Finger type peristaltic pump comprising a ribbed anvil
Inventors
Assignees
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Publication Number
US-10113543-B2
Publication Date
2018-10-30
Expiration Date
Abstract
The present invention includes a finger-type peristaltic pump with a ribbed anvil. According to some embodiments, a finger type peristaltic pump may comprise a plurality of pressing fingers, an infusion tube and a passive interfacing mechanism. The passive interfacing mechanism may comprise a channel, groove or other suitable mount for placing and mounting an infusion tube such that the pressing fingers are positioned on one side of the tube and the ribbed anvil on the opposite side. The pressing fingers may be positioned to apply an approximately perpendicular force on the tube, pressing it against the ribbed anvil, thus causing a pumping action.
Core Innovation
The invention describes a finger-type peristaltic pump interface configured to be placed in conjunction with a finger-type peristaltic pump including a plurality of fingers. The interface includes a conduit having a compressible segment and a conduit accommodation that receives the conduit and removably mounts the interface to the pump. When mounted on the pump, alternating linear motion of the fingers causes fluid to flow through the conduit by applying a series of compressive forces on the conduit, thereby defining contact points where the fingers contact the conduit.
The interface further includes a ribbed anvil positioned within the interface so as to contact a first surface of the conduit opposite a second surface of the conduit contacted by the fingers. The ribbed anvil has a longitudinal dimension perpendicular to the linear motion of the fingers and includes a first set of protruding ribs positioned directly across from each contact point, with flat surfaces perpendicular to the linear motion. The first set of ribs provides a counterforce to each compressive force produced by the fingers.
A second set of protruding ribs alternates with the ribs of the first set and is positioned to interface with the first surface of the conduit in between the contact points. The second set of ribs is configured to support the conduit when compressed. The described approach uses rib geometry such as rib height, rib width, and rib profile/specifications to accept a range of tube properties/diameters and achieve a predetermined flow capacity by adjusting rib dimensions.
Claims Coverage
The patent includes two independent claims. The claim coverage centers on a removably mounted interface for a finger-type peristaltic pump that uses a compressible conduit segment and a ribbed anvil with alternating rib sets to define contact points, apply counterforce, and support the conduit when compressed. A further distinction in one claim specifies a system that includes the finger-type peristaltic pump itself and pointed ends on the fingers.
Removably mounted conduit interface for finger-type peristaltic pump with alternating linear finger motion
An interface comprising a conduit having a compressible segment positioned within the interface such that, when mounted on the finger-type peristaltic pump, alternating linear motion of the fingers causes fluid to flow through the conduit by applying a series of compressive forces on the conduit, thereby defining contact points where fingers contact the conduit during the alternating linear motion; a conduit accommodation configured to receive the conduit and removably mount the interface to the finger-type peristaltic pump.
Ribbed anvil with first set of protruding ribs providing counterforce at contact points
A ribbed anvil positioned within the interface to contact a first surface of the conduit opposite a second surface contacted by the fingers, the ribbed anvil having a longitudinal dimension perpendicular to the linear motion of the fingers and comprising a first set of protruding ribs positioned directly across from each contact point, each first set rib having a flat surface perpendicular to the linear motion of the fingers configured to provide a counterforce to a compressive force produced by each finger when the interface is mounted to the pump.
Alternating second set of protruding ribs supporting the conduit when compressed
A second set of protruding ribs positioned such that the ribs of the second set alternate with the ribs of the first set and are positioned to interface with the first surface of the conduit in between the contact points, wherein the second set of ribs is configured to support the conduit when compressed.
Finger-type peristaltic pumping system with housings mounting compressible conduit segment and ribbed anvil
A system comprising a finger-type peristaltic pump including a plurality of fingers with elongated body and pointed ends, having a pumping cycle of alternating linear motion of each finger; an interface comprising a housing configured to removably mount to the finger-type peristaltic pump, receive a conduit within the housing, and position a conduit compressible segment such that, when the housing is mounted on the pump, alternating linear motion of the fingers causes fluid to flow through the conduit by the pointed ends applying compressive forces, thereby defining contact points where the pointed ends contact the conduit during the alternating linear motion; and a ribbed anvil positioned within the housing to contact a first surface of the conduit opposite a second surface contacted by the fingers, with a longitudinal dimension perpendicular to the linear motion.
First set of protruding ribs across from contact points with flat surface narrower than elongated body width
The ribbed anvil comprising a first set of protruding ribs positioned across from the contact points, each first set rib having a flat surface perpendicular to the linear motion of the fingers narrower than a width of the elongated body configured to provide a counterforce to compressive forces produced by the plurality of fingers, when the housing is mounted to the pump.
Alternating second set of protruding ribs supporting the conduit in between contact points
The ribbed anvil comprising a second set of protruding ribs positioned such that the ribs of the second set alternate with the ribs of the first set and are positioned to interface with the first surface of the conduit opposite the second surface contacted by the fingers in between the contact points, wherein the second set of ribs is configured to support the conduit when compressed.
The core inventive coverage is the combination of a removably mounted interface or housing for a finger-type peristaltic pump that drives fluid through a compressible conduit segment by alternating linear motion, a ribbed anvil with a first set of protruding ribs positioned directly across from finger contact points to provide counterforce, and an alternating second set of protruding ribs positioned between the contact points to support the conduit when compressed. One claim further specifies a system with pointed ends on the fingers and ribs defined with a flat surface narrower than the width of the elongated body.
Stated Advantages
Enable regulation of squeezed volume per pumping cycle.
Reduction of upstream/backflow by restricting tube inflation.
Calibration of each finger’s force requirements.
Optimization of energy for shutoff vs flow.
Minimization of tube degradation.
Accept a range of tube properties/diameters to achieve a predetermined flow capacity by adjusting rib dimensions.
Documented Applications
Finger-type peristaltic pumping of infusing fluid using a finger-type peristaltic pump interface and a ribbed anvil that controls compression and flow through a conduit.
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