Patent US3737251A successfully refreshed from Google Patents.
US3737251A
Expired / Lapsed
US
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Peristaltic pump
Assignee: Alphamedics Manufacturing Corp
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Filing: 1971-02-08
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Granted: 1973-06-05
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Expires: 1991-02-08
Abstract
Abstract A peristaltic or roller pump is disclosed in which a pair of compressible tubes of unequal inside diameter are held between pumping shoes and a rotor. The rotor has a plurality of pins equally spaced along the periphery thereof. Each of the pins carries one roller thereon for occluding the larger tube. Alternate pins carrying a second roller for occluding the smaller tube. A stepping motor is employed to drive the rotor in angular increments so that a precision volume can be dispensed. The stepping motor is driven by pulses which initially have a greater interval therebetween than would occur during the normal operation thereof. In this way, the rotor can be driven with a small torque stepping motor. The ends of the tubes are rigidly held adjacent to the associated pumping shoes so that the pump will operate symmetrically with the rotor being driven in either a pick up or delivery mode.
Inventors
- 👤 R Berman
- 👤 B Schwartz
- 👤 L Bethke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:19
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095; B; B01; B01L; B01L3/00; B01L3/02; B01L3/0289; B01L3/0293; F; F04; F04B; F04B43/00; F04B43/12; F04B43/1253; F04B43/1292; Y; Y10; Y10S; Y10S128/00; Y10S128/13
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
128 words
A peristaltic pump including: a housing; a rotor having a peripheral edge mounted for rotation on said housing; a plurality of rollers mounted on said rotor along said peripheral edge; a pumping shoe mounted on said housing; a compressible tube mounted between said pumping shoe and said rotor so that said rollers sequentially occlude said compressible tube against said pumping shoe; said peristaltic pump characterized by; a motor responsive to an incrementing signal for turning said rotor a fixed angular increment; and means responsive to a first start signal for repeatedly generating said incrementing signal; said incrementing signal generating means normally generates said incrementing signal at a first rate and initially generates said incrementing signal at a second rate, said second rate being lower than said first rate.
Claim 2
Dependent Claim
128 words
A peristaltic pump including: a housing; a rotor having a peripheral edge mounted for rotation on said housing; a plurality of rollers mounted on said rotor along said peripheral edge; a pumping shoe mounted on said housing; a compressible tube mounted between said pumping shoe and said rotor so that said rollers sequentially occlude said compressible tube against said pumping shoe; said peristaltic pump characterized by; a motor responsive to an incrementing signal for turning said rotor a fixed angular increment; and means responsive to a first start signal for repeatedly generating said incrementing signal; said incrementing signal generating means normally generates said incrementing signal at a first rate and initially generates said incrementing signal at a second rate, said second rate being lower than said first rate.
Claim 3
Dependent Claim
31 words
The peristaltic pump as defined in claim 1 further characterized by: said incrementing signal generating means varying said generation of said incrementIng signal from said second rate to said first rate.
Claim 4
Dependent Claim
19 words
The peristaltic pump as defined in claim 2 further characterized by: means for periodically generating said first start signal.
Claim 5
Dependent Claim
108 words
A peristaltic pump including: a housing; a rotor having a peripheral edge mounted for rotation on said housing; a plurality of rollers mounted on said rotor along said peripheral edge; a pumping shoe mounted on said housing; a compressible tube mounted between said pumping shoe and said rotor so that said rollers may sequentially occlude said compressible tube against said pumping shoe; said peristaltic pump characterized by: a motor responsive to an incrementing signal for turning said rotor a fixed angular increment; first means enabled by said first start signal; settable to a first preset count, for counting said incrementing signal to disable said incrementing signal generating means.
Claim 6
Dependent Claim
108 words
A peristaltic pump including: a housing; a rotor having a peripheral edge mounted for rotation on said housing; a plurality of rollers mounted on said rotor along said peripheral edge; a pumping shoe mounted on said housing; a compressible tube mounted between said pumping shoe and said rotor so that said rollers may sequentially occlude said compressible tube against said pumping shoe; said peristaltic pump characterized by: a motor responsive to an incrementing signal for turning said rotor a fixed angular increment; first means enabled by said first start signal; settable to a first preset count, for counting said incrementing signal to disable said incrementing signal generating means.
Claim 7
Dependent Claim
44 words
The peristaltic pump as defined in claim 4 further characterized by: said incrementing signal generating means normally generates said incrementing signal at a first rate and initially generates said incrementing signal at a second rate, said second rate being lower than said first rate.
Claim 8
Dependent Claim
47 words
The peristaltic pump as defined in claim 4 further characterized by: means for generating a second start signal; and said motor is responsive to said rotor in a first direction and said incrementing signal and said second start signal to turn said rotor in a second direction.
Claim 9
Dependent Claim
37 words
The peristaltic pump as defined in claim 6 further characterized by: second means enabled by said second start signal, settable to a second preset count, for counting said incrementing signal to disable said incrementing signal generating means.
Claim 10
Dependent Claim
50 words
The peristaltic pump as defined in claim 7 further characterized by: means for generating a third start signal; and means responsive to said third start signal for disabling said incrementing signal generating means after the occurrence of incrementing signals equal to the sum of said first and second preset counts.
Claim 11
Dependent Claim
44 words
The peristaltic pump as defined in claim 8 further characterized by: said incrementing signal generating means normally generates said incrementing signal at a first rate and initially generates said incrementing signal at a second rate, said second rate being lower than said first rate.
Claim 12
Dependent Claim
31 words
The peristaltic pump as defined in claim 9 further characterized by: said incrementing signal generating means varying said generation of said incrementing signal from said second rate to said first rate.
Claim 13
Dependent Claim
196 words
In combination: a housing; a rotor having a peripheral edge mounted for rotation on said housing; a plurality of roller bearing pins mounted on said rotor along said peripheral edge; first and second adjustable pumping shoes mounted on said housing; first and second compressible tubes mounted between said first and second adjustable pumping shoes respectively and said roller bearing pins; a first plurality of rollers moiunted on each of said plurality roller bearing pins to occlude said first compressible tube against first pumping shoes; a second plurality of rollers mounted on some of said plurality roller bearing pins to occlude said second compressible tube against said second pumping shoe; said first compressible tube having a first inside diameter and said second compressible tube having a second inside diameter smaller than said first inside diameter; said second plurality of rollers are arranged on alternate ones of said plurality of roller bearing pins; and means responsive to a start signal for repeatedly generating incrementing signal; said incrementing signal generating means normally generates said incrementing signal at a first rate and initially generates said incrementing signal at a second rate, said second rate being lower than said first rate.
Claim 14
Dependent Claim
196 words
In combination: a housing; a rotor having a peripheral edge mounted for rotation on said housing; a plurality of roller bearing pins mounted on said rotor along said peripheral edge; first and second adjustable pumping shoes mounted on said housing; first and second compressible tubes mounted between said first and second adjustable pumping shoes respectively and said roller bearing pins; a first plurality of rollers moiunted on each of said plurality roller bearing pins to occlude said first compressible tube against first pumping shoes; a second plurality of rollers mounted on some of said plurality roller bearing pins to occlude said second compressible tube against said second pumping shoe; said first compressible tube having a first inside diameter and said second compressible tube having a second inside diameter smaller than said first inside diameter; said second plurality of rollers are arranged on alternate ones of said plurality of roller bearing pins; and means responsive to a start signal for repeatedly generating incrementing signal; said incrementing signal generating means normally generates said incrementing signal at a first rate and initially generates said incrementing signal at a second rate, said second rate being lower than said first rate.
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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 |