Patent US3147040A successfully refreshed from Google Patents.
US3147040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable chairs
Assignee: Individual
•
Filing: 1960-08-08
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Granted: 1964-09-01
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Expires: 1980-08-08
Abstract
No abstract record available.
Inventors
- 👤 Easterbrook James Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:37
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/20; A47C3/38; A47D; A47D11/00; A47D11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
245 words
A CHAIR COMPRISING A FRAME, A BACKREST AND A SEAT, SAID FRAME INCLUDING A PAIR OF HORIZONTALLY ARRANGED BARS DISPOSED IN FORE AND AFT DIRECTION OF THE CHAIR, A PARALLEL LINK CONNECTION BETWEEN THE HORIZONTAL BARS AND THE SEAT FOR DISPOSING THE SEAT HORIZONTALLY AND SPACED ABOVE SAID BARS AND SO THAT THE SEAT, IN MOVING FROM ONE SPACED POSITION TO ANOTHER, MOVES FOR AND AFT OF THE FRAME, A STRUT COMPRISING A PAIR OF PARALLEL LINKS AND A SUPPORT BAR, EACH OF SAID PAIR OF LINKS BEING PIVOTALLY SECURED AT ONE END TO ONE OF THE HORIZONTAL BARS AND THE UPPER ENDS OF SAID LINKS BEING JOINED BY THE SUPPORT BAR, NOTCHES IN THE SEAT FOR ENGAGEMENT WITH THE SUPPORT BAR TO LOCK THE SEAT IN A DESIRED SPACED POSITION ABOVE THE HORIZONTAL BARS AND A CONSEQUENTIAL FORE AND AFT POSITION RELATIVE TO THE FRAME AND BACKREST, SAID STRUT BEING ANGULARLY DISPOSED RELATIVE TO THE HORIZONTAL BARS IN THE OPPOSITE DIRECTION TO THE PARALLEL LINK CONNECTION THEREBY TO CONSTITUTE A STRUT, A PAIR OF RODS DISPOSED FORE AND AFT OF THE SEAT AND PIVOTALLY SECURED THERETO FOR RECEIVING THE STRUT THEREBETWEEN, BIASING MEANS TO CAUSE SAID RODS NORMALLY TO HOLD THE SUPPORT BAR IN ENGAGEMENT WITH A PAIR OF THE SEAT NOTCHES AND MEANS FOR TURNING SAID RODS ABOUT THEIR PIVOTS AGAINST THE BIASING MEANS TO RELEASE THE STRUT FROM THE NOTCHES WHEN IT IS DESIRED TO MOVE THE SEAT TO ANOTHER HORIZONTAL PLANE.
Claim 2
Dependent Claim
245 words
A CHAIR COMPRISING A FRAME, A BACKREST AND A SEAT, SAID FRAME INCLUDING A PAIR OF HORIZONTALLY ARRANGED BARS DISPOSED IN FORE AND AFT DIRECTION OF THE CHAIR, A PARALLEL LINK CONNECTION BETWEEN THE HORIZONTAL BARS AND THE SEAT FOR DISPOSING THE SEAT HORIZONTALLY AND SPACED ABOVE SAID BARS AND SO THAT THE SEAT, IN MOVING FROM ONE SPACED POSITION TO ANOTHER, MOVES FOR AND AFT OF THE FRAME, A STRUT COMPRISING A PAIR OF PARALLEL LINKS AND A SUPPORT BAR, EACH OF SAID PAIR OF LINKS BEING PIVOTALLY SECURED AT ONE END TO ONE OF THE HORIZONTAL BARS AND THE UPPER ENDS OF SAID LINKS BEING JOINED BY THE SUPPORT BAR, NOTCHES IN THE SEAT FOR ENGAGEMENT WITH THE SUPPORT BAR TO LOCK THE SEAT IN A DESIRED SPACED POSITION ABOVE THE HORIZONTAL BARS AND A CONSEQUENTIAL FORE AND AFT POSITION RELATIVE TO THE FRAME AND BACKREST, SAID STRUT BEING ANGULARLY DISPOSED RELATIVE TO THE HORIZONTAL BARS IN THE OPPOSITE DIRECTION TO THE PARALLEL LINK CONNECTION THEREBY TO CONSTITUTE A STRUT, A PAIR OF RODS DISPOSED FORE AND AFT OF THE SEAT AND PIVOTALLY SECURED THERETO FOR RECEIVING THE STRUT THEREBETWEEN, BIASING MEANS TO CAUSE SAID RODS NORMALLY TO HOLD THE SUPPORT BAR IN ENGAGEMENT WITH A PAIR OF THE SEAT NOTCHES AND MEANS FOR TURNING SAID RODS ABOUT THEIR PIVOTS AGAINST THE BIASING MEANS TO RELEASE THE STRUT FROM THE NOTCHES WHEN IT IS DESIRED TO MOVE THE SEAT TO ANOTHER HORIZONTAL PLANE.
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |