Patents by Inventor Klaus Stroucken
Klaus Stroucken has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20070049480Abstract: A screw conveyor intended and formed for use in a decanter centrifuge for separation of solid particles from a fluid compound, comprising a central body, at least one conveyor thread and at least one baffle bridging a flow path formed between different parts of the conveyor thread. The screw conveyor has at least two originally separate parts, each of which comprises a portion of said conveyor thread and which are kept together axially. The baffle constitutes a separate member arranged to be kept in place between said parts of the screw conveyor, when these parts are kept together axially, and has a portion which forms a part of the conveyor thread in an area where the conveyor thread intersects with and extends past the baffle.Type: ApplicationFiled: May 27, 2004Publication date: March 1, 2007Applicant: Alfa Laval Corporate ABInventors: Klaus Stroucken, Rolf Ridderstrale, Robert Geiding, Kasper Hoglund
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Patent number: 6716153Abstract: In a decanter centrifuge having a rotor and a screw conveyor the rotor is suspended only at its one end, the rotational axis of the rotor extending vertically. The inlet of the rotor for a sludge containing liquid to be separated as well as the rotor outlet for liquid having been freed from sludge are situated at the upper end of the rotor, whereas a sludge outlet for separated sludge is situated at the lower end of the rotor. The rotor as well as the screw conveyor are adapted to be driven through shafts situated at the upper end of the rotor. By the invention it becomes possible by simple implementation to adapt the decanter centrifuge for different separation duties, since the location of the sludge outlet can be chosen freely without other parts of the decanter centrifuge preventing this.Type: GrantFiled: October 4, 2002Date of Patent: April 6, 2004Assignee: Alfa Laval ABInventors: Klaus Stroucken, Rolf Riddersträle
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Patent number: 6712751Abstract: In a decanter centrifuge having a rotor and a screw conveyor the rotor is suspended only at its one end, the rotational axis of the rotor extending vertically. The inlet of the rotor for a sludge containing liquid to be separated as well as the rotor outlet for liquid having been freed from sludge are situated at the upper end of the rotor, whereas a sludge outlet for separated sludge is situated at the lower end of the rotor. The rotor as well as the screw conveyor are adapted to be driven through shafts situated at the upper end of the rotor. By the invention it becomes possible by simple implementation to adapt the decanter centrifuge for different separation duties, since the location of the sludge outlet can be chosen freely without other parts of the decanter centrifuge preventing this.Type: GrantFiled: October 4, 2002Date of Patent: March 30, 2004Assignee: Alfa Laval ABInventors: Klaus Stroucken, Rolf Ridderstråle
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Patent number: 6537191Abstract: In a centrifugal separator for separating solids from a liquid mixture in which the solids in the form particles are suspended in a liquid having a density less than that of the particles the centrifugal separator includes a rotor rotatable at a first speed. A screw conveyor is arranged in and coaxial with the rotor and rotates at a second speed differing from the first speed. A drive device is adapted for rotation of the rotor at the first speed and the screw conveyor at the second speed. The rotor is totally supported at one end only through a rotor shaft that is arranged so that the rotor central axis extends substantially vertically. The rotor includes an inlet for the mixture, in the form of at least one inlet channel which extends into the rotor at one end and a liquid outlet for separated liquid, in the form of at least one outlet channel which extends out of the rotor at one end, and a sludge outlet for separated solids situated at an opposite end of the rotor.Type: GrantFiled: November 22, 2000Date of Patent: March 25, 2003Assignee: Alfa Laval ABInventors: Klaus Stroucken, Rolf Ridderstråle
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Publication number: 20030032541Abstract: In a decanter centrifuge having a rotor (1) and a screw conveyor (2) the rotor is suspended only at its one end, the rotational axis (R) of the rotor extending vertically. The inlet (22) of the rotor (1) for a sludge containing liquid to be separated as well as the rotor outlet (12; 67) for liquid having been freed from sludge are situated at the upper end of the rotor, whereas a sludge outlet (13) for separated sludge is situated at the lower end of the rotor. The rotor (1) as well as the screw conveyor (2) are adapted to be driven through shafts (5, 8) situated at the upper end of the rotor. By the invention it becomes possible by simple means to adapt the decanter centrifuge for different separation duties, since the location of the sludge outlet (13) can be chosen freely without other parts of the decanter centrifuge preventing this.Type: ApplicationFiled: October 4, 2002Publication date: February 13, 2003Inventors: Klaus Stroucken, Rolf Ridderstrale
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Publication number: 20030032540Abstract: In a decanter centrifuge having a rotor (1) and a screw conveyor (2) the rotor is suspended only at its one end, the rotational axis (R) of the rotor extending vertically. The inlet (22) of the rotor (1) for a sludge containing liquid to be separated as well as the rotor outlet (12; 67) for liquid having been freed from sludge are situated at the upper end of the rotor, whereas a sludge outlet (13) for separated sludge is situated at the lower end of the rotor. The rotor (1) as well as the screw conveyor (2) are adapted to be driven through shafts (5, 8) situated at the upper end of the rotor. By the invention it becomes possible by simple means to adapt the decanter centrifuge for different separation duties, since the location of the sludge outlet (13) can be chosen freely without other parts of the decanter centrifuge preventing this.Type: ApplicationFiled: October 4, 2002Publication date: February 13, 2003Inventors: Klaus Stroucken, Rolf Ridderstrale
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Patent number: 5941811Abstract: In a centrifugal rotor having inlet channels (23) which are situated between a stack of axially separated conical separation discs (13) and the rotor end wall (10), against which the separation discs turn their apex ends, there is formed a counter pressure chamber (22) in an area where the inlet channels (23) communicate with one end of several distribution channels (21) extending through the stack of separation discs. The counter pressure chamber (22) is free of entrainment members, so that liquid leaving the inlet channels (23) is allowed to rotate in the counter pressure chamber at a smaller angular speed than the rotor. Furthermore, the counter pressure chamber (22), communicates with a radially outer part of the rotor separation chamber (9) through a space (35) situated outside a flow space (36), through which separated liquid is to flow from the interspaces between the separation discs to a number of outlet channels (27) in the vicinity of said rotor end wall (10).Type: GrantFiled: October 16, 1997Date of Patent: August 24, 1999Assignee: Alfa Laval ABInventors: Rolf Ridderstr.ang.le, Klaus Stroucken
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Patent number: 5897484Abstract: In a centrifugal rotor having inlet channels (23) situated between a stack of axially separated conical separation discs (13) and the rotor end wall (10), towards which the separation discs turn their apex ends, there is formed a counter pressure chamber (22) in an area where the inlet channels (23) communicate with one end of several distribution channels (21) extending through the stack of separation discs. The counter pressure chamber (22) is free of entrainment members, so that liquid leaving the inlet channels (23) is allowed to rotate in the counter pressure chamber at a smaller angular speed than the rotor. Further, the counter pressure chamber (22), communicates with a radially outer portion of the rotor separation chamber (9) through a sludge passage (34), which opens in the separation chamber at a level radially outside the stack of separation discs.Type: GrantFiled: October 16, 1997Date of Patent: April 27, 1999Assignee: Alfa Laval ABInventors: Rolf Ridderstr.ang.le, Klaus Stroucken
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Patent number: 5186708Abstract: The rotor of a centrifugal separator includes two axially separated end walls and one surrounding wall situated between the end walls. The end walls and a stack of separation discs within the rotor are maintained axially together by a central fastener. The surrounding wall, which is separate from the two end walls, is movable axially during rotor operation relative to at least one of the end walls. The surrounding wall has an inner diameter at the areas where it seals with the ends walls that is smaller than the portions between those sealing areas.Type: GrantFiled: June 28, 1991Date of Patent: February 16, 1993Assignee: Alfa-Lavel Separation ABInventors: Klaus Stroucken, Rolf Ridderstrale
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Patent number: 4930412Abstract: In a centrifuge rotor for separation of two liquids having different densities from a mixture thereof a stack of conical separation discs (21) is arranged in the separation chamber (13) with the base portions of the separation discs turned towards one end and with the apex portions of the separation discs turned towards the other end of the separation chamber. According to the invention the separation chamber (13) has an inlet for mixture situated at the end, towards which the separation discs turn their apex portions, and an outlet for separated relatively heavy liquid situated at the opposite end. The inlet for liquid mixture as well as both outlets for the separated liquids are situated at the same axial end wall of the centrifuge rotor.Type: GrantFiled: September 28, 1988Date of Patent: June 5, 1990Assignee: Alfa-Laval Separation ABInventor: Klaus Stroucken
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Patent number: 4915682Abstract: A liquid separator has a centrifuge rotor (1) with a set of conical separation discs (21) arranged coaxially in the separation chamber (13). The inlet of the separation chamber is formed as inlet passages (20) which extend radially outwards from a central inlet chamber (16) in the rotor, along that end wall of the separation chamber, towards which the apex ends of the separation discs face. The inlet passages (20) are formed between that end wall and a partition member (18, 19) situated between the rotor end wall and the separation discs (21). The outlet of the separation chamber (13) for separated liquid is formed by a number of channels (22) through the partition member (18, 19) and aligned channels through tubular members (23) bridging said inlet passages (20).Type: GrantFiled: September 27, 1988Date of Patent: April 10, 1990Assignee: Alfa-Laval Separation ABInventor: Klaus Stroucken
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Patent number: 4698053Abstract: In a centrifuge rotor, the separation chamber (21) of which contains a set of conical separation discs (10), these are guided radially by means of guiding means (11) extending axially through the discs. At their ends, the guiding means (11) are fixed relative to the rotor body (1,2) in its periphery direction and radially. The rotor body has an upper part (1) and a lower part (2), which are held axially together at their peripheral portions. A distributor has a base portion (7) on which the separation discs (10) rest, and a neck portion (6) which extends centrally up through the disc set. The distributor is radially guided relative to the lower part and the upper part, respectively, of the rotor body. Cylindrical guiding surfaces (9) are present between the neck portion (6) and the upper rotor part (1) and, possibly, also between the base portion (7) and the lower rotor part (2).Type: GrantFiled: July 1, 1986Date of Patent: October 6, 1987Assignee: Alfa-Laval Separation ABInventor: Klaus Stroucken
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Patent number: 4643708Abstract: A centrifugal rotor has (a) an axially movable primary slide (5) for closing or opening peripheral outlets (11) and bordering a closing chamber (14) having inlet (15) and outlet (16) for a closing liquid, and (b) an axially movable secondary slide (20) for allowing or stopping flow through said closing liquid outlet (16), the secondary slide (20) having opposite sides bordering an opening chamber (22) and a closing chamber (21). An axially movable part is located radially outside said closing liquid outlet (16) and forms a partition (12) between the closing chambers (14 and 21) of the primary and secondary slides; the secondary slide's closing chamber (21) is closed radially inwards by an annular seal (24) between the secondary slide (20) and part (12a) of said partition (12); and the secondary slide (20) when opening uncovers an annular opening for passage of a closing liquid from the primary slide's closing chamber (14) to the secondary slide's opening chamber (22).Type: GrantFiled: August 27, 1985Date of Patent: February 17, 1987Assignee: Alfa-Laval Separation ABInventors: Klaus Stroucken, Bengt-Olof Gustafsson
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Patent number: 4636319Abstract: In order to subject a valve within the rotor of a centrifugal separator to a certain liquid pressure, the rotor being supported by a vertical drive shaft (13), a liquid surface is maintained during operation of the rotor very close to the axis of the rotor, this surface being formed within a central channel (12) through said drive shaft (13). The lower end of the drive shaft, in which the channel (12) opens axially through an orifice (31) having its surrounding edge at the desired radial level for the liquid surface, is rotated in a liquid body which is kept in a container (25) below the drive shaft (13).Type: GrantFiled: June 7, 1985Date of Patent: January 13, 1987Assignee: Alfa-Laval Separation ABInventor: Klaus Stroucken
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Patent number: 4191325Abstract: A centrifuge rotor has a first part axially displaceable into and from abutment against a second part of the rotor during operation of the centrifuge, the rotor also having peripheral outlet openings for separated sludge which are formed by and between said rotor parts. One of the rotor parts has grooves forming said outlet openings when the two parts abut each other, said parts forming a continuous opening around the periphery of the rotor when the two parts are separated from each other.Type: GrantFiled: August 9, 1978Date of Patent: March 4, 1980Assignee: Alfa-Laval ABInventors: Klaus Stroucken, Torbjorn Winberg, Kaj Lindfors