US3737256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peristaltic pump construction
Assignee: 3M Co
•
Filing: 1971-07-16
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Granted: 1973-06-05
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Expires: 1991-07-16
Abstract
Abstract A peristaltic pump assembly which utilizes a housing with a circular inner wall to back up a peristaltic tube, and a rotor for progressively squeezing a tube right against that wall. A unique pressure device is utilized on eccentrically mounted pressure rollers in the form of a spring which biases the rollers outwardly against the pump tube with a predetermined resilient pressure. A similar resilient system is utilized for closing the top of the pump which entraps the ingress and egress tubes under resilient pressure.
Inventors
- 👤 Vries J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:54
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1253; F04B43/1276
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
In a peristaltic pump assembly of the type having a housing with a recess and a circular wall forming said recess for positioning a pump tube, and a rotor mounted for rotation within said wall having rollers to contact said tube, that improvement which comprises: a. a front wall on said housing adjacent said recess having spaced notches to receive respective ends of a tube, b. a cover element movably mounted on said housing having a wall to position selectively adjacent said front wall, and having spaced notches to register with the notches in said front wall wherein a tube passing through said respective pairs of notches is held captive, the rollers on said rotor being rotatably mounted on mount pins, eccentric end mounts on said mount pins to locate said pins in said rotor wherein rotation of said pin on said mounts will shift the axis of rotation relative to the axis of said rotor, and resilient means operatively associated with one of said end mounts to impart a rotative bias to said pins urging them radially outward.
Claim 2
Dependent Claim
179 words
In a peristaltic pump assembly of the type having a housing with a recess and a circular wall forming said recess for positioning a pump tube, and a rotor mounted for rotation within said wall having rollers to contact said tube, that improvement which comprises: a. a front wall on said housing adjacent said recess having spaced notches to receive respective ends of a tube, b. a cover element movably mounted on said housing having a wall to position selectively adjacent said front wall, and having spaced notches to register with the notches in said front wall wherein a tube passing through said respective pairs of notches is held captive, the rollers on said rotor being rotatably mounted on mount pins, eccentric end mounts on said mount pins to locate said pins in said rotor wherein rotation of said pin on said mounts will shift the axis of rotation relative to the axis of said rotor, and resilient means operatively associated with one of said end mounts to impart a rotative bias to said pins urging them radially outward.
Claim 3
Dependent Claim
60 words
A pump assembly as defined in claim 1 in which one of said end mounts is enlarged to project at one end of said rotor, and said resilient means comprises a flat S spring, one end being coiled around and anchored to said one enlarged end, and post means on said rotor confining the other end of said S spring.
Claim 4
Dependent Claim
64 words
A pump assembly as defined in claim 2 in which said one end of said S spring is anchored to said enlarged end by a headed screw, and stop pins extending from said rotor to limit the rotative movement of said mount pins in each direction, said pins being positioned in spaced relation in the path of rotation of the head on said screw.
Claim 5
Dependent Claim
125 words
In a peristaltic pump assembly of the type having a housing with a recess and a circular wall forming said recess for positioning a pump tube, and a rotor mounted for rotation within said wall having rollers to contact said tube, that improvement which comprises: a. mount pins for said rollers, b. eccentric end mounts on said rotor for each end of said mount pins to locate said pins in said rotor wherein rotation of each said pin on said mounts will shift the axis of rotation of the pin relative to the axis of said rotor, and c. resilient means operatively associated with one of said end mounts to impart a rotative bias to said pins urging them radially outward toward said circular wall.
Claim 6
Dependent Claim
125 words
In a peristaltic pump assembly of the type having a housing with a recess and a circular wall forming said recess for positioning a pump tube, and a rotor mounted for rotation within said wall having rollers to contact said tube, that improvement which comprises: a. mount pins for said rollers, b. eccentric end mounts on said rotor for each end of said mount pins to locate said pins in said rotor wherein rotation of each said pin on said mounts will shift the axis of rotation of the pin relative to the axis of said rotor, and c. resilient means operatively associated with one of said end mounts to impart a rotative bias to said pins urging them radially outward toward said circular wall.
Claim 7
Dependent Claim
60 words
A pump assembly as defined in claim 4 in which one of said end mounts is enlarged to project at one end of said rotor, and said resilient means comprises a flat S spring, one end being coiled around and anchored to said one enlarged end, and post means on said rotor confining the other end of said S spring.
Claim 8
Dependent Claim
64 words
A pump assembly as defined in claim 5 in which said one end of said S spring is anchored to said enlarged end by a headed screw, and stop pins extending from said rotor to limit the rotative movement of said mount pins in each direction, said pins being positioned in spaced relation in the path of rotation of the head on said screw.
Claim 9
Dependent Claim
171 words
In a peristaltic pump assembly of the type having a housing with a recess and a circular wall forming said recess for positionIng a pump tube, and a rotor mounted for rotation within said wall having rollers to contact said tube, that improvement which comprises: a. a front wall on said housing adjacent said recess having spaced notches to receive respective ends of a tube, b. a cover element movably mounted on said housing having a wall to position selectively adjacent said front wall, and having spaced notches to register with the notches in said front wall wherein a tube passing through said respective pairs of notches is held captive, and c. means to lock said cover element in a tube retaining position comprising a headed screw captive in said cover and threadable into a threaded recess in said housing, and a spring interposed between said screw and said cover element to exert a predetermined bias on said cover element toward said housing to apply a predetermined pressure to said tube.
Claim 10
Dependent Claim
171 words
In a peristaltic pump assembly of the type having a housing with a recess and a circular wall forming said recess for positionIng a pump tube, and a rotor mounted for rotation within said wall having rollers to contact said tube, that improvement which comprises: a. a front wall on said housing adjacent said recess having spaced notches to receive respective ends of a tube, b. a cover element movably mounted on said housing having a wall to position selectively adjacent said front wall, and having spaced notches to register with the notches in said front wall wherein a tube passing through said respective pairs of notches is held captive, and c. means to lock said cover element in a tube retaining position comprising a headed screw captive in said cover and threadable into a threaded recess in said housing, and a spring interposed between said screw and said cover element to exert a predetermined bias on said cover element toward said housing to apply a predetermined pressure to said tube.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |