Patent US3225126A successfully refreshed from Google Patents.
Patent US3174504A successfully refreshed from Google Patents.
US3174504A
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Apparatus for controlling flow of material
Assignee: Worley Field Services Ltd
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Filing: 1959-09-14
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Granted: 1965-03-23
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Expires: 1979-09-14
Abstract
No abstract record available.
Inventors
- 👤 Rosenbrock Howard Harry
- 👤 Jiskoot Joost Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:59
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; G05D7/0629; G05D7/0635; G05D11/00; G05D11/02; G05D11/13; G05D11/131; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7759; Y10T137/7761
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
APPARATUS FOR CONTROLLING THE RATE OF FLOW OF AT LEAST ONE STREAM OF MATERIAL, WHICH APPARATUS COMPRISES, IN COMBINATION, ELECTRONIC REFERENCE PULSE GENERATOR FOR PRODUCING A CONTINUOUS SUCCESSION OF ELECTRICAL PULSES AT A SUBSTANTIALLY CONSTANT RATE INDEPENDENT OF ANY FLOW RATE, A FLOW ULSE GENERATOR FOR PRODUCING A CONTINUOUS SUCCESSION OF ELECTRICAL PULSES AT AN INSTANTANEOUS RATE PROPORTIONAL TO THE RATE OF FLOW OF SAID STREAM OF MATERIAL, ELECTRONIC MEANS FOR DETECTING ANY DEPARTURE FROM A PREDETERMINED RELATIONSHIP BETWEEN THE RATE OF PRODUCTION OF THE REFERENCE PULSES AND OF THE FLOW PULSES AND FOR PRODUCING AN ELECTRICAL OUTPUT INDICATIVE OF THE DIRECTION OF DEPARTURE FROM SAID RELATIONSHIP, AND MEANS CONTROLLED BY THE ELECTRICAL OUTPUT OF SAID ELECTRONIC DETECTING MEANS FOR CHANGING THE RATE OF FLOW OF THE STREAM IN A DIRECTION TO TEND TO RESTORE THE PREDETERMINED RELATIONSHIP.
Claim 2
Dependent Claim
138 words
APPARATUS FOR CONTROLLING THE RATE OF FLOW OF AT LEAST ONE STREAM OF MATERIAL, WHICH APPARATUS COMPRISES, IN COMBINATION, ELECTRONIC REFERENCE PULSE GENERATOR FOR PRODUCING A CONTINUOUS SUCCESSION OF ELECTRICAL PULSES AT A SUBSTANTIALLY CONSTANT RATE INDEPENDENT OF ANY FLOW RATE, A FLOW ULSE GENERATOR FOR PRODUCING A CONTINUOUS SUCCESSION OF ELECTRICAL PULSES AT AN INSTANTANEOUS RATE PROPORTIONAL TO THE RATE OF FLOW OF SAID STREAM OF MATERIAL, ELECTRONIC MEANS FOR DETECTING ANY DEPARTURE FROM A PREDETERMINED RELATIONSHIP BETWEEN THE RATE OF PRODUCTION OF THE REFERENCE PULSES AND OF THE FLOW PULSES AND FOR PRODUCING AN ELECTRICAL OUTPUT INDICATIVE OF THE DIRECTION OF DEPARTURE FROM SAID RELATIONSHIP, AND MEANS CONTROLLED BY THE ELECTRICAL OUTPUT OF SAID ELECTRONIC DETECTING MEANS FOR CHANGING THE RATE OF FLOW OF THE STREAM IN A DIRECTION TO TEND TO RESTORE THE PREDETERMINED RELATIONSHIP.
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |