Mechanical liquid pump

Abstract

A mechanically operated liquid pump for medical and nutrient liquids, as well as for liquids used in biological and laboratory applications, has an integrated, self-contained pump construction comprising a housing having an expandable elastic member mounted wholly within the housing and shaped to store and dispense a liquid therefrom. Inlet and outlet members are also mounted within the housing, are operably connected with the elastic member inside the housing, and regulate the flow of liquid traveling into and out of the pump. A flow regulator is also mounted wholly within the housing, communicates with at least one of the inlet and outlet members, and maintains a substantially constant volumetric flow of liquid dispensed from the elastic member.

Description

FIELD OF THE INVENTION[0001]The invention relates to a mechanically operated liquid pump, particularly for medical or nutrient liquids, and for liquids in the biological and laboratory sector.BACKGROUND OF THE INVENTION[0002]Many different types of liquid pumps are used for delivering medical, nutrient or biological liquids, or liquids in the laboratory sector. For example, pumps are known that are operated by electric energy, electrochemically, by gas, mechanically, electromechanically, and by physical mechanics. Many of these pumps can generally only be used after quite a long start-up time and often provide the user and consumer with insufficient dosing precision. The known pump systems are also very expensive and are not very satisfactory from the environmental point of view. They often cannot be used portably by the user.[0003]Mechanically operated liquid pumps are characterized by a drive mechanism, which can generally be of quite simple configuration. Thus, various designs ha...

AI Technical Summary

Benefits of technology

[0016]It will therefore be appreciated that the liquid pump is simple to operate. Incorrect operation is ruled out, and, in the case of the pump being used in the field of medicine, all that has to be done is to connect the patient. By virtue of the configuration of the liquid pump according to the invention, with the functional parts mounted inside the housing, it is possible for the pump to have a small and compact design.

[0025]The individual parts of the housing are preferably made of plastic. This allows the parts to be produced in virtually any desired shape, inexpensively and with low weight. Parts are connected to one another in particular by laser welding.

[0028]The mechanically operated liquid pump according to the invention thus integrates all the functional parts needed for perfect functioning of the liquid pump and is therefore advantageous in the following respects:

Problems solved by technology

Many of these pumps can generally only be used after quite a long start-up time and often provide the user and consumer with insufficient dosing precision.

The known pump systems are also very expensive and are not very satisfactory from the environmental point of view.

They often cannot be used portably by the user.

This means that they have to be combined with other required functional parts.

This means complicated handling, especially if medical or nutrient liquids are to be administered, and, in addition, there is considerable danger of the functional parts being mixed up or incorrectly connected.

There is therefore a considerable danger of incorrect operation of a system made up of individual functional parts and intended to function as a mechanically operated liquid pump.

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