Peristaltic pump
First Claim
1. A peristaltic pump for pumping fluid in a plurality of cycles where each cycle has at least first and second stages, the peristaltic pump comprising:
- a plunger configured to move toward and away from a tube;
an inlet valve upstream of the plunger;
an outlet valve downstream of the plunger;
a spring configured to bias the plunger toward the tube; and
an actuator configured to mechanically engage and disengage from the plunger,wherein;
in the first stage, the inlet valve is opened and the plunger is moved away from the tube by the actuator,in the second stage, the inlet valve is closed, the plunger is moved toward the tube by the spring, and the actuator is mechanically disengaged from the plunger;
and further wherein,the actuator allows the plunger to move toward the tube under the spring bias to discharge fluid downstream past the outlet valve.
4 Assignments
0 Petitions
Accused Products
Abstract
A peristaltic pump having at least first, second, and third stages is provided. The peristaltic pump includes a plunger, inlet and outlet valves, a spring, and an actuator. The plunger actuates toward and away from a tube, the inlet valve is upstream of the plunger, the outlet valve is downstream of the plunger, the spring biases the plunger toward the tube, and the actuator mechanically engages and disengages from the plunger. In the first stage, the inlet valve is opened and the plunger is actuated from the tube, in the second stage, the inlet valve is closed, the plunger is actuated toward the tube, and the actuator is mechanically disengaged from the plunger, and in the third stage, the outlet valve is opened. In the third stage or in a fourth stage, the actuator actuates the plunger toward the tube to discharge fluid downstream past the outlet valve.
376 Citations
29 Claims
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1. A peristaltic pump for pumping fluid in a plurality of cycles where each cycle has at least first and second stages, the peristaltic pump comprising:
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a plunger configured to move toward and away from a tube; an inlet valve upstream of the plunger; an outlet valve downstream of the plunger; a spring configured to bias the plunger toward the tube; and an actuator configured to mechanically engage and disengage from the plunger, wherein; in the first stage, the inlet valve is opened and the plunger is moved away from the tube by the actuator, in the second stage, the inlet valve is closed, the plunger is moved toward the tube by the spring, and the actuator is mechanically disengaged from the plunger; and further wherein, the actuator allows the plunger to move toward the tube under the spring bias to discharge fluid downstream past the outlet valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification