DE2412197C2 - Laboratory stirrer for liquids - Google Patents

Description

The invention relates to a laboratory stirrer for liquids, consisting of a groove one End into a vessel containing the liquid, rotatably mounted in a sleeve connected to the vessel, on mrem from the vessel outstanding end with an affiliate

Shaft on which protruding into the liquid End wing-like fittings with emem nut the m the vessel protruding end of the shaft are detachably connectable connecting piece connected.

From US Pat. No. 3,559,962 a device for stirring liquids is known nut a connection piece with wing-like fittings which can be connected to the shaft by screws. This known device is used to swirl liquids deposited in large vessels such as barrels or the like. For laboratory purposes, this known device is, however, because of their size and their unwieldy for this purpose Ausfuhrungs ^fO miS ^C wÄkannte device for stirring liquids is ι from the German * Offenlegungsschrift 20 36 611.. A stirring wing can be screwed onto the agitator shaft of this known device as a connecting piece. This known device, which is used in particular to stir liquids in wood or plastic chests, wood fibers or equipment tanks and which can be plugged into and connected to the opening of such vessels, is also unsuitable for laboratory purposes. A device for stirring liquids in an embodiment suitable for laboratory purposes is known from German Offenlegungsschrift 22 00 685. In this known laboratory stirrer, the end of the shaft protruding into the vessel is flattened.One or two fittings are pivotably mounted in an axis directed transversely through the flattening * ^ _that when cleaning there is a risk of individual parts being lost or misplaced

^we ^ ⁿ _{a wide} ren known embodiment ¹ ^ _L aborrührers is the zoom in which liquid * £ * £ ^ _{WeUe as a fork} formed of m

Fitting is mounted in an eccentrically rotatable through the fork halves. J _{101 the} shaft into a vessel with a narrow g ^ fitting in the direction of the axis of the

^{"A 's} J" ™ _üappt and takes until the vessel a wave coll w ^ ^^ ^ _{WEU em Here}

Location ^seni £ _{fa mdst mcnt} the exact horizontal ricnt »^ _R .. _{if imbalances} occur, what

^ '! ° _{jti m} wear of the shaft and that of the

leads to Y ° "^e; ^u f _ühru serving sleeve. Add to WeUe alsj- s ^ _da ^ _R ^ _f _

« ^Fl Hiehkraft be very robust trained to occur in ^ ^ ^ _{also only germg (} ,

^ Jf w imbalances in amplified

^ ^ _{NachteU this well.}

e aume ^ en. ^^ ^^ _{that's difficult}

^^ Jgn is especially sensitive to the fork Too and pressure is. . ......

Another disadvantage of the known laboratory stirrers for STSn is that they are not used in vessels.

30 den

35 lung de ^ r sert> ar

40 ^^ fSefSe

_{different, well-} fitted shafts must also be used.

_Erfindu ng it is a laboratory stirrer _clam Jfen whose the Verwirbe _{ienende part easily SEL} i ^ ech ^ _is

f ^UI _{& xl & aäem} , without it having _to be, an different

"g" _{emem laboratory} stirrer of the J ^^ _invention daemgangs ^ bjeichneten J ^ _{made of plastic}

by gdost that the Ans ^ ^ ^^ ^

exists.and ™ "" «* ^: is provided, whose flat

^B ° ^to _m ^"n _{a nd} ^{e D} _e ^ _n ah inwardly projecting Ringwnlst open rim em inward _f ^ _n

S ^^ Sjcmalrippe receiving

^ X ^^ S that the connector in this way reaches win1 ^ _and ^ ^

^simple _A ^ ^r . ^ _r ^S l _n \ a _nn "Pond comfort when fortified

ser lost we jja ^ iff ^ dto a firm fit "des

of the final stage: M1 is guaranteed.

Connection pieces anider ^ "» different

As a result ^ d ^ ^An f ⁰ J ¹ ^ r laboratory stirrers can be used for a long time κ α _ω _

J ^ S3S7 that AnschloB-pj ^ jj ^ ^^^ _fittings

Stucke ™ * Jf ^ fS ^ we can be easily and quickly ^ ™ ^^ ⁵ " _{ω of the invention is} enough that the ^la » ^o ™ ^r | ^em _{is thus e} ° different Btadmj «gercm ^

example ^s ^ ^ei ^. ° ^h ^ ^e S has changed, or if

^ "^ Sfffiw Jtae ^ Sdgteit other Visin the £ ^ ™ £ ^ f ] ^ J _{S such} an

STÄ. ώ- ^ whose «, -,

like fittings is adapted to the respective viscosity of the liquid In addition, the connection piece very light because of its simple design, especially because it is made of plastic to clean, since the wing-like fittings do not need to be detached from the connector, there is also no risk of individual parts losing their valuables when cleaning.

It is also advantageous that the shaft has only one at its end facing the connector needs to have annular and a diagonal groove arranged on the end face of the shaft. the Machining of the shaft required to accommodate the connector is thus minimal. So that in the end of the shaft protruding into the vessel has a sufficiently high stability, it expediently has one that differs only slightly from the diameter of the part of the shaft guided in the sleeve Durchmeoser on.

Embodiments of the laboratory stirrer according to the invention are shown in the drawing and will be described in more detail below. Show it

F i g. 1 to 3 the end of the shaft facing the connecting piece with different embodiments of the connector.

As can be seen from the drawing, the connector 1 is provided with a blind hole whose The diameter corresponds to the diameter of the shaft 2. The flat bottom of the blind hole has a Diagonal rib 3 and an inwardly protruding annular bead on its open edge. How out F i g. 1 can be seen, is at the free end of the shaft 2 on the front side for receiving the diagonal rib 3 of the connection piece 1 a diagonal groove 4 and an annular groove are provided in which the at the edge of the blind hole attached ring bead engages. The connector shown in Fig. 1 has a a wing existing molding 6 on.

In Fig. 2, a connector 1 is shown, on the wing-like fittings S by a perpendicular to Axis of the - in F i g. 2, not shown - shaft-directed axis are pivotably arranged.

In Fig. 3 shows a connection piece 1 with two firmly attached wing-like fitting pieces 7.

1 sheet of drawings

Claims (1)

Claim: Laboratory stirrer for liquids, consisting of one with one end into the liquid ent- * holding vessel protruding, in one with the Vessel connected to the sleeve rotatably mounted, at its end protruding from the vessel with a drive connected WeUe, on which m the liquid protruding end Üugelaruge Fittings with one, with the one protruding into the vessel End of the shaft releasably connectable connecting piece are connected, characterized in that that the connection piece (1) is made of plastic and has a sack bung is provided with a corresponding diameter, the flat bottom of which has a diagonal rib (3) and an inwardly protruding annular bead at its open edge is, and that on the WdIe (2) on your ao free end on the front side a diagonal button receiving diagonal groove (4) and at an axial distance one holding the annular bead locked Annular groove are provided.