Pump assembly
First Claim
1. A pump assembly comprisinga pump, said pump having a piston therein,a programmable memory for storing a preselected amplitude, frequency and wave-shape variable fluid pumping characteristic,means for reading out the fluid pumping program stored in said memory,means for controlling the displacement of said piston in said pump to provide a fluid pumping characteristic in accordance with said stored program,means for comparing the position of said pump piston with the position thereof established by said stored program, andmeans responsive to said comparing means for controlling said pump piston to correct any deviation of the piston position from the position established by said stored program.
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Abstract
A pump assembly is disclosed which includes a pump which is externally controlled to vary with time the volume and/or the pressure of fluid pumped therethrough. A memory unit is programmed to provide a desired volume-time and/or pressure-time characteristic. The output of the memory is utilized to drive the pump to provide the aforementioned pump characteristics. Provision is made for appropriately modifying the stored program in accordance with preselected parameters so that the pump can, for example, operate in conjunction with an artificial heart.
218 Citations
18 Claims
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1. A pump assembly comprising
a pump, said pump having a piston therein, a programmable memory for storing a preselected amplitude, frequency and wave-shape variable fluid pumping characteristic, means for reading out the fluid pumping program stored in said memory, means for controlling the displacement of said piston in said pump to provide a fluid pumping characteristic in accordance with said stored program, means for comparing the position of said pump piston with the position thereof established by said stored program, and means responsive to said comparing means for controlling said pump piston to correct any deviation of the piston position from the position established by said stored program.
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15. The pump assembly of claim 20 wherein said program controls the volume of said fluid pumped with respect to time.
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16. The pump assembly of claim 20 wherein said program controls the pressure of said fluid pumped with respect to time.
Specification