Method and apparatus for the pumping of fluids at substantially constant flow rate
Abstract
Abstract NEW AND IMPROVED METHOD AND APPARATUS FOR THE PUMPING OF FLUIDS AT SUBSTANTIALLY CONSTANT FLOW RATE ARE PROVIDED AND COMPRISE THE USE OF COMPRESSIBLE TUBE PUMP MEANS WHICH ARE OPERABLE TO PUMP A STREAM OF A SERIES OF FLUID SAMPLE PORTIONS SPACED, EACH FROM THE OTHER, BY A SEPARATING FLUID PORTION, THROUGH A COMPRESSIBLE PUMP TUBE BY THE CONCOMITANT, PROGRESSIVE OCCLUSION OF SAID PUMP TUBE BY A PLURALITY OF SUBSTANTIALLY EQUALLY SPACED PUMP ROLLERS ONLY AT LOCATIONS ON THE FORMER CORRESPONDING TO THE LOCATIONS THEREIN OF SOME, AT LEAST, OF SAID SEPARATING FLUID PORTIONS WHEREBY ONE OR MORE OF SAID FLUID SAMPLE PORTIONS WILL BE LOCATED IN SAID PUMP TUBE ENTIRELY BETWEEN SAID OCCLUDED LOCATIONS THEREON TO PROVIDE FOR A SUBSTANTIALLY CONSTANT PUMP DELIVERY, SAMPLE PORTION FLOW RATE.
Inventors
- 👤 Jack Isreeli
- 👤 Aaron Kassel
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
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| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |