US3599861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge for separation of mixtures of solids and liquids of different weight
Assignee: Individual
•
Filing: 1969-04-23
•
Granted: 1971-08-17
•
Expires: 1989-04-23
Abstract
Abstract A centrifuge for separating mixtures consisting of solids and at least one liquid comprises a rotatable drum formed by two opposed hollow cones in one of which a hollow worm is coaxial and rotatable relative to the drum. The worm forms with the conical portions of the drum a precentrifuging chamber which communicates with a postcentrifuging chamber and mixture fed into the worm passes into the precentrifuging chamber so that solids sludge is fed out through an outlet remote from the postcentrifuging chamber. Liquids separated from the sludge pass into the postcentrifuging chamber and are centrifugally separated to pass, according to weight, out of the chamber through ducts arranged at different distances from the axis of rotation and through outlets appropriate thereto.
Inventors
- 👤 Mario Demartini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:12
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/20; B04B1/2016; B30; B30B; B30B9/00; B30B9/02; Y; Y10; Y10S; Y10S494/00; Y10S494/901
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
228 words
A centrifuge for separating mixtures consisting of solids and at least two different heavy liquids, comprising a rotatable drum (20), said rotatable drum being provided with a first precentrifuging chamber (41), a hollow solids-conveying worm (19) coaxial with and rotatable relative to the said first drum chamber (41), said worm (19) communicating with one end of said first chamber, inlet means (45) connected to the interior of the drum (20) by which a mixture to be separated is delivered to the interior of the drum, said drum (20) being further provided with a second, postcentrifuging chamber (42), port means (50) at the end of said first chamber (41) adjacent to the said mixture delivery inlet means (45) and communicating with the said postcentrifuging chamber (42), the said postcentrifuging chamber (42) being provided with at least two outflow ducts (58, 60), each communicating with the postcentrifuging chamber at different distances from the axis of rotation of the drum, blade means (62) in the said postcentrifuging chamber connected to said drum for delivering any solid materials against the outflow openings for the heavy liquids, and a third, frustoconical separating chamber (141) disposed around the postcentrifuging chamber (42), a pair of walls (22, 222) rotating together with said drum (20) defining said separation chamber (141), said separation chamber (141) communicating at its wider end with the said first precentrifuging chamber (41).
Claim 2
Dependent Claim
228 words
A centrifuge for separating mixtures consisting of solids and at least two different heavy liquids, comprising a rotatable drum (20), said rotatable drum being provided with a first precentrifuging chamber (41), a hollow solids-conveying worm (19) coaxial with and rotatable relative to the said first drum chamber (41), said worm (19) communicating with one end of said first chamber, inlet means (45) connected to the interior of the drum (20) by which a mixture to be separated is delivered to the interior of the drum, said drum (20) being further provided with a second, postcentrifuging chamber (42), port means (50) at the end of said first chamber (41) adjacent to the said mixture delivery inlet means (45) and communicating with the said postcentrifuging chamber (42), the said postcentrifuging chamber (42) being provided with at least two outflow ducts (58, 60), each communicating with the postcentrifuging chamber at different distances from the axis of rotation of the drum, blade means (62) in the said postcentrifuging chamber connected to said drum for delivering any solid materials against the outflow openings for the heavy liquids, and a third, frustoconical separating chamber (141) disposed around the postcentrifuging chamber (42), a pair of walls (22, 222) rotating together with said drum (20) defining said separation chamber (141), said separation chamber (141) communicating at its wider end with the said first precentrifuging chamber (41).
Claim 3
Dependent Claim
44 words
A centrifuge according to claim 1, wherein the port means (50) includes cleaning devices (53, 55) therefor, and movable relative thereto, said cleaning devices comprising actuating means (57, 153) coupled to and operable by the relative rotary displacement between said drum and said worm.
Claim 4
Dependent Claim
51 words
A centrifuge according to claim 1, wherein communication between the precentrifuging chamber and the postcentrifuging chamber is effected by pipes approximately parallel to the axis of the drum and which traverse and are secured to a flange carried by said worm and which separates the precentrifuging chamber from the postcentrifuging chamber.
Claim 5
Dependent Claim
44 words
A centrifuge according to claim 3, wherein each said pipe supports a throttling head axially reciprocable relative to the inlet to the pipe and which on the forward stroke thereof forms with the pipe inlet an annular through-flow gap directed towards the precentrifuging chamber.
Claim 6
Dependent Claim
42 words
A centrifuge according to claim 4, wherein the throttling head is carried by an axially reciprocable rod reciprocation of which is effected by a wobble- or swash-plate rotatable with the drum and which is inclined relative to the axis of the drum.
Claim 7
Dependent Claim
115 words
A centrifuge according to claim 1 wherein the drum consists of first (21) and second (22) hollow cones the bases of which are secured one to the other, wherein the solids-conveying worm is conical, is housed in the first drum-forming cone with the base chamber thereof directed towards the base of the first drum-forming cone, and the sides thereof form with the interior of the first drum-forming cone said precentrifuging chamber, and wherein one of said walls (222) defining the postcentrifuging chamber (42) is a lining insert (222) rotatable with the interior of said second hollow cone (22) and said postcentrifuging chamber is further defined by a base portion (419) of the conical solids-conveying worm.
Claim 8
Dependent Claim
115 words
A centrifuge according to claim 1, wherein communication between said first outlet and the interior of the precentrifuging chamber is effected through at least one radial outflow opening formed in the drum, wherein the first outlet is formed in a stationary housiNg arranged around the drum, and wherein around the portion of the drum provided with said radial opening there is disposed a stationary interception baffle which is annularly continuous but open at one axial end, which closely encircles a ring of blades provided externally on said drum portion and which are arranged to convey sludge intercepted by the interception baffle towards said first outlet and also to scraping the inner surface of the baffle.
Claim 9
Dependent Claim
25 words
A centrifuge according to claim 1, wherein the drum and the solids-conveying worm are coupled by a transmission gear including a safety device against overloads.
Claim 10
Dependent Claim
44 words
A centrifuge according to claim 8, wherein the safety device comprises a shearable coupling element including an insulated electrical conductor interposed in a circuit arranged to trigger a warning signal and switching off the drive of the drum, upon shearing of the coupling element.
Claim 11
Dependent Claim
66 words
A centrifuge according to claim 8, wherein the transmission gear comprises gears rotatable respectively one with the drum and one with the worm, a first drive gear rotatable with a countershaft and meshing with the drum gear, a second drive gear freely rotatable on the countershaft, and a coupling element coupling said first and second drive gears and which is shearable upon exceeding a predetermined torque.
Claim 12
Dependent Claim
49 words
A centrifuge according to claim 10, wherein the gear rotatable with the drum is secured to an extension the drum formed as a hollow shaft the gear rotatable with the worm is secured to an end of the worm which extends out of the drum through said hollow shaft.
Claim 13
Dependent Claim
35 words
A centrifuge according to claim 10, wherein the countershaft has at least one radial bore connected through an axial bore of the countershaft and through a stationary oil pipe with a supply of lubricating oil.
Claim 14
Dependent Claim
24 words
A centrifuge according to claim 12, wherein the axial bore of the countershaft is connected through an oil pump to a lubricating oil container.
Claim 15
Dependent Claim
19 words
A centrifuge according to claim 13, wherein the container comprises the lower portion of a casing for the gears.
Claim 16
Dependent Claim
36 words
A centrifuge according to claim 12, wherein the axial bore of the countershaft is connected in oiltight and airtight manner to a terminal portion coaxial thereto of an oil pipe connected to a lubricating oil container.
Claim 17
Dependent Claim
19 words
A centrifuge according to claim 15, wherein the container comprises the lower portion of a casing for the gears.
Claim 18
Dependent Claim
53 words
Centrifuge according to claim 1 wherein said solids-conveying worm has a hollow terminal part encircling the blade means (62), said blade means being shaped to convey residual solids separated in the postcentrifuging chamber in the opposite direction to the advance of the sludge of solids caused by the worm in the precentrifuging chamber.
References Cited (Backward Citations)
GB259222A
Cited
US2129992A
Cited
US2734681A
Cited
US2528974A
Cited
US2743865A
Cited
US2733856A
Cited
US3348767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |