TWO-STAGE LINEAR PERISTALTIC PUMP MECHANISM
First Claim
1. A peristaltic pump having a piece of tubing in a fluid communication with a reservoir containing a fluid, the peristaltic pump comprising a two-stages linear peristaltic pump mechanisms, wherein one stage linear peristaltic pump mechanism ensures a crushed area of the tubing on which the other stage pump mechanism operate to return to its original cross sectional area and to provide a consistent flow rate of the fluid.
1 Assignment
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Accused Products
Abstract
This invention discloses a peristaltic pump composed of a two-stage linear peristaltic pump mechanism, which engages in different functions, charging and pumping a fluid to a patient. This peristaltic pump is capable of restoring the crushed tubing, caused by repeated compression or crushing of the tubing by peristaltic fingers, to its original circular cross sectional area so that it can provide a precise flow rate. The two-stage linear peristaltic pump mechanism substantially improves the consistency of a flow rate over time and extends the usefulness of peristaltic pumps to applications where they could not otherwise be used.
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Citations
35 Claims
- 1. A peristaltic pump having a piece of tubing in a fluid communication with a reservoir containing a fluid, the peristaltic pump comprising a two-stages linear peristaltic pump mechanisms, wherein one stage linear peristaltic pump mechanism ensures a crushed area of the tubing on which the other stage pump mechanism operate to return to its original cross sectional area and to provide a consistent flow rate of the fluid.
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27. A peristaltic pump having a piece of tubing in a fluid communication with a reservoir containing a fluid, and a two-stage linear peristaltic pump mechanism—
- a charging mechanism and a pumping mechanism—
to ensure a crushed area of the tubing to return to its original cross sectional area, the peristaltic pump comprising a two-stage pumping mechanism program to operate the two-stage linear peristaltic pump mechanism. - View Dependent Claims (28, 29, 30)
- a charging mechanism and a pumping mechanism—
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31. A method of ensuring a crushed area of a piece of tubing in a fluid communication with reservoir containing a fluid, on which a peristaltic pump presses, to return to its original cross sectional area and to provide equal volume of the fluid in each pumping cycle comprising
(a) providing the peristaltic pump comprising two separately controlled pumping stages, a charging mechanism and a pumping mechanism, successively along the upstream portion of the tubing— - a charging section of the tubing and the downstream portion of the tubing—
a pumping section of the tubing;(b) operating the charging mechanism on the charging section of the tubing to fill the pumping section of the tubing with the fluid when the pumping mechanism is not operating; and (c) operating the pumping mechanism on the pumping section of the tubing to move the fluid further along when the charging mechanism is not operating. - View Dependent Claims (32, 33, 34, 35)
- a charging section of the tubing and the downstream portion of the tubing—
Specification