Patent US3179040A successfully refreshed from Google Patents.
US3179040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relief valve
Assignee: American Baler Co
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Filing: 1961-11-06
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Granted: 1965-04-20
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Expires: 1981-11-06
Abstract
No abstract record available.
Inventors
- 👤 Robert E Seltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:05
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/30; B30B9/3003; B30B9/3025; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7768; Y10T137/7781; Y10T137/7793; Y10T137/7796
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A HYDRAULIC VALVE COMPRISING A CHAMBER HAVING AN INLET PASSAGE, AN OUTLET PASSAGE, A PRESSURE FEEDBACK PASSAGE IN COMMUNICATION EXTERNALLY OF SAID CHAMBER WITH SAID OUTLET PASSAGE, AND A PRESSURE RELIEF PASSAGE, MOVABLE VALVE MEANS IN SAID CHAMBER FOR CONTROLLING COMMUNICATION BETWEEN SAID INLET AND SAID OUTLET PASSAGES AND BETWEEN SAID INLET AND SAID OUTLET PRESSURE RELIEF PASSAGE, SAID VALVE MEANS BEING SPRING-BIASED TO A POSITION PERMITTING COMMUNICATION BETWEEN SAID INLET PASSAGE AND SAID OUTLET PASSAGE AND BIASED BY PRESSURE IN SID OUTLET PASSAGE COMMUNICATED THROUGH SAID PRESSURE FEEDBACK PASSAGE TO A POSITION TENDING TO REDUCE COMMUNICATION BETWEEN SAID INLET PASSAGE AND SAID OUTLET PASSAGE, AND HYDRAULICALLY ACTUATED MEANS INCLUDING AN ELEMENT MOVABLE IN RESPONSE TO A PREDETERMINED PRESSURE IN SAID INLET PASSAGE AND OPERATIVELY CONNECTED TO SAID MOVABLE VALVE MEANS FOR TENDING TO MOVE SAID VALVE MEANS TO A POSITION PERMITTING COMMUNICATING BETWEEN SAID OUTLET PASSAGE AND SAID RELIEF PASSAGE WHEN THE PRESSURE IN SAID INLET PASSAGE EXCEEDS SAID PREDETERMINED PRESSURE.
Claim 2
Dependent Claim
162 words
A HYDRAULIC VALVE COMPRISING A CHAMBER HAVING AN INLET PASSAGE, AN OUTLET PASSAGE, A PRESSURE FEEDBACK PASSAGE IN COMMUNICATION EXTERNALLY OF SAID CHAMBER WITH SAID OUTLET PASSAGE, AND A PRESSURE RELIEF PASSAGE, MOVABLE VALVE MEANS IN SAID CHAMBER FOR CONTROLLING COMMUNICATION BETWEEN SAID INLET AND SAID OUTLET PASSAGES AND BETWEEN SAID INLET AND SAID OUTLET PRESSURE RELIEF PASSAGE, SAID VALVE MEANS BEING SPRING-BIASED TO A POSITION PERMITTING COMMUNICATION BETWEEN SAID INLET PASSAGE AND SAID OUTLET PASSAGE AND BIASED BY PRESSURE IN SID OUTLET PASSAGE COMMUNICATED THROUGH SAID PRESSURE FEEDBACK PASSAGE TO A POSITION TENDING TO REDUCE COMMUNICATION BETWEEN SAID INLET PASSAGE AND SAID OUTLET PASSAGE, AND HYDRAULICALLY ACTUATED MEANS INCLUDING AN ELEMENT MOVABLE IN RESPONSE TO A PREDETERMINED PRESSURE IN SAID INLET PASSAGE AND OPERATIVELY CONNECTED TO SAID MOVABLE VALVE MEANS FOR TENDING TO MOVE SAID VALVE MEANS TO A POSITION PERMITTING COMMUNICATING BETWEEN SAID OUTLET PASSAGE AND SAID RELIEF PASSAGE WHEN THE PRESSURE IN SAID INLET PASSAGE EXCEEDS SAID PREDETERMINED PRESSURE.
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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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |