Device for shaking samples

Abstract

A device for shaking samples includes a carrier (62) and a drive element (66) which is rotatably bearing-mounted on the carrier (62) about a drive axle and is drivable by a drive (65). Furthermore, the device includes a tray (61) arranged for loading the samples (69), a tray shaft (67) which is connected to the tray (61) and is bearing-mounted eccentrically on the drive element (66), and a counterweight (66a) which is attached to the drive element (66) and is adapted to compensate for an imbalance occurring during operation of the device with a defined load on the tray (61). A center of gravity of the counterweight (66a) is located opposite the tray shaft (67) in relation to the drive axle of the drive element (66). The center of gravity of the counterweight (66a) and a center of gravity of the tray (61) together with the tray shaft (67) and defined load are located in the same plane orthogonal to the drive axle. When the drive element (66) rotates about the drive axle, a first torque, which is exerted on the drive axle by the tray (61) together with the tray shaft (67) and defined load, is equal in magnitude and directed in the opposite direction to a second torque, which is exerted on the drive axle by the counterweight (66a). As a result, the counterweight (66a) is adapted in such a way that it compensates for both a static and a dynamic imbalance on the drive axle. Accordingly, a shaking frequency of the tray (61) due to the drive (65) reaches at least 1000 rpm, in particular at least 2000 rpm.

Dependencies are inferred from the claim text.