US3319923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-hydraulic blowout preventer
Assignee: Shell USA Inc
•
Filing: 1965-07-16
•
Granted: 1967-05-16
•
Expires: 1985-07-16
Abstract
No abstract record available.
Inventors
- 👤 John A Haeber
- 👤 Kenneth W Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:09
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B33/0355; E21B33/06; E21B33/064; F15B2211/00; F15B2211/70; F15B2211/71; F15B2211/80; F15B2211/875; F15B2211/8757
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A BLOWOUT PREVENTER COMPRISING (A) A HOLLOW BODY MEMBER HAVING ALIGNED PIPE OPENINGS IN ONE PAIR OF OPPOSITE WALLS TO PROVIDE A PIPE PASSAGE THERETHROUGH, (B) AT LEAST A PAIR OF OPPOSITELY-ARRANGED SEALING RAMS MOVABLE TOWARD AND AWAY FROM THE CENTRAL AXIS OF SAID PIPE PASSAGE, (C) SEALING MEANS CARRIED ON THE TERMINAL ADJACENT PORTIONS OF SAID RAM MEANS, (D) ACTUATING LINKAGE MEANS CONNECTED TO EACH OF SAID RAMS, (E) ELECTRICAL MOTOR MEANS CARRIED IN FIXED RELATION TO SAID BODY MEMBER AND BEING OPERATIVELY CONNECTED TO SAID ACTUATING LINKAGE MEANS, AND (F) CIRCUIT MEANS FOR SAID MOTOR MEANS, SAID CIRCUIT MEANS INCLUDING VARIABLE VOLTAGE MEANS POSITIONED REMOTELY OF SAID MOTOR MEANS FOR SELECTIVELY VARYING THE THRUST OF SAID RAMS AT LEAST IN THEIR CLOSED POSITION.
Claim 2
Dependent Claim
125 words
A BLOWOUT PREVENTER COMPRISING (A) A HOLLOW BODY MEMBER HAVING ALIGNED PIPE OPENINGS IN ONE PAIR OF OPPOSITE WALLS TO PROVIDE A PIPE PASSAGE THERETHROUGH, (B) AT LEAST A PAIR OF OPPOSITELY-ARRANGED SEALING RAMS MOVABLE TOWARD AND AWAY FROM THE CENTRAL AXIS OF SAID PIPE PASSAGE, (C) SEALING MEANS CARRIED ON THE TERMINAL ADJACENT PORTIONS OF SAID RAM MEANS, (D) ACTUATING LINKAGE MEANS CONNECTED TO EACH OF SAID RAMS, (E) ELECTRICAL MOTOR MEANS CARRIED IN FIXED RELATION TO SAID BODY MEMBER AND BEING OPERATIVELY CONNECTED TO SAID ACTUATING LINKAGE MEANS, AND (F) CIRCUIT MEANS FOR SAID MOTOR MEANS, SAID CIRCUIT MEANS INCLUDING VARIABLE VOLTAGE MEANS POSITIONED REMOTELY OF SAID MOTOR MEANS FOR SELECTIVELY VARYING THE THRUST OF SAID RAMS AT LEAST IN THEIR CLOSED POSITION.
References Cited (Backward Citations)
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Cited
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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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |