US3826015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for continuous cooling of hot powder
Assignee: Resonac Holdings Corp
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Filing: 1973-05-24
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Granted: 1974-07-30
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Expires: 1993-05-24
Abstract
Abstract In cooling a hot powder containing coarse grains or lumps by a fluidizing method, the course grains or lumps spontaneously accumulate at the bottom portion of the fluidizing device in use and impede the fluidization of the powder, making it necessary to remove the accumulated coarse grains or lumps from the device. This invention provides an improved device wherein the bottom is inclined and a groove incorporating a rotary screw and having at one end thereof a coarse grain discharge means is formed at the base of the inclined bottom. This device provides continuous cooling of the hot powder and at the same time permits discharge of coarse grains or lumps.
Inventors
- 👤 M Kaneda
- 👤 S Kuroyama
- 👤 H Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:21
CPC Classifications
F; F28; F28D; F28D13/00; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
111 words
A device for continuous cooling of a hot powder, comprising in combination an inlet for a hot powder disposed at one end thereof, an outlet for a cooled powder at the opposite end thereof, a cooling pipe distributed therein for passage of a coolant, a groove having a perforated base plate and incorporating a screw meshed with a rotation mechanism, a bottom plate perforated and inclined toward the said groove, injection means disposed below the said bottom plate and the said groove for spurting air required for fluidizing the powder and a mechanism disposed to adjoin the end of the groove so as to discharge coarse grains out of the device.
Claim 2
Independent Claim
111 words
A device for continuous cooling of a hot powder, comprising in combination an inlet for a hot powder disposed at one end thereof, an outlet for a cooled powder at the opposite end thereof, a cooling pipe distributed therein for passage of a coolant, a groove having a perforated base plate and incorporating a screw meshed with a rotation mechanism, a bottom plate perforated and inclined toward the said groove, injection means disposed below the said bottom plate and the said groove for spurting air required for fluidizing the powder and a mechanism disposed to adjoin the end of the groove so as to discharge coarse grains out of the device.
Claim 3
Dependent Claim
90 words
A device according to claim 1, wherein there is provided a coaRse grain discharge means which comprises a coarse grain accumulating part joined to the end of the groove formed in the bottom plate of the device, possessed of a perforated base plate and provided with an inlet for fluidizing air and a spurt for releasing air used to discharge coarse grains and a vertical lift pipe disposed directly above the said part and provided with an upper opening protruding from the device enclosure and a downwardly diverging lower opening.
Claim 4
Dependent Claim
32 words
A device according to claim 1, wherein the bottom surface is formed of at least one member selected from the group consisting of perforated plates of sintered powder metal and ceramic material.
Claim 5
Dependent Claim
34 words
A device according to claim 3, wherein the powder metal to be used in producing the sintered metal is finely divided stainless steel powder having a pore diameter of 3 to 10 Mu .
Claim 6
Dependent Claim
23 words
A device according to claim 1, wherein the bottom plate is inclined by an angle in the range of between 30* and 40*.
Claim 7
Dependent Claim
40 words
A device according to claim 1, wherein the perforated plate is formed of one member selected from the group consisting asbestos and rockwool and reinforced with one member selected from the group consisting of wire netting and punched metal sheet.
References Cited (Backward Citations)
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US3585732A
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US3621585A
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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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |