US3304952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vent control device
Assignee: Individual
•
Filing: 1965-03-15
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Granted: 1967-02-21
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Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Howard C Krone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:19
CPC Classifications
B; B60; B60K; B60K15/00; B60K15/03; B60K15/04; B60K15/0406; B60P; B60P3/00; B60P3/22; B60P3/224; B60P3/2255; F; F16; F16K; F16K15/00; F16K15/14; F16K15/148; F16K17/00; F16K17/18; F16K17/19; F16K2200/00; F16K2200/30; F16K2200/305; F16K2200/3053; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/778; Y10T137/7837; Y10T137/7838; Y10T137/7841; Y10T137/7879; Y10T137/7888; Y10T137/789
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A VENT CONTROL DEVICE FOR FLAMMABLE LIQUID STORAGE RECEPTACLES COMPRISING, (A) A VENT HOUSING FOR CONNECTION TO A RECEPTACLE AND HAVING A PASSAGE WITH A BOTTOM OPENING IN COMMUNICATION WITH A RECEPTACLE INTERIOR AND TOP OPENING TO THE ATMOSPHERE, (B) AN UPWARDLY FACING SEAT SURROUNDING SAID PASSAGE AND SPACED FROM SAID BOTTOM OPENING, (C) A PRESSURE-RESPONSIVE RELIEF VALVE MEMBER MOVABLY GUIDED IN SAID HOUSING AND BIASED INTO SEATING ENGAGEMENT WITH SAID SEAT, (D) SAID PRESSURE-RESPONSIVE RELIEF VALVE MEMBER HAVING AN INNER CHAMBER WITH A BOTTOM OPENING IN COMMUNICATION WITH SAID PASSAGE BELOW SAID UPWARDLY FACING SEAT AND TOP PORTS COMMUNICATING WITH THE PASSAGE ABOVE SAID UPWARDLY FACING SEAT, (E) VALVE MEANS NORMALLY CLOSING SAID PORTS, (F) AND A FLOW-RESPONSIVE SPILL-PREVENTION VALVE ENGAGEABLE WITH THE VALVE MEMBER AROUND SAID BOTTOM OPENING THEREOF AND NORMALLY SUSTAINED AWAY THEREFROM FOR SUBSTANTIALLY UNIMPEDED LOW RATE FLOW THEREABOUT.
Claim 2
Dependent Claim
143 words
A VENT CONTROL DEVICE FOR FLAMMABLE LIQUID STORAGE RECEPTACLES COMPRISING, (A) A VENT HOUSING FOR CONNECTION TO A RECEPTACLE AND HAVING A PASSAGE WITH A BOTTOM OPENING IN COMMUNICATION WITH A RECEPTACLE INTERIOR AND TOP OPENING TO THE ATMOSPHERE, (B) AN UPWARDLY FACING SEAT SURROUNDING SAID PASSAGE AND SPACED FROM SAID BOTTOM OPENING, (C) A PRESSURE-RESPONSIVE RELIEF VALVE MEMBER MOVABLY GUIDED IN SAID HOUSING AND BIASED INTO SEATING ENGAGEMENT WITH SAID SEAT, (D) SAID PRESSURE-RESPONSIVE RELIEF VALVE MEMBER HAVING AN INNER CHAMBER WITH A BOTTOM OPENING IN COMMUNICATION WITH SAID PASSAGE BELOW SAID UPWARDLY FACING SEAT AND TOP PORTS COMMUNICATING WITH THE PASSAGE ABOVE SAID UPWARDLY FACING SEAT, (E) VALVE MEANS NORMALLY CLOSING SAID PORTS, (F) AND A FLOW-RESPONSIVE SPILL-PREVENTION VALVE ENGAGEABLE WITH THE VALVE MEMBER AROUND SAID BOTTOM OPENING THEREOF AND NORMALLY SUSTAINED AWAY THEREFROM FOR SUBSTANTIALLY UNIMPEDED LOW RATE FLOW THEREABOUT.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |