초록 ▼

An improved occulsion detection apparatus and method for use in a pumping apparatus wherein a motor control sequencer provides signals adapted to rotate the shaft of a motor and a pump mechanism through a pumping cycle. The motor is advantageouly initially operated at a first higher torque to insure

An improved occulsion detection apparatus and method for use in a pumping apparatus wherein a motor control sequencer provides signals adapted to rotate the shaft of a motor and a pump mechanism through a pumping cycle. The motor is advantageouly initially operated at a first higher torque to insure proper starting of the pumping cycle and is subsequently operated at a second lower torque through the remainder of the pumping cycle, the motor stalling if an occlusion within a fluid delivery system causes the back pressure within the delivery system to exceed the torque capabilities of the motor. An occulsion detector times the pumping cycle and if the cycle exceeds a first predetermined time period, an occulsion alarm is generated. The occlusion detector may further cause the motor control sequencer to increase motor torque to attempt to complete the pumping cycle or may de-energize the motor after a second predetermined period to prevent damage to the pumping apparatus.

대표청구항 ▼

An occlusion detection apparatus for use in a pumping apparatus wherein said pumping apparatus includes a motor for accuating pumping means through a pumping cycle to provide pumping of a fluid through fluid delivery means, comprising first means for energizing the motor to operate the motor at a fi

An occlusion detection apparatus for use in a pumping apparatus wherein said pumping apparatus includes a motor for accuating pumping means through a pumping cycle to provide pumping of a fluid through fluid delivery means, comprising first means for energizing the motor to operate the motor at a first torque for a predetermined time period at the beginning of the pumping cycle and for subsequently operating the motor at a second torque less than the first torque, and second means for determining if the pumping cycle is not completed within a second predetermined time period to thereby indicate an occlusion within the fluid delivery means.