Peristaltic pump that is resistant to torques and vibrations
First Claim
1. A peristaltic pump for dispensing liquid, comprising:
- a front casing portion;
a rear casing portion snap-fitted together with the front casing portion, the front casing portion having a plurality of first snap-fit portions spaced apart from each other and the rear casing portion having a plurality of second snap-fit portions spaced apart from each other, each one of the first snap-fit portions being snap-fitted with a corresponding one of the second snap-fit portions;
at least three different types of securing devices for securing and snap-fitting the front casing portion with the rear casing portion, each device positioned at a different location on the front casing portion the rear casing portion;
wherein one of the at least three different types of securing devices comprises a boss on the front casing portion, the boss having a first cylindrical portion with a first diameter and an adjacent second cylindrical portion with a second diameter smaller than the first diameter, a first hole on the rear casing portion and a second hole in a motor flange;
wherein the first diameter of the first cylindrical portion is substantially the same as the diameter of the first hole;
wherein the second diameter of the second cylindrical portion is substantially the same as the second hole;
wherein the boss is inserted through the first hole into the second hole;
a rotor confined between the front casing portion and the rear casing portion and rotatable around an axis, the rotor having a triangular-shaped front face having three tips and a triangular-shaped rear face having three tips, each tip of the three tips of the front face aligned with a corresponding tip of the rear face, the rotor having three rollers with one roller each mounted at each of the three aligned front and rear face tips; and
a flexible tube having a portion housed within the front casing portion and the rear casing portion and compressed therein by the rollers;
wherein the peristaltic pump is resistant to torques and vibrations.
1 Assignment
0 Petitions
Accused Products
Abstract
A peristaltic pump for dispensing liquid includes a front casing portion, a rear casing snap-fitted together with the front casing portion, a rotor confined between the front casing portion and the rear casing portion, a plurality of rollers mounted in the rotor, and a flexible tube compressed at equally spaced intervals by the plurality of rollers. The pump is resistant to constant torques and vibrations caused by a machine to which it is attached so that the pump does not become loose and fall apart. In a first embodiment for low torque and low vibration operations, the pump is screwless. In a second embodiment for high torque and high vibration operations, two screws secure a synchronous gear motor to the pump.
39 Citations
20 Claims
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1. A peristaltic pump for dispensing liquid, comprising:
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a front casing portion; a rear casing portion snap-fitted together with the front casing portion, the front casing portion having a plurality of first snap-fit portions spaced apart from each other and the rear casing portion having a plurality of second snap-fit portions spaced apart from each other, each one of the first snap-fit portions being snap-fitted with a corresponding one of the second snap-fit portions; at least three different types of securing devices for securing and snap-fitting the front casing portion with the rear casing portion, each device positioned at a different location on the front casing portion the rear casing portion; wherein one of the at least three different types of securing devices comprises a boss on the front casing portion, the boss having a first cylindrical portion with a first diameter and an adjacent second cylindrical portion with a second diameter smaller than the first diameter, a first hole on the rear casing portion and a second hole in a motor flange; wherein the first diameter of the first cylindrical portion is substantially the same as the diameter of the first hole; wherein the second diameter of the second cylindrical portion is substantially the same as the second hole; wherein the boss is inserted through the first hole into the second hole; a rotor confined between the front casing portion and the rear casing portion and rotatable around an axis, the rotor having a triangular-shaped front face having three tips and a triangular-shaped rear face having three tips, each tip of the three tips of the front face aligned with a corresponding tip of the rear face, the rotor having three rollers with one roller each mounted at each of the three aligned front and rear face tips; and a flexible tube having a portion housed within the front casing portion and the rear casing portion and compressed therein by the rollers; wherein the peristaltic pump is resistant to torques and vibrations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A screw-less peristaltic pump assembly for dispensing liquid, comprising:
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a front casing portion; a rear casing portion having a first hole; a gear motor with a flange having a second hole; a plurality of different types of devices for securing and snap-fitting the front casing portion and the rear casing portion together without screws, the devices including; a pair of bosses, the bosses having a first cylindrical portion with a first diameter and an adjacent second cylindrical portion with a second diameter smaller than the first diameter; wherein the first diameter of the first cylindrical portion is substantially the same as the diameter of the first hole in the rear casing portion; wherein the second diameter of the second cylindrical portion is substantially the same as the second hole in the flange; wherein the boss is inserted through the first hole into the second hole; a pair of open-ended boxes and spring clip pairs configured to snap-fit together the front casing portion and the rear casing portion; and
,a recess and a mating groove configured to snap-fit together the front casing portion and the rear casing portion; a rotor confined between the front casing portion and the rear casing portion; a plurality of rollers mounted in the rotor; and a flexible tube compressed at equally spaced intervals by the plurality of rollers; wherein the pump assembly is resistant to torques and vibrations. - View Dependent Claims (18, 19)
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20. A screw-less peristaltic pump assembly for dispensing liquid, comprising:
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a front casing portion; a rear casing portion; a plurality of different snap-fitting devices for securing and snap-fitting the front casing portion and the rear casing portion together without screws, the devices including; a boss, the boss having a first cylindrical portion with a first diameter and an adjacent second cylindrical portion with a second diameter smaller than the first diameter, a first sleeve in the rear casing portion, and a second sleeve in a motor flange, wherein the first diameter of the first cylindrical portion is substantially the same as the diameter of the first sleeve in the rear casing portion; wherein the second diameter of the second cylindrical portion is substantially the same as the second sleeve in the motor flange; wherein the boss is inserted through the first sleeve into the second sleeve and heat welded together; a pair of open-ended boxes and spring clip pairs configured to snap-fit together the front casing portion and the rear casing portion; and
,a C-shaped groove in a circular recess and a c-shaped tongue configured to form a seal between the front casing portion and the rear casing portion; a rotor confined between the front casing portion and the rear casing portion, the rotor including reinforcing supports; a plurality of rollers mounted in the rotor; and a flexible tube compressed at equally spaced intervals by the plurality of rollers;
wherein the pump assembly is resistant to torques and vibrations.
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Specification