Finger-type peristaltic pump
First Claim
Patent Images
1. A finger-type peristaltic pump comprising:
- a body, which contains two or more fingers having an extended position and a retracted position; and
a housing comprising a passageway having a first hole configured to receive a conduit so that the fingers, when in their extended position, extend into the housing to compress a segment of the conduit in the passageway,wherein the housing comprises an anti-free flow mechanism to prevent a flow of fluid in the segment of the conduit in the passageway when the conduit is not adjacent to the fingers, the anti-free flow mechanism comprising an occluding plate, which has a second hole located adjacent to the first hole, and which is slidable between a non-obstructing position, in which the first and second holes are aligned to permit the flow of fluid in the segment, and an obstructing position, in which the conduit is collapsed between respective edges of the first and second holes,wherein the anti-free flow mechanism has an obstructing state, an unlatched non-obstructing state and a latched non-obstructing state, andwherein closing the housing against the body when the anti-free flow mechanism is in the latched non-obstructing state causes the anti-free flow mechanism to transition to the unlatched non-obstructing state.
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Abstract
The invention provides a finger-type peristaltic pump (2) having a body (4) and a housing (6). The body contains two or more finger-type valves (16) and a processor (22) configured to operate the valves according to a predetermined temporo-spatial pattern. The housing has a passageway (18) configured to receive a conduit. The housing has a first position in which a conduit in the passageway is positioned adjacent to the valve fingers, and a second position in which a conduit in the passageway is not adjacent to the valve fingers. The invention also provides a housing for use in the pump of the invention.
103 Citations
21 Claims
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1. A finger-type peristaltic pump comprising:
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a body, which contains two or more fingers having an extended position and a retracted position; and a housing comprising a passageway having a first hole configured to receive a conduit so that the fingers, when in their extended position, extend into the housing to compress a segment of the conduit in the passageway, wherein the housing comprises an anti-free flow mechanism to prevent a flow of fluid in the segment of the conduit in the passageway when the conduit is not adjacent to the fingers, the anti-free flow mechanism comprising an occluding plate, which has a second hole located adjacent to the first hole, and which is slidable between a non-obstructing position, in which the first and second holes are aligned to permit the flow of fluid in the segment, and an obstructing position, in which the conduit is collapsed between respective edges of the first and second holes, wherein the anti-free flow mechanism has an obstructing state, an unlatched non-obstructing state and a latched non-obstructing state, and wherein closing the housing against the body when the anti-free flow mechanism is in the latched non-obstructing state causes the anti-free flow mechanism to transition to the unlatched non-obstructing state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A finger-type peristaltic pump comprising:
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a body, which contains two or more fingers having an extended position and a retracted position; and a housing comprising a passageway having a first hole configured to receive a conduit so that the fingers, when in their extended position, extend into the housing to compress a segment of the conduit in the passageway, wherein the housing comprises an anti-free flow mechanism to prevent a flow of fluid in the segment of the conduit in the passageway when the conduit is not adjacent to the fingers, the anti-free flow mechanism comprising an occluding plate, which has a second hole located adjacent to the first hole, and which is slidable between a non-obstructing position, in which the first and second holes are aligned to permit the flow of fluid in the segment, and an obstructing position, in which the conduit is collapsed between respective edges of the first and second holes, wherein the anti-free flow mechanism comprises a spring, which biases the occluding plate in the obstructing position, and wherein the body comprises a static plate, which depresses the spring when the housing is closed against the body so as to maintain the occluding plate in the non-obstructing position. - View Dependent Claims (21)
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Specification