FI59933B - SKAKARE - Google Patents

Description

[B] (11) RELEASE CQQ 7 7 ^ SSTä '; UTLÄGGNINGSSKRIFT O 7 7 00 'S *' (SI) Kr.lk.3 / l * .CI.3 B σι P 11/00 FINLAND — FINLAND (M) PKMtttlhtkcmu · —PttmtaMttknlni 753251 (22) Hak «ntlipilvt - Anattknlnpd» · 19.11.75 * (M) Alkuptlvt — GIW | h «tad * g ^ 9 j_l 75 (41) Tullut {ulklMktl - Bllvtt offantllg p

National Board of Patents and Registration .... ....... ·? · 1 1 _ ', (44) Nlhtfvikiiptnon | · moonLjulksbun pvm. -

Patent · och registerstyrelsen AmttkM utlsgd och utl. * Krift * n publie «r» d 31.07. Ö1 (32) (33) (31) Requested # ttiotk * u * —Begird priority (71) Osmo Antero Suovaniemi, Armas Lindgrenintie 15 A, 00570 Helsinki 57,

Suomi-Finland (FI) (72) Osmo Antero Suovaniemi, Helsinki, Jukka Topias Tervamäki, Helsinki,

Suomi-Finland (FI) (7I4) Ruska & Co (5k) Shaker - Skakare

The invention relates to a shaker comprising a body, a shaker stand, elements or members fitted to the shaker stand for one or more test tubes, a cuvette, a test tube or a cuvette system, spring elements, and one or more electric motors. Such shaking mixers are already known, in which a forced movement caused by an eccentric or palm has generally been used to generate a shaking movement in a rack for moving a test tube or cuvette.

The disadvantage of these shakers is that the forced movement produced by the eccentric requires a high power relative to the mass to be shaken, since the bearing of the eccentric on the shaker rack consumes energy. The parts of such a forced eccentric shaker often increase the mass of the rotating and shaking parts so much that the specific oscillation number of the device is different from the desired shaking oscillation rate, increasing the energy requirement because the test tube rack has to be forced to shake at a different frequency. Finally, such a forced eccentric shaker requires a lot of relatively complex parts and is thus expensive to manufacture.

The shaker according to the invention is characterized in that the shaker rack and one or more electric motors fixedly connected thereto are fixed to the frame by means of spring elements and that one or more eccentric masses are arranged on the shaft of the electric motors in a manner known per se. shaking Iiik-keen.

Claims (2)

2,59933 By placing a flywheel or a mass whose center of gravity is not the axis of rotation 1a on the shaft of the electric motor and appropriately selecting the rigidity of the shaker rack springs, effective shaking at very low power can be achieved when the electric motor rotates at or near the system's characteristic frequency. In addition to the small bearings' own bearings, the device does not require any additional bearings, precise machining and adaptations. Generally, an electric motor is run at only a fraction of its rated power and speed, resulting in a long motor life. The forces and moments applied to the shaft of the electric motor are also smaller than in the shaker solutions required by the forced movement. The invention will become more apparent from the following description and the accompanying drawing. On the frame 1 are the spring elements 2 suspended? an attached electric motor 3 and a shaker rack k attached thereto in which the test tube, test tubes test tube or cuvettes 5 can be placed. or e.g. the bottom of the test tube is placed against the shaker member k and the test tubes are supported e.g. The shaft of the electric motor 3 has a suitably sized eccentric mass 6 which, as it rotates: in response, causes the motor 3 »to shake the rack and the test tubes 5 to rotate. The amplitude of the movement, i.e. the frequency and the shaking frequency, can be designed appropriately by selecting the spring constant, mass 6 and eccentricity of the spring elements 2 and the rotational speed of the motor 3 so that the test tubes 5 8 liquids 7 stirring vorticity. In this case, even solid components or precipitates 10 are effectively mixed with the liquid / 7- The mixing is started and its magnitude is adjusted by means of a potentiometer 11 and a knob 12 or other similar speed control system in series with the electric motor 3. The spring constants of the spring elements 2 can be chosen either symmetrically the same or different on different sides of the truss, depending on whether the rotation 8 of the liquid 7 is desired to be completely round or to reciprocate. The bottom plate 13 of the shaker is selected from a heavy material or provided with weights in order to prevent vibration of the body 1 of the shaker. Soft rubbers 14 are placed on the bottom of the shaker, which prevent the transmission of vibrations and sounds to the table plate 15. The invention is, of course, not limited only to the application example presented above, but can vary considerably in detail within the scope of the claims. PatenttIvaat1mukset A shaker comprising a body (1), a shaker (h), elements or members fitted to the shaker (h), one or more test tubes, a cuvette, a test tube stoa