US3201942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed surge tank
Assignee: Individual
•
Filing: 1961-10-06
•
Granted: 1965-08-24
•
Expires: 1981-10-06
Abstract
No abstract record available.
Inventors
- 👤 Yamamoto Hiroji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:55
CPC Classifications
E; E02; E02B; E02B9/00; E02B9/02; E02B9/06; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3115; Y10T137/3118; Y10T137/3584; Y10T137/36; Y10T137/8593; Y10T137/86381
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A HYDRAULIC SURGE TANK, COMPRISING A CHAMBER COMMUNICATING WITH A HYDRAULIC LINE CARRYING A FLUID UNDER PRESSURE, SAID LINE BEING SUBJECT TO SUDDEN FLUID SURGES OWING TO QUICK INCREASE AND DECREASE OF SAID PRESSURE, A COVER FOR CLOSING SAID CHAMBER IN A FLUID-TIGHT MANNER, SAID CHAMBER BEING PARTLY FILLED WITH SAID FLUID, AND A TWOWAY RELIEF AIR VALVE IN SAID COVER, SAID VALVE BEING CONTINUALLY OPEN UNDER NORMAL CIRCUMSTANCES OF USE SO AS TO COMMUNICATE WITH THE SPACE WITHIN SAID CHAMBER AND WITH THE ATMOSPHERE, AND BEING SET TO A PREDETERMINED PRESSURE LOWER THAN THAT TO WHICH SAID LINE MAY BE SUBJECTED, WHEREBY SAID SURGES ARE EFFECTIVELY DAMPENED BY A PNEUMATIC BRAKING EFFECT RESULTING FROM A CONTROLED AMOUNT OF AIR WHICH PASSES OUTWARD AND INWARD, RESPECTIVELY, THROUGH SAID VALVE DURING THE USE OF THE SURGE TANK, DEPENDING ON THE DIRECTION AND AMOUNT OF SAID SURGES.
Claim 2
Dependent Claim
145 words
A HYDRAULIC SURGE TANK, COMPRISING A CHAMBER COMMUNICATING WITH A HYDRAULIC LINE CARRYING A FLUID UNDER PRESSURE, SAID LINE BEING SUBJECT TO SUDDEN FLUID SURGES OWING TO QUICK INCREASE AND DECREASE OF SAID PRESSURE, A COVER FOR CLOSING SAID CHAMBER IN A FLUID-TIGHT MANNER, SAID CHAMBER BEING PARTLY FILLED WITH SAID FLUID, AND A TWOWAY RELIEF AIR VALVE IN SAID COVER, SAID VALVE BEING CONTINUALLY OPEN UNDER NORMAL CIRCUMSTANCES OF USE SO AS TO COMMUNICATE WITH THE SPACE WITHIN SAID CHAMBER AND WITH THE ATMOSPHERE, AND BEING SET TO A PREDETERMINED PRESSURE LOWER THAN THAT TO WHICH SAID LINE MAY BE SUBJECTED, WHEREBY SAID SURGES ARE EFFECTIVELY DAMPENED BY A PNEUMATIC BRAKING EFFECT RESULTING FROM A CONTROLED AMOUNT OF AIR WHICH PASSES OUTWARD AND INWARD, RESPECTIVELY, THROUGH SAID VALVE DURING THE USE OF THE SURGE TANK, DEPENDING ON THE DIRECTION AND AMOUNT OF SAID SURGES.
References Cited (Backward Citations)
DE292940C
Cited
USRE18969E
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US962355A
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US973183A
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US1549260A
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US1705089A
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US1689947A
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US1863728A
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US2271480A
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US2416025A
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |