US3679331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering pump and valve
Assignee: Rosemount Inc
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Filing: 1970-04-24
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Granted: 1972-07-25
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Expires: 1990-04-24
Abstract
Abstract A metering pump and valve combination is disclosed wherein means are provided for pumping discrete quantities of fluid such as might be used as samples for analysis. The pump includes a resilient tube which is flexed in a traverse direction in a manner which precludes exceeding the elastic limit of the tube.
Inventors
- 👤 Jack Kushner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:35
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/086
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
185 words
A metering pump comprising: a. a pump body having a plurality of fluid inlet and outlet means; b. a resilient walled tubular conduit connected between each inlet and outlet means, the wall of each of said conduits being flexible in a direction transverse to its length; c. separate rigid support means for each conduit extending lengthwise along one side thereof; d. valve means connected to each of said conduits for admitting a discrete quantity of fluid thereto and for ejecting a quantity therefrom in response to flexing of said conduit; e. presser plate means mounted on said pump body adjacent to and on the side of said conduits opposite said support means, said presser plate means having separate segments aligned with each of said conduits for movement independently of each other into contact with the aligned conduits; f. selectively operable cam means for moving the segments of said presser plate means against the aligned conduits to flex said conduits transversely; and g. means for independently adjusting and fixing the positions of the support means for each of said conduits relative to said presser plate means.
Claim 2
Dependent Claim
185 words
A metering pump comprising: a. a pump body having a plurality of fluid inlet and outlet means; b. a resilient walled tubular conduit connected between each inlet and outlet means, the wall of each of said conduits being flexible in a direction transverse to its length; c. separate rigid support means for each conduit extending lengthwise along one side thereof; d. valve means connected to each of said conduits for admitting a discrete quantity of fluid thereto and for ejecting a quantity therefrom in response to flexing of said conduit; e. presser plate means mounted on said pump body adjacent to and on the side of said conduits opposite said support means, said presser plate means having separate segments aligned with each of said conduits for movement independently of each other into contact with the aligned conduits; f. selectively operable cam means for moving the segments of said presser plate means against the aligned conduits to flex said conduits transversely; and g. means for independently adjusting and fixing the positions of the support means for each of said conduits relative to said presser plate means.
Claim 3
Dependent Claim
33 words
The pump according to claim 1 wherein: a. said cam means comprises a single cam element rotatably mounted for movement into simultaneous contact with each of the segments of said presser plate means.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |