Patent US3324741A successfully refreshed from Google Patents.
US3324741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve operator
Assignee: ACF Industries Inc
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Filing: 1965-06-15
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Granted: 1967-06-13
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Expires: 1985-06-15
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:34
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B34/00; E21B34/02; E21B34/04; E21B34/06; E21B34/066; F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/046; F16K31/047; F16K31/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
AN ELECTRICALLY ENERGIZED FAIL-SAFE POWER OPERATOR FOR IMPARTING LONGITUDINAL MOVEMENT TO THE CONTROL STEM OF A MECHANICAL DEVICE, SAID OPERATOR COMPRISING A HOUSING MAINTAINED AGAINST RELATIVE MOVEMENT TO THE MECHANICAL DEVICE, MOTOR DRIVEN MEANS FIXED TO THE HOUSING AND ADAPTED UPON ROTARY MOVEMENT THEREOF TO IMPART LONGITUDINAL MOVEMENT TO THE STEM TO CONTROL SAID MECHANICAL DEVICE, A MECHANICAL SPRING AND SPRING RETAINER DISPOSED WITHIN THE HOUSING AND BEARING ROTATABLY CONNECTED TO SAID MOTOR DRIVE MEANS, ELECTRICALLY ENERGIZED MEANS RETAINING SAID SPRING AND SPRING RETAINER IN A COMPRESSED CONDITION AND ADAPTED UPON DE-ENERGIZATION OF SAID ELECTRICALLY ENERGIZED MEANS FOR RELEASING SAID SPRING AND SPRING RETAINER.
Claim 2
Dependent Claim
104 words
AN ELECTRICALLY ENERGIZED FAIL-SAFE POWER OPERATOR FOR IMPARTING LONGITUDINAL MOVEMENT TO THE CONTROL STEM OF A MECHANICAL DEVICE, SAID OPERATOR COMPRISING A HOUSING MAINTAINED AGAINST RELATIVE MOVEMENT TO THE MECHANICAL DEVICE, MOTOR DRIVEN MEANS FIXED TO THE HOUSING AND ADAPTED UPON ROTARY MOVEMENT THEREOF TO IMPART LONGITUDINAL MOVEMENT TO THE STEM TO CONTROL SAID MECHANICAL DEVICE, A MECHANICAL SPRING AND SPRING RETAINER DISPOSED WITHIN THE HOUSING AND BEARING ROTATABLY CONNECTED TO SAID MOTOR DRIVE MEANS, ELECTRICALLY ENERGIZED MEANS RETAINING SAID SPRING AND SPRING RETAINER IN A COMPRESSED CONDITION AND ADAPTED UPON DE-ENERGIZATION OF SAID ELECTRICALLY ENERGIZED MEANS FOR RELEASING SAID SPRING AND SPRING RETAINER.
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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |