocking a substantial loss of air from a passageway positioned in an inflatable structure comprising: a passageway means positioned in said structure and defining an opening therein, a closure means positioned in the passageway means so as to block the opening against access into said structure, a movable curtain means releasably held for extension over said passageway means; and curtain releasing means automatically releasable in response to opening of said passageway means and operatively connected between said curtain means and said closure means, whereby opening of said passageway means capable of causing a reduction in the inflation of said structure causes said curtain releasing means automatically to effect the extension of said movable curtain means over said opening so as to block the exit of air therethrough.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |