FR2544220A2 - Blood agitator - Google Patents

Abstract

The invention relates to the improvement of a blood agitator according to French Patent No. 81 04918. According to this invention the agitator in accordance with the main patent is characterised by an agitation system, the tray of which is driven in a sinusoidal motion by virtue of a rotary drive represented by a roller-carrier tray of different length. According to the invention, the agitator in accordance with the main patent is characterised by a weighing device using springs 13 and right-angle bracket 14. These springs are connected by a movable right-angle bracket 15 which supports the lid 28 supporting the agitator. The weighing device is associated with an abstracting cutting member operating by virtue of a rod 21 which bears on an adjusting wedge 20 and triggers a lever 22 which releases a plunger 23 comprising the stud 30 responsible for clamping the abstracting tubing 32. The adjusting wedge 20 provides the target value by modifying the distance between the latter and the lever 22. The invention can be employed for automatic abstraction of blood in pouches and for continuous agitation of liquids while being abstracted.

Description

The present invention relates to improvements made to French patent n081 04918 for blood shaker on behalf of the applicant.

The main patent relates more specifically to a blood agitator in bags characterized mainly by a mechanic driving a pocket-carrying tray in a sinuso # dal movement.

According to a provision of this patent resulting in particular from claims 7 and 8. The pocket-carrying tray cooperates with three roller-carrying arms of different length imparting to the tray its sinusoidal movement as and when it is rotated, this tray being retained by a flexible axis tilting in all directions to follow the kinematics of the platform.

Although this set is entirely satisfactory from a functional point of view, it has been found useful to control the weight of blood withdrawn with agitation so as not to exceed a certain withdrawal rate of the order of 350 g for individuals under 60 K and 450 grs for individuals over 60 K.

The invention, therefore, has for its object an apparatus of the kind duri in the main patent, but presenting an incorporated weighing device, which, associated with a cut-off device automatically stops the sampling when the target weight is reached.

To this end, the device according to the main patent and equipped with a weighing device characterized in that it comprises a system of leaf springs 13, mounted in parallelogram on brackets 14 and 15, the bracket 14 of which is fixed. on the housing 27, the bracket 15 ensuring the connection with the cover 28 integral with the housing 12 constitutes the mobile element of the weighing, acting on the rod 21 by means of the adjustment shim 20,
The spring 17 being connected to the bracket 16 fixed on the housing 27 ensures the taring of the weighing with the bracket 15, a movable element of the weighing mechanism.

According to a provision of the invention, the agitator is cut off from any electrical supply by means of the cam 18 raising the bracket 15, blocking the agitator in the Stop position and tripping the contact 19 of the energy source.

In the On position, the parallelogram is released thanks to the lever 18, switching the contact 19 for starting the stirrer.

When the set weight is reached, the parallelogram has collapsed carrying with it the cover 28 and the housing 12, thus the rod 21 being supported on the wedge 20, triggers the lever 22 which releases the piston 23, the l 'pin 30 pinches the sampling tube in the tunnel of the housing.

This stops the sampling, without stopping the agitator, because the latter is controlled by raising the cam 18 which triggers the contact 19.

Another novelty of the system consists in the fact that the piston 23 has at one end a cam 31 which triggers the contact 25, thus lighting the indicator light 26 indicating the end of sampling #
The resetting of the piston 23 extinguishes the indicator 26, frees the sampling tubing, the agitator is ready for a new sampling.

Other characteristics and advantages will become apparent on reading the detailed description which follows, of an embodiment given here by way of example and shown in the attached figure showing, in perspective, the constituent elements of 1 'device.

Claims (3)

CLAIMS 10 Blood agitator, in particular according to claims I, of the main patent characterized in that the pocket-carrying tray and the box containing the drive mechanism is associated with a weighing device, adjusted to a set value, this device cooperating with a mechanism ensuring the automatic # cut off of the blood sample when the set value is reached. 20 Blood shaker according to claim I characterized in that the weighing device is constituted by two leaf springs I3 and a fixed square I4 as well as a mobile square I5 which supports the shaker. 30 Blood agitator according to claims I and 2 in that the mechanism ensuring the automatic cut off of the sample is formed by a rod which presses on an adjusting shim 20 and triggers a lever 22 as the springs 13 are reworked .  40 Blood shaker comprising an indicator light for the end of sampling is lit thanks to a cam secured to the piston 23 responsible for stopping the sampling thanks to its lug 30 50 Blood shaker equipped with a weighing neutralization button where weighing and switch for switching on the pocket tray. According to claims I and 2, the spring system 13 can be locked using a button I8 which raises the spring assembly, bracket, housing. This action of the lever 18 has the effect of tripping the contact I9 energy source of the stirring motor 3.