Peristaltic pump arrangement and pump rollers
First Claim
1. A peristaltic pump for use with tubing, the pump comprising:
- a raceway;
a rotatably mounted rotor;
a passageway formed between the raceway and the rotor, the passageway being adapted to receive said tubing;
a plurality of roller assemblies pivotably and eccentrically mounted to the rotor, each roller assembly having a length, and including a roller having an outer surface disposed to selectively roll along said tubing when received in the passageway; and
at least one compliance mechanism coupled to each roller assembly, the compliance mechanism having first and second ends coupled to the rotor and the roller assembly, respectively, the compliance mechanism being adapted and disposed to bias the associated roller assembly outward relative to the rotor;
wherein substantially the majority of the compliance mechanism is contained within the length of the roller assembly and within inside of the roller.
1 Assignment
0 Petitions
Accused Products
Abstract
A peristaltic pump for use with tubing. The pump includes a raceway and a rotatably mounted rotor that form a passageway therebetween for the tubing. A plurality of roller assemblies is pivotably and eccentrically mounted to the rotor. Each roller assembly has a length, and includes a roller having an outer surface disposed to selectively roll along said tubing when received in the passageway. At least one compliance mechanism is coupled to and contained substantially within the length of each roller assembly. The compliance mechanism has first and second ends coupled to the rotor and the roller assembly, respectively. The compliance mechanism is adapted and disposed to bias the associated roller assembly outward relative to the rotor, such that a force applied to the roller assembly pivoting the roller assembly inward against the force of the compliance mechanism.
32 Citations
20 Claims
-
1. A peristaltic pump for use with tubing, the pump comprising:
-
a raceway; a rotatably mounted rotor; a passageway formed between the raceway and the rotor, the passageway being adapted to receive said tubing; a plurality of roller assemblies pivotably and eccentrically mounted to the rotor, each roller assembly having a length, and including a roller having an outer surface disposed to selectively roll along said tubing when received in the passageway; and at least one compliance mechanism coupled to each roller assembly, the compliance mechanism having first and second ends coupled to the rotor and the roller assembly, respectively, the compliance mechanism being adapted and disposed to bias the associated roller assembly outward relative to the rotor; wherein substantially the majority of the compliance mechanism is contained within the length of the roller assembly and within inside of the roller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A biased roller assembly for coupling to a peristaltic pump for use with tubing, the roller assembly comprising:
-
a length; a substantially cylindrical roller having an interior; a shaft having an outer annular surface, opposing shaft ends, and a central axis, the roller being rotatably disposed about said shaft, at least one of the shaft ends including at least one recess for receiving at least one post element defining a pivot axis, the pivot axis extending substantially parallel to, but not coaxially with, the central axis, the shaft being adapted to be coupled to the pump along said pivot axis; and at least one compliance mechanism having first and second ends, the first end being coupled to the at least one of the shaft ends, the second end being disposed to be coupled to the pump, the compliance mechanism being adapted to bias the shaft when mounted to the pump; wherein substantially the majority of the compliance mechanism is contained inside of the roller assembly. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A dialysis machine including a peristaltic pump for use with tubing, the pump comprising:
-
a raceway; a rotatably mounted rotor; a passageway formed between the raceway and the rotor, the passageway being adapted to receive said tubing; a plurality of roller assemblies pivotably mounted to the rotor, at least one of the roller assemblies having a length, a substantially cylindrical roller having an interior, and an outer surface disposed to selectively roll along said tubing when received in the passageway, a shaft, the roller being mounted to rotate about the shaft, the shaft being mounted to eccentrically pivot about a pivot axis, the pivot axis being fixed relative to the shaft and the rotor; and at least one compliance mechanism coupled to the at least one roller assembly, the compliance mechanism including at least one torsion spring having first and second ends coupled to the rotor and the roller assembly, respectively, the compliance mechanism being adapted and disposed to bias the associated roller assembly outward relative to the rotor, a force applied to the roller assembly pivoting the roller assembly inward against the force of the compliance mechanism, wherein the compliance mechanism is contained at least partially inside of the roller. - View Dependent Claims (20)
-
Specification