B. Braun Melsungen Ag

Reinhard Knuth

Rolf Heitmeier

Dieter Rath

Hans-Josef Gerlach

Bodo Schacht

Wolfgang Mosebach

Ronald Lutz

Fredrich Von Der Haar

Dieter Herwig

The hose pump comprises an eccentric drive with numerous eccentric discs () fastened to a shaft (). Each eccentric disc () drives a crank drive () having a connecting rod (). At the end of the connecting rod (), a pump finger () is borne for compressing a pump hose (). A sealing diaphragm () is disposed between the eccentric drive and the pump hose () for preventing liquid from intruding into the interior of the housing (). The connecting rod () sealingly passes through the sealing diaphragm (). The sealing diaphragm () comprises lateral folds () so that it does not exert any substantial forces upon the crank drive (). The hose pump has a low power consumption and permits a small structure.

Peristaltic hose pump

An infusion pump has a housing () accommodating a pump finger mechanism (). The pump finger mechanism () acts on a pump hose () fastened at holders () of the housing. The pump hose () is supported by a door (). In order to facilitate proper and positionally correct placement of the pump hose, one of the holders () includes an oblique pin. The associated transition piece () of the pump hose () has a hole () with the same inclination angle as the oblique pin. The other transition piece () is of a different structure so that the transition pieces cannot be mixed up. A longitudinal color strip () on the pump hose is provided to visually indicate any twisting of the hose.

Tube coupling for a peristaltic pump

A pump hose for a peristaltic pump has a suction-side end and a pressure-side end. Each end is provided with a bushing integrally connected thereto and adapted for suspending attachment to the peristaltic pump by holding members. Each bushing holds a suspension device having two side plates directed to opposite sides in symmetry with the longitudinal axis of the hose and each side plate is formed with an eyelet therein. The eyelets in the side plates on the suction-side end of the hose have a different form and/or size than the eyelets in the side plates on the pressure-side end of the hose. The eyelets are adapted for mounting on fitted holding pins of the pump. The hose can be easily mounted in the pump while conforming to the correct flow direction with respect to the suction side and the pressure side of the pump, and the pump hose offers uniform conveying characteristics.

Pump hose for a peristaltic pump

A pump hose for a peristaltic pump consists of two arcuate portions that merge along kink lines so that the undeformed hose lumen has the cross-sectional shape of a convex lens. The joinings of the arcuate portions are joined by outwardly extending ribs. When the hose is pressed, only minor squeezing occurs at the joinings. The hose has a considerably improved squeezing and restoring behavior. The ribs prevent an excessive squeezing.

A medical pump device having a hose pump and a replaceable pump hose and provided with a reading means that reads a code mounted on the pump hose. The code corresponds to the deviation of the delivery volume of the individual hose from the set delivery volume. In dependence on the coding signals, the control signals for the pump drive are corrected so that defined delivery rates are obtained even with in wide hose tolerances.

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Melsungen, Germany

Reinhard Knuth