232 results about "Centrifuge rotor" patented technology

This document describes a device for cleaning of crankcase gases from a combustion engine, and a combustion engine having such a device. An inlet conduit is connected to a crankcase of the combustion engine. A centrifugal separator receives a flow of crankcase gases from the crankcase via the inlet conduit and comprises a routable centrifuge rotor for centrifuging the crankcase gases. A drive device drives the centrifuge rotor. An outlet conduit discharges cleaned crankcase gases from the centrifugal separator. The rotary speed of the drive device, and thus the rotary speed of the centrifuge rotor, is controllable depending on the gas pressure in the crankcase. An export conduit may be connected to the inlet conduit and adapted to enable discharge of a flow of crankcase gases from the crankcase by-passing the centrifugal separator depending on the gas pressure in the crankcase. An import conduit may be connected to the inlet conduit and adapted to enable feeding of a flow of air from the surroundings to the crankcase depending on the gas pressure in the crankcase.

A centrifugal separator comprises a centrifuge rotor (1), which has a wall (10) defining an interior of the rotor (1) and which during operation of the centrifugal separator is rotatable about a rotational axis (y) with respect to a stationary pipe member (2) comprising at least one passage for the transport of material. The pipe member (2) is provided to extend into the interior of the centrifuge rotor through an aperture of the rotor (1). A product separated during operation is collected in a chamber (9) provided in the proximity of said aperture and partly defined by an end wall portion (11) extending around said aperture and the pipe member (2) in such a manner that a clearance gap is formed between a radially inner edge of the end wall portion (11) and the pipe member (2). The end wall portion (11) is arranged to be deformable in the case that the pipe member contacts the end wall portion during the operation of the separator.

A separating disk for a disk package of a centrifuge rotor has a tapering shape and extends around an axis (x) of rotation, and along a rotary symmetric surface. The separating disk is configured in such a way that it creates an interspace between the separating disk and an adjacent separating disk in the disk package, and comprises first protrusions extending outwardly from the rotary symmetric surface and second protrusions extending inwardly from the rotary symmetric surface. Each first and second protrusion defines a contact zone adapted to abut the adjacent separating disk. The contact zone of the first protrusions is displaced in relation to the contact zone of the second protrusions. The first and second protrusions are provided after each other in the peripheral direction of the separating disk. The tapering shape and the protrusions of the separating disks have been provided though pressing of a blank of a material against a tool part having a shape corresponding to the tapering shape of the protrusions of the pressed separating disk.

A centrifugal blood processing apparatus comprising a centrifuge rotor, a separation chamber, a tubing set for conducting blood components and fluids and having an inlet line, and an outlet line. Apparatus tests flow conditions using a red light-green light sensor to detect non-recoverable hemolysis during priming by identifying a high R/G ratio, preferably a ratio of greater than or equal to fifty (50), prior to the beginning of the first return of blood components to a donor followed by identifying a R/G ratio at least as great as one and one tenth (1.1) together with a green signal less than a predetermined value, preferably less than or equal to one thousand (1000) reflectance units. If these conditions are detected, an alarm is given and the apheresis procedure is discontinued.

A system for filtering and processing blood that is simple to implement and that reduces the need for human intervention. The system may be used to collect red blood cells (RBCs). For such a system, a disposable set may be provided with an inlet port, an RBC container, a centrifuge rotor having a variable total volume, and a filter, along with tubing connecting the port, the container, the rotor and the filter. The filter is located in tubing between the inlet port and the rotor. A control unit is also provided and includes a spinner in which the rotor may be held, a flow-control arrangement for controlling flow among the various components of the disposable set, and an electronic controller. The whole blood is directed by the flow-control arrangement from the inlet through the filter to the rotor. The rotor includes an elastic diaphragm, and the control unit's flow-control arrangement includes a pump or other device for applying a positive and negative pressure to the rotor's elastic diaphragm. The spinner rotates the rotor so as to separate the whole blood into plasma and RBCs. Preferably, the plasma is urged out of the rotor first and returned to the donor, while the rotor is still being spun. After the plasma has been removed from the rotor, the RBCs are urged from the rotor to an RBC container. In preferred embodiments, the filter is a white blood cell filter, so that white blood cells are filtered from the blood before it reaches the rotor.

The present invention includes a system and method for the management of specimens ordinarily manipulated via tubes. The invention may include a flexible, removable tube holder that is linear when placed in a rack and curved when placed into a centrifuge rotor. The system provides for the elimination of manual recording of the individual tubes, and also provides for the transference of the tubes from the rack to the centrifuge and back in a group.

The present invention relates to a lid for closing a centrifuge rotor, characterized by a positively locking rotation-activated closing mechanism, which, prepositioned on the centrifuge rotor, moves automatically into a closed position by virtue of the intrinsic weight of the lid.

A rotor and specimen holder assembly for producing a relatively low power, low audible level, cool running centrifuge. The centrifuge rotor assembly is designed to enable a specimen holder to retract into the body of the rotor during centrifugation to produce aerodynamic features.

In a centrifugal separator comprising a first and second separator part having a centrifuge rotor and rotates during operation relative to the first separator part. A space connecting the first and second separator parts houses a rotating liquid body during operation. A mechanical sealing device is provided at the space and includes a first sealing element on the first separator part having a first contact surface, and a second sealing element on the second separator part having a second contact surface. The liquid body on the first sealing element or the second sealing element and displaces the same axially so that the first and second contact surfaces are pressed against each other. A pre-tensioning element exerts force on the sealing element which acts to displace the first contact away from the second contact surfaces so that a gap is formed, forming a throttling.

In a centrifugal separator having a stationary part, a non-rotating part, is elastically connected to the stationery part, and a rotating part, rotates around an axis of rotation and comprises a centrifuge rotor and a rotating bearing-receiving element. The centrifuge rotor comprises a disk package with a plurality of separating disks. The rotating part is journalled in the non-rotating part so that the rotating part and the non-rotating part are commonly pivotable relative to the stationary part. A drive arrangement drives the rotating part about the axis of rotation within a range of revolutions. An inlet channel extends into the inner separation space for feeding of a medium to be separated. An outlet channel extends out from the inner separation space for discharge of a separated product. The bearing-receiving element is tubular. At least one of the inlet channel and the outlet channel extends through the bearing-receiving element.

A sample preprocessing system is capable of reducing centrifuging time, which accounts for the majority of time required for a preprocessing step, and at the same time, performing centrifuging under various conditions. A system management unit ascertains the states of a plurality of centrifuge devices, particularly comparing centrifuging start times and centrifuging termination times for the respective centrifuge devices, and selects the centrifuge device for which the processing time is shortest. Specifically, the system includes an adapter that forms a plurality of batches, sample transfer means for transferring a sample to the adapter, a plurality of centrifuge rotors that centrifuge the adapter in batch units, and calculation means for calculating in advance a start timing and a termination timing of the centrifuging in batch units, and the batch, into which samples are transferred, is controlled on the basis of at least one of the calculated start timing and termination timing.