Peristaltic pump
First Claim
1. A peristaltic pump comprisinga rotor rotatably mounted about a rotor axis and carrying rotor rollers that travel in a circular path,a race with an internal surface for supporting a flexible tube in a tube pumping region between it and said circular path, said surface including points that are at equal radii from said rotor axis in planes perpendicular to said rotor axis,a cover mounted on said race for movement in a direction parallel to said rotor axis between a loading position spaced from said race sufficiently to permit insertion of said tube through a tube insertion opening into a tube mounting position adjacent to said tube pumping region and an operational position in which said tube insertion opening is closed, anda lifter to move said tube in a direction parallel to said rotor axis and away from said rotor rollers as said cover is moved from said operational position to said loading position.
7 Assignments
0 Petitions
Accused Products
Abstract
A peristaltic pump comprising a race having an internal surface for supporting a flexible tube in a tube pumping region, and a rotor rotatably mounted about a rotor axis and carrying rollers that travel in a circular path adjacent to the tube pumping region, the rollers having a large diameter central portion between smaller diameter portions to cause the tube to be self-aligning at the central portion. Also disclosed are a cover mounted on the race for movement in a direction parallel to the rotation axis between a loading position spaced from the race sufficiently to permit insertion of the tube through a tube insertion opening into a tube mounting region and an operational position in which the tube insertion opening is closed; and self-loading a tube into a peristaltic pump via rollers having a small diameter end portion and an adjacent larger diameter portion.
106 Citations
16 Claims
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1. A peristaltic pump comprising
a rotor rotatably mounted about a rotor axis and carrying rotor rollers that travel in a circular path, a race with an internal surface for supporting a flexible tube in a tube pumping region between it and said circular path, said surface including points that are at equal radii from said rotor axis in planes perpendicular to said rotor axis, a cover mounted on said race for movement in a direction parallel to said rotor axis between a loading position spaced from said race sufficiently to permit insertion of said tube through a tube insertion opening into a tube mounting position adjacent to said tube pumping region and an operational position in which said tube insertion opening is closed, and a lifter to move said tube in a direction parallel to said rotor axis and away from said rotor rollers as said cover is moved from said operational position to said loading position.
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9. A peristaltic pump comprising
a support, a rotor rotatably mounted on said support about a rotor axis and carrying rotor rollers that travel in a circular path, and a race with an internal surface defining a portion of a circle for supporting a removable flexible tube in a tube pumping region between it and said circular path, said surface including points that are at equal radii from said rotor axis in planes that are perpendicular to said rotor axis, said race being fixedly mounted on said support, said internal surface of said race being spaced from said rollers so as to provide a tube mounting region adjacent to said tube pumping region in a direction parallel to said tube rotor axis, there being a sufficiently open region between said tube mounting region and said pumping region to permit travel between the two of said tube, said rollers having a small diameter portion at an end adjacent to said tube mounting region and a large diameter portion adjacent to said small diameter portion to cause said tube to be self-loaded, during rotation of said rotor, from said tube mounting region to said tube pumping region, owing to the action of the difference in radius of the rollers.
Specification