US3227172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulating valve with balanced spring adjusting means
Assignee: Davy Loewy Ltd
•
Filing: 1963-05-29
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Granted: 1966-01-04
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Expires: 1983-05-29
Abstract
No abstract record available.
Inventors
- 👤 Sims Raymond Bernard
- 👤 Bathory Bela Istvan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:44
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/20; G05D16/2086; B; B21; B21B; B21B37/00; B21B37/48; B21B37/50; G05D16/04; G05D16/10; G05D16/101; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7801; Y10T137/7809
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
329 words
A LIQUID PRESSURE REGULATING DEVICE COMPRISING A VALVE BODY ELONGATELY HOLLOWED AND HAVING, SEQUENTIALLY RELATIVE TO THE AXIS OF THE HOLLOW, A FIRST VALVE PORT FOR INLET OF LIQUID AT A PRESSURE EXCEEDING A REQUIRED VALUE, A SECOND VALVE PORT FOR OUTLET OF LIQUID AT REGULATED PRESSURE, AND A THIRD VALVE PORT FOR OUTLET OF EXCESS LIQUID; A FIRST SPOOL COAXIALLY AND SLIDABLY MOUNTED IN THE VALVE BODY HOLLOW TO SUBSTANTIALLY SEAL THE ENDS OF A PORTION OF THE HOLLOW WITH WHICH SAID VALVE PORTS COMMUNICATE, THE SPOOL HAVING A LAND MOVABLE THEREWITH WHEREBY THE SECOND VALVE PORT COMMUNICATES VARIABLY AND ALTERNATELY WITH THE FIRST AND THIRD VALVE PORTS, SAID SPOOL BEING HOLLOWED AND OPEN AT BOTH ITS AXIAL ENDS AND HAVING A PORT FOR COMMUNICATION BETWEEN THE SECOND VALVE PORT AND THE SPOOL HOLLOW WHEREBY, IN OPERATION, LIQUID AT REGULATED PRESSURE ENTERS THE SPOOL HOLLOW AND APPLIES A FORCE ON THE SPOOL PROPORTIONAL AT REGULATED PRESSURE AND TENDING TO EFFECT AND INCREASE COMMUNICATION BETWEEN THE SECOND AND THIRD VALVE PORTS; ADJUSTMENT MEANS FIXABLY LOCATED RELATIVE TO THE VALVE BODY IN RESPECT OF MOVEMENT ALONG SAID AXIS AND LOCATED TOWARDS THE END OF THE VALVE BODY HOLLOW NEARER THE FIRST VALVE PORT; AN ANNULAR SEATING MEMBER OPERABLY CONNECTED WITH SAID ADJUSTMENT MEANS AND ADJUSTABLE ALONG SAID AXIS THEREBY; COMPRESSION SPRING MEANS MOUNTED AT ONE END ON SAID SEATING MEMBER AND AT ITS OTHER END ON THE ADJACENT SPOOL END TO APPLY A FORCE ON THE SPOOL TENDING TO EFFECT AND INCREASE COMMUNICATION BETWEEN THE FIRST AND SECOND VALVE PORTS; SAID SEATING MEMBER HAVING AN EXTERNAL SEATING FOR SAID SPRING MEANS AND AN INTERNAL SEATING IN OPPOSITION THERETO; MEANS FOR APPLYING A FORCE ON SAID SEATING MEMBER IN OPPOSITION TO THE COMPRESSION SPRING REACTION THEREON AND SUBSTANTIALLY EQUAL TO THE FORCE APPLIED HYDRAULICALLY ON THE SPOOL IN PROPORTION TO REGULATED PRESSURE, SAID FORCE APPLYING MEANS COMPRISING A BALANCE SPOOL HAVING A HOLLOW OPEN-ENDED BODY PORTION SEATED AT ONE END ON
Claim 2
Dependent Claim
329 words
A LIQUID PRESSURE REGULATING DEVICE COMPRISING A VALVE BODY ELONGATELY HOLLOWED AND HAVING, SEQUENTIALLY RELATIVE TO THE AXIS OF THE HOLLOW, A FIRST VALVE PORT FOR INLET OF LIQUID AT A PRESSURE EXCEEDING A REQUIRED VALUE, A SECOND VALVE PORT FOR OUTLET OF LIQUID AT REGULATED PRESSURE, AND A THIRD VALVE PORT FOR OUTLET OF EXCESS LIQUID; A FIRST SPOOL COAXIALLY AND SLIDABLY MOUNTED IN THE VALVE BODY HOLLOW TO SUBSTANTIALLY SEAL THE ENDS OF A PORTION OF THE HOLLOW WITH WHICH SAID VALVE PORTS COMMUNICATE, THE SPOOL HAVING A LAND MOVABLE THEREWITH WHEREBY THE SECOND VALVE PORT COMMUNICATES VARIABLY AND ALTERNATELY WITH THE FIRST AND THIRD VALVE PORTS, SAID SPOOL BEING HOLLOWED AND OPEN AT BOTH ITS AXIAL ENDS AND HAVING A PORT FOR COMMUNICATION BETWEEN THE SECOND VALVE PORT AND THE SPOOL HOLLOW WHEREBY, IN OPERATION, LIQUID AT REGULATED PRESSURE ENTERS THE SPOOL HOLLOW AND APPLIES A FORCE ON THE SPOOL PROPORTIONAL AT REGULATED PRESSURE AND TENDING TO EFFECT AND INCREASE COMMUNICATION BETWEEN THE SECOND AND THIRD VALVE PORTS; ADJUSTMENT MEANS FIXABLY LOCATED RELATIVE TO THE VALVE BODY IN RESPECT OF MOVEMENT ALONG SAID AXIS AND LOCATED TOWARDS THE END OF THE VALVE BODY HOLLOW NEARER THE FIRST VALVE PORT; AN ANNULAR SEATING MEMBER OPERABLY CONNECTED WITH SAID ADJUSTMENT MEANS AND ADJUSTABLE ALONG SAID AXIS THEREBY; COMPRESSION SPRING MEANS MOUNTED AT ONE END ON SAID SEATING MEMBER AND AT ITS OTHER END ON THE ADJACENT SPOOL END TO APPLY A FORCE ON THE SPOOL TENDING TO EFFECT AND INCREASE COMMUNICATION BETWEEN THE FIRST AND SECOND VALVE PORTS; SAID SEATING MEMBER HAVING AN EXTERNAL SEATING FOR SAID SPRING MEANS AND AN INTERNAL SEATING IN OPPOSITION THERETO; MEANS FOR APPLYING A FORCE ON SAID SEATING MEMBER IN OPPOSITION TO THE COMPRESSION SPRING REACTION THEREON AND SUBSTANTIALLY EQUAL TO THE FORCE APPLIED HYDRAULICALLY ON THE SPOOL IN PROPORTION TO REGULATED PRESSURE, SAID FORCE APPLYING MEANS COMPRISING A BALANCE SPOOL HAVING A HOLLOW OPEN-ENDED BODY PORTION SEATED AT ONE END ON
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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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |