Compact peristaltic metering pump
First Claim
Patent Images
1. A self-contained, enclosed, flexible tube metering pump assembly, comprising:
- a hollow, box-like housing enclosed by plural walls;
a motor unit and a pump unit fixed in said housing, said pump unit having a rotor driven by said motor unit;
a pump assembly mounting member fixed to and extending through a wall of said housing, said mounting member having an externally accessible part engageable with a conventional external power source for (1) mechanically mounting said pump assembly thereon and (2) supplying operating power thereto, said mounting member having an internal part in said housing adjacent said motor unit, an elongate member in said housing connecting said internal part to said motor unit for energizing said motor unit, said mounting member defining a power supply connector.
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Abstract
An improved, flexible tube, pump assembly comprising a housing having a cover, a motor unit and pump unit driven thereby. The motor unit and pump unit are fixed in said housing and said pump assembly comprises a minimal number of parts.
34 Citations
16 Claims
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1. A self-contained, enclosed, flexible tube metering pump assembly, comprising:
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a hollow, box-like housing enclosed by plural walls;
a motor unit and a pump unit fixed in said housing, said pump unit having a rotor driven by said motor unit;
a pump assembly mounting member fixed to and extending through a wall of said housing, said mounting member having an externally accessible part engageable with a conventional external power source for (1) mechanically mounting said pump assembly thereon and (2) supplying operating power thereto, said mounting member having an internal part in said housing adjacent said motor unit, an elongate member in said housing connecting said internal part to said motor unit for energizing said motor unit, said mounting member defining a power supply connector. - View Dependent Claims (2, 3, 4, 5)
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6. A self-contained, enclosed, flexible tube metering pump assembly, comprising:
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a housing enclosed by plural walls comprising an open front cup closed by a cover, said cup having a back wall spaced opposite said cover and a perimeter wall, said cover and back wall and perimeter wall defining said plural housing walls;
a motor unit having a casing and a forward extending shaft rotatable with respect to said casing, said casing being disposed in said housing and against said back wall;
a pump unit comprising a fixed member and a rotor rotatably located in said fixed member and operatively connected to said shaft for rotation thereby, said pump unit being disposed in said housing and located against and between said motor unit and cover, said back wall and cover thereby fixing said motor unit and pump unit therebetween. - View Dependent Claims (7, 8, 9, 12, 14)
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10. A self-contained, enclosed, flexible tube metering pump assembly, comprising:
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a housing enclosed by plural walls comprising an open front cup closed by a cover, said cup having a back wall spaced opposite said cover and a perimeter wall, said cover and back wall and perimeter wall defining said plural housing walls;
a motor unit in said housing and backed by said back wall and having a forward extending shaft;
a pump unit in said housing and located between said motor unit and cover, said pump unit comprising a rotor, said back wall and cover clamping and thereby fixing said motor unit and pump unit therebetween, in which said motor unit is mounted with respect to said housing back wall for limited movement of said shaft in a direction parallel to said back wall and with respect to the rotation axis of said rotor, said cover having a bearing for said rotor, said motor unit shaft thus being self-centering with respect to said rotor.
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11. A self-contained, enclosed, flexible tube metering pump assembly, comprising:
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a housing enclosed by plural walls comprising an open front cup closed by a cover, said cup having a back wall spaced opposite said cover and a perimeter wall, said cover and back wall and perimeter wall defining said plural housing walls;
a motor unit in said housing and backed by said back wall and having a forward extending shaft;
a pump unit in said housing and located between said motor unit and cover, said pump unit comprising a rotor, said back wall and cover clamping and thereby fixing said motor unit and pump unit therebetween, in which said rotor has a boss coaxial with said shaft and extending forward toward said cover, said cover having a bearing coaxially receiving said boss in rotatable bearing relation, said cover bearing comprising a recess in the interior face of said cover.
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13. A self-contained, enclosed, flexible tube metering pump assembly, comprising:
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a housing enclosed by plural walls comprising an open front cup closed by a cover, said cup having a back wall spaced opposite said cover and a perimeter wall, said cover and back wall and perimeter wall defining said plural housing walls;
a motor unit in said housing and backed by said back wall and having a forward extending shaft;
a pump unit in said housing and located between said motor unit and cover, said pump unit comprising a rotor, said back wall and cover clamping and thereby fixing said motor unit and pump unit therebetween, in which said motor unit has a substantially circular motor casing portion adjacent said back wall, pins fixedly protruding forward from said back wall and circumferentially spaced snugly around said motor casing portion and permitting motor unit rotation but blocking motor unit linear displacement along said back wall, said motor casing portion and pins defining a male/female connection therebetween.
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15. A self-contained, enclosed flexible tube metering pump assembly, comprising:
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a hollow box-like housing enclosed by plural walls, said walls defining cup having an open front and a cover closing said front of said cup;
a mounting unit and pump unit in said housing, said pump unit comprising a shield, said shield having a substantially semi-circular peripheral wall including an open side portion and a back wall spanning said peripheral wall, said shield back wall being split by a slot extending from said open side portion of said shield substantially to an intermediate portion of said shield peripheral wall, said intermediate portion including a hinge adjacent an end of said slot and permitting relative hinging apart of two parts of said shield separated by said slot, said pump unit further comprising a rotor including a disc, and an array of rollers rotatable on said disc and a resiliently pinchable tube pressed against said shield peripheral wall by said rollers, said hinging apart of shield parts easing insertion rearward of said rotor and tube into said shield. - View Dependent Claims (16)
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Specification