US3780445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleansing device for powder processing apparatuses
Assignee: GEA Process Engineering AS
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Filing: 1972-04-04
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Granted: 1973-12-25
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Expires: 1992-04-04
Abstract
Abstract A cleansing device for cleaning perforated supporting plates in powder processing apparatuses, in which a flow of gas passes a perforated supporting plate more than one time or passes a number of perforated supporting plates for fluidizing a layer of powder on the plate or plates, comprising an arm parallel to the underside of the plate to be cleaned, said arm being provided with a number of gas nozzles connected with means for producing jets of gas shooting upwards against the underside, said arm being displaceable in a plane parallel to the underside of the plate in question.
Inventors
- 👤 O Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:49
CPC Classifications
F; F26; F26B; F26B3/00; F26B3/02; F26B3/06; F26B3/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
In a cleansing device for powder processing apparatuses including at least one perforated supporting plate, and means for producing a flow of gas through the perforations of the supporting plate for fluidizing a layer of powder present on the plate, the device being arranged such that the same volume of gas passes more than once through the supporting plate, the improvements characterized in that on the underside of the supporting plate which is intersected by the path of the gas flow at a point which, taken in the direction of the gas flow, is situated past a point where the path has already intersected the supporting plate, an arm is mounted parallel to the underside and has a plurality of gas nozzles directed against the underside, means connected to the arm for producing jets of gas from the nozzles shooting upwards against the underside, and means connected to the arm for moving it in a plane parallel to the underside.
Claim 2
Dependent Claim
160 words
In a cleansing device for powder processing apparatuses including at least one perforated supporting plate, and means for producing a flow of gas through the perforations of the supporting plate for fluidizing a layer of powder present on the plate, the device being arranged such that the same volume of gas passes more than once through the supporting plate, the improvements characterized in that on the underside of the supporting plate which is intersected by the path of the gas flow at a point which, taken in the direction of the gas flow, is situated past a point where the path has already intersected the supporting plate, an arm is mounted parallel to the underside and has a plurality of gas nozzles directed against the underside, means connected to the arm for producing jets of gas from the nozzles shooting upwards against the underside, and means connected to the arm for moving it in a plane parallel to the underside.
Claim 3
Dependent Claim
58 words
A cleansing device as claimed in claim 1, wherein the means for producing the fluidizing flow of gas and the means for producing the flow of gas through the nozzles are dimensioned such that the latter gas flow volume per unit of time is between 2 and 8% of the former gas flow volume per unit of time.
Claim 4
Dependent Claim
17 words
A cleansing device as claimed in claim 1, wherein the nozzles are directed obliquely against the underside.
Claim 5
Dependent Claim
40 words
A cleansing device as claimed in claim 1, wherein the supporting plate is circular in shape and the arm is pivotably mounted underneath the plate for rotation around an axis intersecting the center of the plate at a right angle.
Claim 6
Dependent Claim
46 words
A cleansing device as claimed in claim 1, wherein the supporting plate is elongated and rectangular, and the arm is mounted perpendicular to the longitudinal extension of the plate and is displaceable perpendicular to itself in a reciprocating direction across the entire length of the plate.
Claim 7
Dependent Claim
33 words
A cleansing device as claimed in claim 4, wherein the means for moving the arm operates at such a speed that the underside of the supporting plate is swept several times per minute.
Claim 8
Dependent Claim
15 words
A cleansing device as claimed in 1, further comprising means for intermittently supplying cleaning gas.
References Cited (Backward Citations)
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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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |