F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/30, 128/81
F04B 43/12 (2006.01) A61M 5/142 (2006.01) A61M 5/168 (2006.01) F04B 43/09 (2006.01)
Patent
CA 1149672
ABSTRACT OF THE DISCLOSURE A fluid pump device for use in conjunction with a tubular pumping chamber which is composed of an elastic mate- rial and which has a pair of spaced-apart unidirectional valves through which fluid can be passed with cyclic compression and expansion of the chamber. The pump device is suitable for use in medical and veterinary application and it comprises spaced- apart clamp elements between which the pumping chamber can be removably located, a spring device for biasing the clamp elements in a direction toward one another, an electrically actuated solenoid device for effecting relative movement of the clamp elements in a direction away from one another where- by cyclic changes in the contained volume of the pumping chamber are induced by the clamp elements with periodic energisation and de-energisation of the solenoid device, and electrical circuitry associated with the solenoid device for energising same at a suitable repetition rate. The pump device is characterised by the provision of means for timing the period of closing movement of the clamp elements follow- ing de-energisation of the solenoid device and for providing fault indicating signals if the timed period is less than or greater than predetermined time intervals, whereby indication may be provided as to the existence of an air bubble or a blockage in a fluid feed line associated with the pumping chamber.
351157
Sherman
Wellcome Australia Limited
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