Patent US3199826A successfully refreshed from Google Patents.
US3199826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-return swivel of opposed plate type
Assignee: MIDDLETOWN Manufacturing CO Inc
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Filing: 1964-01-13
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Granted: 1965-08-10
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Expires: 1984-01-13
Abstract
No abstract record available.
Inventors
- 👤 Austin V Miller
- 👤 Howard S Hunt
- 👤 Everett L Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:07
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN A SELF-RETURN SWIVEL OF THE OPPOSED PLATE TYPE WHEREIN THE UPPER PLATE IS VERTICALLY SPACED FROM THE LOWER PLATE AND MOUNTED THEREON FOR HORIZONTAL ROTARY MOVEMEMT ABOUT A VERTICAL AXIS, AN IMPROVED ARRANGEMENT FOR URGING THE ROTARY PLATE TOWARD AND YIELDABLY HOLDING IT IN A NEUTRAL POSITION, COMPRISING: (A) MEANS PROVIDING THE INNER FACES OF SAID LOWER AND UPPER PLATES WITH OPPOSED GROOVES COOPERATIVELY FORMING, BETWEEN SAID PLATES, A LONGITUDINAL PASSAGEWAY WHICH EXTENDS CIRCULARLY ABOUT SAID AXIS; AND (B) MEANS URGING SAID ROTARY PLATE TOWARD, AND YIELDABLY HOLDING IT IN ITS NEUTRAL POSITION, SAID MEANS INCLUDING (1) AN ELONGATED HELICAL SPRING EXTENDING LONGITUDINALLY IN AND ALONG SAID CIRCULAR PASSAGEWAY, (2) SPRING-STOPPING MEANS (A) PROVIDING A PAIR OF STATIONARY ABUTMENTSD MOUNTED ON THE LOWER STATIONARY PLATE, ONE TO ABUT ONE END OF SAID SPRING AND THE OTHER TO ABUT THE OTHER END THEREOF, AND
Claim 2
Dependent Claim
144 words
IN A SELF-RETURN SWIVEL OF THE OPPOSED PLATE TYPE WHEREIN THE UPPER PLATE IS VERTICALLY SPACED FROM THE LOWER PLATE AND MOUNTED THEREON FOR HORIZONTAL ROTARY MOVEMEMT ABOUT A VERTICAL AXIS, AN IMPROVED ARRANGEMENT FOR URGING THE ROTARY PLATE TOWARD AND YIELDABLY HOLDING IT IN A NEUTRAL POSITION, COMPRISING: (A) MEANS PROVIDING THE INNER FACES OF SAID LOWER AND UPPER PLATES WITH OPPOSED GROOVES COOPERATIVELY FORMING, BETWEEN SAID PLATES, A LONGITUDINAL PASSAGEWAY WHICH EXTENDS CIRCULARLY ABOUT SAID AXIS; AND (B) MEANS URGING SAID ROTARY PLATE TOWARD, AND YIELDABLY HOLDING IT IN ITS NEUTRAL POSITION, SAID MEANS INCLUDING (1) AN ELONGATED HELICAL SPRING EXTENDING LONGITUDINALLY IN AND ALONG SAID CIRCULAR PASSAGEWAY, (2) SPRING-STOPPING MEANS (A) PROVIDING A PAIR OF STATIONARY ABUTMENTSD MOUNTED ON THE LOWER STATIONARY PLATE, ONE TO ABUT ONE END OF SAID SPRING AND THE OTHER TO ABUT THE OTHER END THEREOF, AND
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US2329697A
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US2413455A
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US2691407A
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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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |