Abstract: A centrifugal separator includes a rotor. In the rotor, contact portions each for coming into contact with an outer surface of the cap of a sample tube are formed in open end sides of storing holes. The contact portions respectively have notches at portions thereof which face an axis. An adapter for a centrifugal separator is also disclosed.

Abstract: Predetermined magnet mountable seats are provided on the lower portion of a rotor at equal angular intervals around the central axis of the rotor so that magnets may be mounted in one or more of the magnet mountable seats in an array pattern. Various array patterns may be provided by different combinations of presence and absence of magnets depending on the types of rotors. Arranged on a fixed mount in opposing relation with the array of magnet mountable seats are magnetic sensors along a circle around the central axis at angular intervals equal to or smaller than the angular intervals of the magnet mountable seats. A microprocessor identifies the type of rotor by detecting the array pattern of magnets on the basis of detected outputs from the magnetic sensors.

Abstract: In a centrifugal separator which has in the top panel of its case an opening communicating with a rotor chamber and a control panel disposed behind the opening, a lid for covering the opening has a cutaway made in its lower portion for receiving the control panel and the pivot of the lid is extended laterally to the rear of the control panel. The lid is spring biased toward its open position and is opened by depression of a foot pedal that is connected to a lid lock mechanism. The control panel includes an indicator of rotor rotational frequency and rotor chamber temperature, the indicator being supplied with electrical signals produced by sensors within the case of the centrifugal separator.

Abstract: A bucket, for use on a swing-type rotor in a centrifugal separator, shaped to receive specimen holders of several different configurations. The bucket has a pair of diametrically opposite side walls having central portions displaced radially outwardly as first and second arcuate wall portions extending around a central axis of the bucket and another pair of diametrically opposite side walls having upper portions displaced radially outwardly as inverted U-shaped bearings for allowing the bucket to be suspended on the rotor. The other side walls are spaced from each other by a distance equal to or greater than the diameter of the arcuate wall portions.

Abstract: A centrifugal separator capable of selectively mounting sedimentation tubes or capillary tubes on a rotor includes a container receptacle mounted in an outer box of the separator for receiving sedimentation tube containers. When the sedimentation tube containers are received in the container receptacle, their presence is detected to enable the rotor to rotate at a relatively high speed required when the capillary tubes mounted on the rotor.

Abstract: A rotor for a centrifuge comprises a rotatable shaft, a disc-shaped bottom plate fixed to the rotatable shaft, and a holder plate mounted on the bottom plate for holding sedimentation tubes. The holder plate is bodily constructed of a thin plate and has a bent portion positioned between a center and outer edge thereof and projecting upwardly. The bent portion includes a surface directed toward the center of the holder plate and having a plurality of holes for insertion therethrough of the sedimentation tubes. The bottom plate has a plurality of holes aligned with the holes in the holder plate for receiving the sedimentation tubes therein.

Abstract: A light emitting element and a photo detector are disposed opposite each other in an outer housing of a centrifuge. When an angle rotor is mounted on a motor shaft, light emitted from the light emitting element is received by the photo detector without being intercepted by the angle rotor and, by the output of the photo detector, a permissible maximum revolving speed of the angle rotor is set high. When a swing rotor is mounted on the motor shaft, the light from the light emitting element is intercepted by the swing rotor, and hence is not received by the photo detector and, by the output of the photo detector, a permissible maximum revolving speed of the swing rotor is set low.

Abstract: A centrifuge is provided with a rotor having a plurality of spaced arms each of which has formed integrally therewith stepped portions projecting towards adjacent arms. Tube rack carrying test tubes are each placed between adjacent arms and a centrifugal force applied to the tube rack is received by abutment of engaging portions of the tube rack with the stepped portions of the arms. A cylindrical wind shield is fixed to the rotor in a manner to surround the rotor and the tube racks. The upper open end of the wind shield is almost closed by sectorial plate portions of the arms and one end face of each tube rack.

Abstract: In a swinging type rotor of a centrifugal machine of the type wherein the rotor is provided with a plurality of equally spaced radial arms and each arm is provided with a pair of trunnion pins for hanging buckets, a through opening extending in a direction perpendicular to a longitudinal axis of each arm is formed near an outer end thereof. A holding shaft with its opposite end surfaces inclining away from the longitudinal axis is non-rotatorily inserted into the through opening and a pair of trunnion pins are threaded into the opposite end surfaces to hang buckets. Directions of screw threads of the pair of trunnion pins are opposite so that when the buckets are swung under centrifugal force, threading of the trunnion pins are tightened.

Abstract: In a swinging type rotor of a centrifugal machine of the type wherein the rotor is provided with a plurality of equally spaced radial arms and each arm is provided with a pair of trunnion pins for hanging buckets, a through opening extending in a direction perpendicular to a longitudinal axis of each arm is formed near an outer end thereof. A pair of hollow trunnion pins are inserted into opposite ends of the through openings. The hollow trunnion pins are provided with oppositely directed screw threads mating with a threaded pin. Outer portions of the trunnion pins are inclined toward the arm. Directions of the screw threads of the trunnion pins and of the threaded pin are selected such that when the buckets are swung about the trunnion pins under centrifugal force threading of the trunnion pins are tightened.

Abstract: In a centrifuge in which a truncated-cone-shaped angle rotor is disposed in an outer casing and driven by a motor disposed in the outer casing and a plurality of sample tube containers are mounted in the angle rotor to extend radially along its peripheral surface, an air guide is provided for guiding air from the outside of the outer casing to the peripheral surface of the angle rotor, by which the air thus guided flows down the peripheral surface of the angle rotor to cool it.

Abstract: In a centrifuge, a rotor is housed in an inner housing and driven by a motor disposed outside thereof. By the rotation of the rotor, gas is blown off to be exhausted from the inner housing through exhaust ports formed therein, and at the same time, gas is drawn into the inner housing through an intake formed in a lid of the inner housing to cool the rotor. A guide is provided around the inner housing, by which the gas exhausted from the exhaust ports is led to one end portion of the motor to flow into the motor through holes made in a motor frame to cool the motor. The gas passing into the motor is discharged from the other end of the motor and then expelled to the outside of an outer casing of the centrifuge.

Abstract: An apparatus for preventing vibration in a centrifugal separator comprising an upright electric motor supported by a resilient member from a machine casing and wherein excessive vibration of the motor is detected for opening an electric power circuit of the motor. A mercury type vibration sensitive element is employed in the detector and comprises a mercury contact in a metallic casing. The vibration sensitive element is attached to a resilient plate and is in pressure contact with a lateral surface of a casing of the motor.

Abstract: A vibration-isolating apparatus for a centrifuge comprising a rotor mounted by means of at least one coil spring in a casing, wherein to dampen vibrations, a flexible belt is wound longitudinally on the coil spring around both ends thereof in a plurality of turns. The belt can be clamped to the ends of the coil spring.