Patent US3735868A successfully refreshed from Google Patents.
US3735868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation machine with vertically reciprocating aerators
Assignee: SKRUNDE A A LE
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Filing: 1970-11-17
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Granted: 1973-05-29
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Expires: 1990-11-17
Abstract
Abstract A flotation machine incorporating a chamber for pulp and means for removing therefrom separated products, as well as vibration aerators disposed therein and having ducts for the supply of air to their piston-like portions having openings for the outlet of said air and openings for the passage of pulp during the upward stroke of the aerators. The piston-like portion of each aerator is provided with flaps of elastic material adapted to close the openings for the passage of pulp in the course of the aerator downward stroke and open them in the course of the aerator upward stroke. As a result of such an arrangement, the operation of the machine is accompanied with an intensive stirring and aeration of pulp at low values of the vibrational speed of the aerator, owing to which there takes place a considerable reduction of the electric energy consumption and aerator wear.
Inventors
- 👤 A M Fedotov
- 👤 E S Alexeev
- 👤 G A Denisov
- 👤 K A Rundkvist
- 👤 A A Leningrad Skrunde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:17
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/16; B03D1/22; B03D1/1493; B03D1/24; B03D1/245; B03D1/1412
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
203 words
A flotation machine of the type having a chamber for aerating and agitating pulp, means for introducing the pulp into the chamber, air supply means, a vibrator for up-and-down movement, and means for removal of products separated from the pulp; said machine also having vibration aerator means in said chamber, comprising: rigidly interconnected ducts for distributing air from the supply means into the pulp through a plurality of air discharge openings in the ducts, means for spacing the ducts apart to provide a plurality of openings therebetween for flow of pulp between the ducts, means connecting said ducts with the vibrator for upward and downward strokes of the ducts through the pulp, and flaps of elastic material attached to each of said ducts and forking downwards therefrom so that flaps of mutually adjacent ducts close such openings between the ducts to the passage of pulp during the downward strokes and thereby provide a plurality of large piston-like portions of the vibration aerator during the downward strokes, and that they open said openings between the ducts for the passage of pulp in the course of the upward strokes and thereby reduce said piston-like portions to allow said flow of pulp during the upward strokes.
Claim 2
Dependent Claim
203 words
A flotation machine of the type having a chamber for aerating and agitating pulp, means for introducing the pulp into the chamber, air supply means, a vibrator for up-and-down movement, and means for removal of products separated from the pulp; said machine also having vibration aerator means in said chamber, comprising: rigidly interconnected ducts for distributing air from the supply means into the pulp through a plurality of air discharge openings in the ducts, means for spacing the ducts apart to provide a plurality of openings therebetween for flow of pulp between the ducts, means connecting said ducts with the vibrator for upward and downward strokes of the ducts through the pulp, and flaps of elastic material attached to each of said ducts and forking downwards therefrom so that flaps of mutually adjacent ducts close such openings between the ducts to the passage of pulp during the downward strokes and thereby provide a plurality of large piston-like portions of the vibration aerator during the downward strokes, and that they open said openings between the ducts for the passage of pulp in the course of the upward strokes and thereby reduce said piston-like portions to allow said flow of pulp during the upward strokes.
Claim 3
Dependent Claim
79 words
A flotation machine as set forth in claim 1, wherein said piston-like portions of each of the aforementioned aerators are composed of parts having a semitubular cross-section alongside whose walls are secured said flaps of elastic material said flaps being made forking downwards and being constructed and adapted, during the downward stroke of the aforementioned aerator, to simultaneously close the openings for the passage of pulp provided in said piston-like portion and the openings for the outlet of air.
Claim 4
Dependent Claim
49 words
A flotation machine as set forth in claim 1, wherein the aforementioned piston-like portions of each said aerator are composed of parts having a horseshoe-shaped cross-section, said flaps of elastic material being secured thereto in pairs to form shaped inserts provided with said openings for the outlet of air.
Claim 5
Dependent Claim
36 words
A flotation machine as set forth in claim 1, also including rigid vertically extending partitions in the form of strips arranged between said parts comprising the aforementioned piston-like portions of the aerator and alongside said parts.
Claim 6
Dependent Claim
47 words
A flotation machine as set forth in claim 1 wherein each of said rigidly interconnected ducts comprises elastic structure to provide said flaps and rigid structure at least partly inserted in said elastic structure to locate said flaps and said air discharge openings relative to one another.
Claim 7
Dependent Claim
39 words
A flotation machine as set forth in claim 5 wherein said rigid structure of each duct comprises a pair of structural parts, one facing the other and both being constructed and adapted to define said air discharge openings therebetween.
Claim 8
Dependent Claim
52 words
A flotation machine as set forth in claim 5 wherein said elastic structure of each duct comprises a body portion and three members forking dOwnwards therefrom, two of them providing said flaps and the third being disposed therebetween and constructed and adapted to secure said rigid and elastic structures to one another.
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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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |