Peristaltic pump

Abstract

A peristaltic pump (1) with a rotating squeeze roller carrier (12), a squeeze hose (14) partly looping around the squeeze rollers (13) and a curved contact wall (19) for the squeeze hose (14), the contact wall (19) being opposite to the effective surface of the squeeze rollers, whereby the contact wall (19) is movable by way of a setting lever (5) from a setting (FIG. 5), which enables fitting with the squeeze hose (14), to a work setting (FIG. 6), pressing the squeeze hose (14) against the squeeze rollers (13) and whereby the contact wall (19) forms a part of a pump housing cover (6) at which the setting lever (5) is positioned to be outwardly pivotable for displacement of the cover (6).

Description

FIELD OF INVENTION [0001] The invention relates to a peristaltic pump, in particular for use in dishwashers for the metering of a liquid or pasty cleaning agent, with a rotating squeeze roller carrier, a squeeze hose partly looping round the squeeze rollers and a curved contact wall, which is disposed opposite the effective surface of the squeeze rollers, for the squeeze hose. BACKGROUND OF INVENTION [0002] In one metering pump used by the applicant the squeeze hose is laid in a block-shaped pump body, which has a substantially semicircular edge wall, around spring-mounted squeeze rollers on a squeeze roller carrier, wherein after assembly a cover is screw-connected over this configuration, one of the counter-bearings of the squeeze roller carrier being provided in the cover. In that case it is also known to provide the squeeze hose bend, which is positioned in the pump, with coupling and detent heads which are fixed in the region of the housing outer wall in order to then connect t...

AI Technical Summary

Benefits of technology

[0008] Because of the design of the contact wall movable by way of a pivot lever an extremely simple squeeze hose positioning is possible. The pivot lever is opened, wherein the contact wall is removed from the hose, the hose can be removed or exchanged, the pivot lever is closed and the contact wall and all other pump elements are disposed in the working position. At the same time it is achieved by this design that on closing the pump housing cover the contact wall, which is integrally formed therewith, is simultaneously displaced into the working position.

[0011] It can be advantageous if an end wall with a detent tongue as well as with two substantially U-shaped recesses for passage of the squeeze hose is provided at the housing base, wherein in a further embodiment it can be provided that the setting lever is constructed as a yoke with counter-detent for detenting at the detent tongue in the housing closed setting. In that case it is possible to provide with the same detent element a carrier not only for the squeeze hose bend, but also for the setting lever or setting yoke.

Problems solved by technology

It has proved that the known designs of peristaltic pumps are still comparatively costly, wherein in the case of the first solution the exchange, which is necessary from time to time, of the squeeze hose bend is possible only by screwing on the cover, whereas in the case of the solution provided with the pivot cover a disadvantage arises, in particular, in the susceptibility of the cover to breakage and thus loss of the functional capability of the pump.

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