Patent US3664096A successfully refreshed from Google Patents.
US3664096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for suspending particles in a liquid
Assignee: Neyrpic BMB SA
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Filing: 1970-03-03
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Granted: 1972-05-23
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Expires: 1990-03-03
Abstract
Abstract Particles to be suspended in a liquid are fed into an enclosure maintained at less than atmospheric pressure. In the enclosure the particles are subjected to mixing and then centrifuging to assist the vacuum in removal of air from the particles. The particles leaving the centrifuge are subjected to liquid jets to assist in removal of air and the particles then fall onto a layer of the suspending liquid and thereafter in homogeneous suspension in the liquid leave the enclosure.
Inventors
- 👤 Pierre Lejeune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:04
CPC Classifications
D; D21; D21F; D21F1/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
Apparatus for suspending particles in a liquid comprising a substantially airtight enclosure, means for drawing a partial vacuum within said enclosure, feed apparatus for the particles exterior of said enclosure, distributing means between said feed apparatus and said enclosure passing through the wall of said enclosure and providing an air seal between said enclosure and said feed apparatus, a bin disposed within said enclosure beneath said distributing means, an agitator in said bin, a rotating distributor at the lower end of said agitator outside said bin, a wide mouth receiver within said enclosure and spaced from and beneath said rotating distributor concentric with said bin, at least one feed tuyere means for supplying suspension liquid to said receiver and at least one evacuation tuyere for the particle-liquid suspension flowing from said receiver.
Claim 2
Dependent Claim
132 words
Apparatus for suspending particles in a liquid comprising a substantially airtight enclosure, means for drawing a partial vacuum within said enclosure, feed apparatus for the particles exterior of said enclosure, distributing means between said feed apparatus and said enclosure passing through the wall of said enclosure and providing an air seal between said enclosure and said feed apparatus, a bin disposed within said enclosure beneath said distributing means, an agitator in said bin, a rotating distributor at the lower end of said agitator outside said bin, a wide mouth receiver within said enclosure and spaced from and beneath said rotating distributor concentric with said bin, at least one feed tuyere means for supplying suspension liquid to said receiver and at least one evacuation tuyere for the particle-liquid suspension flowing from said receiver.
Claim 3
Dependent Claim
40 words
Apparatus as described in claim 1, including at least one header for pulverizing fluid within said enclosure above said rotating distributor and concentric with said bin, the pulverizing fluid being directed toward the surface of said receiver from said header.
Claim 4
Dependent Claim
27 words
Apparatus as described in claim 1, said agitator within said bin having a vertical rotating shaft and horizontally rotating paddles within said bin supported by said shaft.
Claim 5
Dependent Claim
27 words
Apparatus as described in claim 3, said rotating distributor outside said bin being a centrifugal turbine with horizontal rotor mounted on the lower end of said shaft.
Claim 6
Dependent Claim
43 words
Apparatus as described in claim 1, said receiver including a wide mouth basin, said feed tuyere discharging through the center of said basin and a peripheral gutter concentric with said basin receiving liquid-particle suspension overflow therefrom said evacuation tuyere opening into said gutter.
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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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |