US3351379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chairs
Assignee: Tan Sad Chair Co 1931 Ltd
•
Filing: 1966-02-01
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Granted: 1967-11-07
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Expires: 1986-02-01
Abstract
Abstract 1,124,241. Adjustable seats. TAN-SAD CHAIR CO. (1931) Ltd. 27 Jan., 1966 [13 Feb., 1965], No. 6342/65. Heading A4J. Bolt 17 retains back rest 4, of an office chair, in its adjusted position and can be unscrewed to allow the rest to be altered in height and inclination. Spring 23 separates serrations 8 from those on a complementary cylindrical surface 12, thus allowing bolt 17 and the assembly 4, 5, 6 and 15 to be swung about the axis of cylindrical nut 20, which is journalled in seat frame 3. Slot 19 allows stem 5 to be slid vertically. U-shaped clamping. member 15 grips stem 5, on re-tightening bolt 17.
Inventors
- 👤 Street Leslie John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:48
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/022; A47C1/024; A47C1/026; A47C1/027; A47C7/00; A47C7/36; A47C7/40; A47C7/402
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A CHAIR FOR TYPISTS AND THE LIKE COMPRISING SEAT AND BACK-REST ASSEMBLIES SECURED TOGETHER THROUGH ADJUSTING MEANS INCLUDING A BLOCK, COMPLEMENTARY SURFACES ON THE BLOCK AND SEAT ASSEMBLY CAPABLE OF SELECTIVE LOCKED ENGAGEMENT TO DETERMINE THE ANGULAR POSITION OF THE BLOCK ABOUT A HORIZONTAL AXIS, A DEPENDANT STEM OF THE SEAT ASSEMBLY SLIDABLY CONNECTED TO THE BLOCK, A BOLT PASSING THROUGH A VERTICALLY ELONGATED SLOT IN THE STEM AND THROUGH THE BLOCK IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE COMPLEMENTARY SURFACES, AND COACTING MEANS ON SAID BOLT AND SAID SEAT ASSEMBLY PROVIDING A COMBINED PIVOTAL AND THREADED CONNECTION THEREBETWEEN WHEREBY ROTATION OF SAID BOLT IN ONE DIRECTION ENABLES SAID COMPLEMENTARY SURFACES TO BE RELEASED AND PERMITS SAID BLOCK AND BOLT TO SWING TOGETHER ABOUT SAID CONNECTION ANGULARLY RELATIVE TO THE SEAT ASSEMBLY, AND ROTATION OF THE BOLT IN THE OPPOSITE DIRECTION SERVES SIMULTANEOUSLY TO CLAMP THE BLOCK TO THE SEAT ASSEMBLY IN THE SELECTED ANGULAR POSITION AND TO CLAMP THE STEM AGAINST THE BLOCK AT A SELECTED HEIGHT IN RELATION TO THE SEAT ASSEMBLY.
Claim 2
Dependent Claim
174 words
A CHAIR FOR TYPISTS AND THE LIKE COMPRISING SEAT AND BACK-REST ASSEMBLIES SECURED TOGETHER THROUGH ADJUSTING MEANS INCLUDING A BLOCK, COMPLEMENTARY SURFACES ON THE BLOCK AND SEAT ASSEMBLY CAPABLE OF SELECTIVE LOCKED ENGAGEMENT TO DETERMINE THE ANGULAR POSITION OF THE BLOCK ABOUT A HORIZONTAL AXIS, A DEPENDANT STEM OF THE SEAT ASSEMBLY SLIDABLY CONNECTED TO THE BLOCK, A BOLT PASSING THROUGH A VERTICALLY ELONGATED SLOT IN THE STEM AND THROUGH THE BLOCK IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE COMPLEMENTARY SURFACES, AND COACTING MEANS ON SAID BOLT AND SAID SEAT ASSEMBLY PROVIDING A COMBINED PIVOTAL AND THREADED CONNECTION THEREBETWEEN WHEREBY ROTATION OF SAID BOLT IN ONE DIRECTION ENABLES SAID COMPLEMENTARY SURFACES TO BE RELEASED AND PERMITS SAID BLOCK AND BOLT TO SWING TOGETHER ABOUT SAID CONNECTION ANGULARLY RELATIVE TO THE SEAT ASSEMBLY, AND ROTATION OF THE BOLT IN THE OPPOSITE DIRECTION SERVES SIMULTANEOUSLY TO CLAMP THE BLOCK TO THE SEAT ASSEMBLY IN THE SELECTED ANGULAR POSITION AND TO CLAMP THE STEM AGAINST THE BLOCK AT A SELECTED HEIGHT IN RELATION TO THE SEAT ASSEMBLY.
References Cited (Backward Citations)
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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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |