Miniature peristaltic pump

Claim 1

A minature peristaltic pump especially adapted to be carried on the human body for slow and continuous injection of medicinal preparations in the aqueous state, including a pump having a rotor borne on a shaft around which are evenly distributed rollers given a rovolving movement rolling along at least one flexible tube so as to compress it against at least one backing which surrounds said tube over a predetermined length of arc so as to permit the sucking in and the expelling of said medicinal preparation, said shaft being provided with a coupling element, a stepping motor driving a down gearing chain bearing at its end a power take-off, a control circuit for providing the motor with energizing pulses coming from a time base followed by a frequency divider and a power cell, said minature peristaltic pump being characterized in that it comprises a separable pump module and a separable motor module, said modules being adapted to be assembled with, and after assembly separated from, one another, the pump module comprising the pump itself provided with its coupling element and the motor module comprising the stepping motor, the down gearing chain provided with its power take-off, the control circuit, the frequency divider and the power cell, said coupling element being engaged with said power take-off when said modules are assembled and being disengaged when said modules are separated after assembly, whereby said motor module and said pump module can be separated after assembly for purposes including sterilization of said pump module apart from said motor module and coupling of said pump module to another motor module.