US3666174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blower apparatus for air-supported structures
Assignee: Fried Krupp AG
•
Filing: 1969-11-14
•
Granted: 1972-05-30
•
Expires: 1989-11-14
Abstract
Abstract A blower apparatus has a substantially closed housing formed as a trailer and an air passage through this housing. A blower in the passage sucks air in through one of two filters, i.e., a normal dust filter or an ABC (atomic, biological, chemical) filter, and expels it into the chamber formed between two walls of a double-walled air-supported structure. Some of the pressurized air is leaked into the housing to maintain this at superatmospheric pressure so that contaminants cannot enter. A heat exchanger is provided in the air stream for air which is used to pressurize the area enclosed by the structure, and a shunt from this exchanger back to the passage upstream of the blower is controlled by a thermostatic valve. The pressure in the chamber is greater than that in the area.
Inventors
- 👤 Rudolf Brylka
- 👤 Hans-Jurgen Kleinwachter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:58
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/003; F24F13/00; F24F13/20; F24F8/00; F24F8/10; F24F8/108; F24F8/15; F24F11/00; F24F11/0001; F24F2011/0002; F24F2011/0004
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
112 words
An apparatus for supplying air under pressure to an airsupported structure formed with an air-support chamber, said apparatus comprising: a substantially air-tight housing; means forming an air passage through said housing, said passage having an air-inlet end communicating with the atmosphere around said housing and an air-outlet end connectable to said structure; blower means along said passage for drawing air in through said inlet end and supplying air under pressure to said outlet end; and means communicating between the interior of said housing and said passage and disposed between said blower means and said outlet end for maintaining the interior of said housing at a pressure above that of the surrounding atmosphere.
Claim 2
Independent Claim
112 words
An apparatus for supplying air under pressure to an airsupported structure formed with an air-support chamber, said apparatus comprising: a substantially air-tight housing; means forming an air passage through said housing, said passage having an air-inlet end communicating with the atmosphere around said housing and an air-outlet end connectable to said structure; blower means along said passage for drawing air in through said inlet end and supplying air under pressure to said outlet end; and means communicating between the interior of said housing and said passage and disposed between said blower means and said outlet end for maintaining the interior of said housing at a pressure above that of the surrounding atmosphere.
Claim 3
Dependent Claim
22 words
The apparatus defined in claim 1, further comprising an air filter in said passage between said blower means and said inlet end.
Claim 4
Dependent Claim
49 words
The apparatus defined in claim 2 wherein said structure encloses a space, is double walled, and forms between its walls said air-support chamber, said apparatus further comprising means connecting said passage to said space for pressurizing same to a pressure less than that to which said chamber is pressurized.
Claim 5
Dependent Claim
24 words
The apparatus defined in claim 3, further comprising heater means in said means connecting said passage to said space for heating air passing therethrough.
Claim 6
Dependent Claim
39 words
The apparatus defined in claim 4, further comprising shunt means extending from said heater means to said passage between said blower means and said filter, and valve means in said shunt means for restricting the flow cross section thereof.
Claim 7
Independent Claim
27 words
The apparatus defined inclaim 5 wherein said valve means includes a thermostat responsive to temperature in said space, said thermostat being operatively connected to said valve means.
Claim 8
Dependent Claim
44 words
The apparatus defined in claim 2 wherein said air filter is primarily a dust filter, said apparatus further comprising at least one ABC filter in said passage upstream of said blower means, and valve means for restricting air flow through one of said filters.
Claim 9
Dependent Claim
64 words
The apparatus defined in claim 7 wherein said ABC filter offers more internal resistance to air flow than said dust filter, said valve means including at leaSt one valve between said dust filter and said blower means, said filters being connected in parallel, said inlet end of said passage being an inlet for said ABC filter and a separate inlet for said dust filter.
Claim 10
Dependent Claim
25 words
The apparatus defined in claim 1 wherein said housing is transportable and is formed as a trailer adapted to be drawn behind an automotive vehicle.
Claim 11
Dependent Claim
228 words
The apparatus defined in claim 9 wherein said housing is rectangular and has top, bottom, side, and end walls, said apparatus further comprising: a dust filter mounted on one end wall of said housing at said inlet end of said passage; a collecting chamber in said passage downstream of said dust filter; a pair of valves in said passage downstream of said collecting chamber; a compartment in said passage between said valves and said blower means; a pair of upright cylindrical ABC filters standing on said bottom wall and each having an air inlet extending from its upper portion through said top wall and an air outlet extending from its lower portion to said compartment chamber, said passage being thereby branched upstream of said compartment; a dispersing chamber in said passage downstream of said blower means, said dispersing chamber being formed with at least one port constituting said means communicating between the interior of said housing and said passage; a conduit extending from said dispersing chamber through the other of said end walls and forming a connection for coupling with said air-support chamber; a heater in said passage downstream of said dispersing chamber, said passage being thereby branched downstream of said displacing chamber; a shunt extending between said passage at said heater and said compartment for airflow therebetween; and thermostatically-controlled valve means in said shunt for closing same.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |