US4392794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peristaltic pump
Assignee: Individual
•
Filing: 1980-12-29
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Granted: 1983-07-12
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Expires: 2000-12-29
Abstract
Abstract A peristaltic pump having a housing which is formed with an annular recess which has an arcuate cross-sectional configuration, is provided with a conduit extending within the recess. The conduit has a back wall shaped to conform to the cross-sectional configuration of the recess and a flexible front wall extending transversely between opposite side edges of the back wall. Slide flanges are provided at each side edge of the front and side walls and are secured with respect to the housing to secure the conduit with respect to the housing and to hold the flanges taut. A pumping member is provided which has a rotor mounted for rotation and a plurality of rollers mounted on the rotor. The rollers each have a profile adapted to mate with the arcuate cross-sectional configuration of the recess and the pumping member is mounted with the rollers extending into the recess to an extent sufficient to compress the conduits to form transversely extending nips in each conduit. A drive motor is provided for rotatably driving the rotor.
Inventors
- 👤 Arthur Foxcroft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:21
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/14; F04B43/1253; F04B43/1269
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
352 words
A peristaltic pump comprising, (a) a housing having a front end and a back end, an annular recess formed in the front end of the housing and extending circumferentially about a first axis, said annular recess having a uniform arcuate cross-sectional configuration along its length and a pair of radially spaced side edges at the front end of the housing, first and second passages opening through the housing from the recess to the back end of the housing at circumferentially spaced intervals about the housing, (b) first and second conduits each having; a back wall shaped to conform to the cross-sectional configuration of the recess and a flexible front wall extending transversely across the back wall, an input end and an output end, said conduits being mounted in said annular recess at circumferentially spaced intervals with the input end and output end of the first conduit extending through said first and second passages respectively, and the input end and output end of the second conduit extending through said second and first passages, respectively, the back wall of each conduit being supported within the recess and the flexible front wall of each conduit extending in a first plane which is perpendicular to the first axis, said conduits each having side flanges which are secured to said housing holding said front wall taut (c) a pumping member comprising; (i) a rotor mounted for rotation about said first axis, (ii) three rollers mounted on said rotor at uniformly spaced circumferential intervals about said first axis each for rotation about a radially directed axis, each roller having a profile adapted to mate with the arcuate cross-sectional configuration of the recess, said pumping member being mounted with said rollers extending into the recess to an extent sufficient to stretch the front wall of the conduits into engagement with the back wall thereby to form transversely extending occlusions in each conduit, (d) drive means engaging said rotor to rotatably drive it about said first axis to cause successively formed occlusions to move along each conduit from the input end to the output end to effect pumping in use.
Claim 2
Dependent Claim
352 words
A peristaltic pump comprising, (a) a housing having a front end and a back end, an annular recess formed in the front end of the housing and extending circumferentially about a first axis, said annular recess having a uniform arcuate cross-sectional configuration along its length and a pair of radially spaced side edges at the front end of the housing, first and second passages opening through the housing from the recess to the back end of the housing at circumferentially spaced intervals about the housing, (b) first and second conduits each having; a back wall shaped to conform to the cross-sectional configuration of the recess and a flexible front wall extending transversely across the back wall, an input end and an output end, said conduits being mounted in said annular recess at circumferentially spaced intervals with the input end and output end of the first conduit extending through said first and second passages respectively, and the input end and output end of the second conduit extending through said second and first passages, respectively, the back wall of each conduit being supported within the recess and the flexible front wall of each conduit extending in a first plane which is perpendicular to the first axis, said conduits each having side flanges which are secured to said housing holding said front wall taut (c) a pumping member comprising; (i) a rotor mounted for rotation about said first axis, (ii) three rollers mounted on said rotor at uniformly spaced circumferential intervals about said first axis each for rotation about a radially directed axis, each roller having a profile adapted to mate with the arcuate cross-sectional configuration of the recess, said pumping member being mounted with said rollers extending into the recess to an extent sufficient to stretch the front wall of the conduits into engagement with the back wall thereby to form transversely extending occlusions in each conduit, (d) drive means engaging said rotor to rotatably drive it about said first axis to cause successively formed occlusions to move along each conduit from the input end to the output end to effect pumping in use.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |