Patent ID: 8585379
Filing Date: 2013-11-19
Classification: F04B

Abstract:
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.