Patent US2867566A successfully refreshed from Google Patents.
Patent US3684408A successfully refreshed from Google Patents.
US3684408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peristaltic metering and dispensing pump
Assignee: Alfa Wassermann Inc
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Filing: 1970-07-29
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Granted: 1972-08-15
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Expires: 1990-07-29
Abstract
Abstract A peristaltic fluid metering and dispensing pump consists of a rigid base for supporting elastic tubing. Elastic tubes are supported on the base. One end of each tube is blocked on the base while the other end extends beyond the base for submersion in a liquid to be dispensed. Tube compressing means operating upon at least two tubes simultaneously is provided to alternately compress the tubing against the base and then release the tubing. Air is first expelled from the tubing and liquid is then drawn through the free end of the tubing when the latter is released; liquid is expelled from the same end of the tubing when it is again compressed.
Inventors
- 👤 Ernest Maclin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:41
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1207; F04B43/1223; F04B43/1253; F04B43/1261; F04B43/1269; F04B43/1292
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A peristaltic fluid metering and dispensing pump comprising elastic tubing having one end thereof secured by means effectively blocking said one end thereof, a support body for a length of said tubing, the free end of said tubing extending beyond said support body for immersion in a fluid, and tube occluding means cooperating with said support body adapted to periodically compress said tubing to fill and occlude the same, in which a plurality of tubes are circularly arranged and held on said support body, and said tube occluding means compresses at least two of said tubes simultaneously.
Claim 2
Dependent Claim
97 words
A peristaltic fluid metering and dispensing pump comprising elastic tubing having one end thereof secured by means effectively blocking said one end thereof, a support body for a length of said tubing, the free end of said tubing extending beyond said support body for immersion in a fluid, and tube occluding means cooperating with said support body adapted to periodically compress said tubing to fill and occlude the same, in which a plurality of tubes are circularly arranged and held on said support body, and said tube occluding means compresses at least two of said tubes simultaneously.
Claim 3
Dependent Claim
22 words
The arrangement of claim 1 in which said tube occluding means comprises a plurality of rollers mounted for contact with said tubes.
Claim 4
Dependent Claim
34 words
The arrangement of claim 1 wherein said last named means comprises reciprocating means mounted to move toward and away from said body and compress said tubing between said reciprocating means and said support body.
Claim 5
Dependent Claim
17 words
The arrangement of claim 1 wherein a plurality of tubes are arranged radially upon said support body.
Claim 6
Dependent Claim
15 words
The arrangement of claim 1, in which said tubes are supported upon a cylindrical surface.
Claim 7
Dependent Claim
15 words
The arrangement of claim 1, in which alternate ones of said tubes are compressed simultaneously.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |