Patent US3778014A successfully refreshed from Google Patents.
US3778014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair base swivel arrangement
Assignee: All Steel Equipment Inc
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Filing: 1971-07-26
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Granted: 1973-12-11
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Expires: 1991-07-26
Abstract
Abstract A chair base swivel arrangement comprising a tubular member supported in upright position from a chair base and carrying at its upper end an axially split O-shaped bearing element of antifriction material that is engaged by a sintered swivel member on which the chair base nut or hand wheel rests. The bearing element seats of the tubular member and swivel member are of complemental semi-torus configuration relative to the bearing element peripheral surface, with the tubular member seat engaging the lower radially outer quadrant of the bearing element and the swivel member seat engaging the upper radially inner quadrant of the bearing element.
Inventors
- 👤 D Beaver
- 👤 R Driscoll
- 👤 J Lannert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:49
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/002; A47C7/004
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
378 words
A chair base swivel arrangement comprising: a base structure incLuding an upright tubular member carrying an annular bearing seat at its upper end, a one piece bearing element of anchor ring configuration and formed from antifriction material seated on said seat in substantial concentric relation therewith, a swivel member seated on said bearing element and including a bearing seat engaging said bearing element, said seats and said element lying in substantially parallel planes that are substantially normal to the axes thereof, a chair seat having a threaded spindle received in said tubular member, a nut removably seated on said swivel member and threadedly engaged with said spindle, means for keying said swivel member against rotational movement relative to said spindle, and means for releasably keying said nut to said swivel member, said bearing seats defining substantially continuous and uninterrupted bearing surfaces for engaging said bearing element that substntially complement the surface portions thereof that are engaged thereby, said tubular member seat engaging the lower outer quadrant of said bearing element surface, and said swivel member seat engaging the inner upper quadrant of said bearing element surface, said bearing element being interrupted to define two end portions in closely spaced relation whereby when said bearing element is engaged by said bearing seats said bearing element is biased into conformity therewith, a post structure in which said tubular member is received and a plurality of leg elements fixed to and extending laterally of said post structure, said post structure comprising: an inner shell to which said leg elements are fixed, an outer shell received over said inner shell in substantial concentric relation therewith and receiving said leg elements, said tubular member extending through said inner shell at either end of the latter, a cap closing off said tubular member at the lower end of same, and means for fixing said tubular member to said inner shell at the lower end of same, a starred washer applied to the upper end of said inner shell and within said outer shell, said washer including triangular projections of equal radial lengths spaced thereabout engaging said outer shell, and a collar applied between said tubular member seat and said washer for supporting said tubular member seat on the upper end of said inner shell.
Claim 2
Dependent Claim
378 words
A chair base swivel arrangement comprising: a base structure incLuding an upright tubular member carrying an annular bearing seat at its upper end, a one piece bearing element of anchor ring configuration and formed from antifriction material seated on said seat in substantial concentric relation therewith, a swivel member seated on said bearing element and including a bearing seat engaging said bearing element, said seats and said element lying in substantially parallel planes that are substantially normal to the axes thereof, a chair seat having a threaded spindle received in said tubular member, a nut removably seated on said swivel member and threadedly engaged with said spindle, means for keying said swivel member against rotational movement relative to said spindle, and means for releasably keying said nut to said swivel member, said bearing seats defining substantially continuous and uninterrupted bearing surfaces for engaging said bearing element that substntially complement the surface portions thereof that are engaged thereby, said tubular member seat engaging the lower outer quadrant of said bearing element surface, and said swivel member seat engaging the inner upper quadrant of said bearing element surface, said bearing element being interrupted to define two end portions in closely spaced relation whereby when said bearing element is engaged by said bearing seats said bearing element is biased into conformity therewith, a post structure in which said tubular member is received and a plurality of leg elements fixed to and extending laterally of said post structure, said post structure comprising: an inner shell to which said leg elements are fixed, an outer shell received over said inner shell in substantial concentric relation therewith and receiving said leg elements, said tubular member extending through said inner shell at either end of the latter, a cap closing off said tubular member at the lower end of same, and means for fixing said tubular member to said inner shell at the lower end of same, a starred washer applied to the upper end of said inner shell and within said outer shell, said washer including triangular projections of equal radial lengths spaced thereabout engaging said outer shell, and a collar applied between said tubular member seat and said washer for supporting said tubular member seat on the upper end of said inner shell.
Claim 3
Dependent Claim
17 words
The swivel arrangement set forth in claim 1 wherein: said tubular member bearing seat is integral therewith.
Claim 4
Dependent Claim
41 words
The swivel arrangement set forth in claim 1 wherein: said tubular member seat comprises: a hub member received on the upper end of said tubular member, said hub member including said collar and being formed to define said tubular member seat.
Claim 5
Dependent Claim
46 words
The swivel arrangement set forth in claim 1 wherein: said nut includes a skirt depending therefrom disposed in masking relation about said tubular member bearing seat and said collar, said nut skirt and said outer shell being of substantially equal diameters and being in coaxial relation.
Claim 6
Dependent Claim
331 words
A chair base swivel arrangement comprising: a base structure including an upright tubular member carrying an annular bearing seat at its upper end, a one piece bearing element of anchor ring configuration and formed from antifriction material seated on said seat in substantial concentric relation therewith, a swivel member seated on said bearing element and including a bearing seat engaging said bearing element, said seats and said element lying in substantially parallel planes that are substantially normal to the axes thereof, a chair seat having a threaded spindle received in said tubular member, a nut removably seated on said swivel member and threadedly engaged with said spindle, means for keying said swivel member against rotational movement relative to said spindle, and means for releasably keying said nut to said swivel member, said bearing seats defining substantially continuous and uninterrupted bearing surfaces for engaging said bearing element that substantially complement the surface portions thereof that are engaged thereby, said tubular member seat engaging the lower outer quadrant of said bearing element surface, and said swivel member seat engaging the inner upper quadrant of said bearing element surface, a post structure in which said tubular membber is received and a plurality of leg elements fixed to and extending laterally of said post structure, said post structure comprising: an inner shell to which said leg elements are fixed, an outer shell received over said inner shell in substantial concentric relation therewith and receiving said leg elements, said tubular member extending through said inner shell at either end of the latter, and means for fixing said tubular member to said inner shell at the lower end of same, a starred washer applied to the upper end of said inner shell and within said outer shell, said washer including projections of equal radial lengths spaced thereabout said outer shell, and an annular support applied between said tubular member seat and said washer for supporting said tubular member seat on the upper end of said inner shell.
Claim 7
Dependent Claim
331 words
A chair base swivel arrangement comprising: a base structure including an upright tubular member carrying an annular bearing seat at its upper end, a one piece bearing element of anchor ring configuration and formed from antifriction material seated on said seat in substantial concentric relation therewith, a swivel member seated on said bearing element and including a bearing seat engaging said bearing element, said seats and said element lying in substantially parallel planes that are substantially normal to the axes thereof, a chair seat having a threaded spindle received in said tubular member, a nut removably seated on said swivel member and threadedly engaged with said spindle, means for keying said swivel member against rotational movement relative to said spindle, and means for releasably keying said nut to said swivel member, said bearing seats defining substantially continuous and uninterrupted bearing surfaces for engaging said bearing element that substantially complement the surface portions thereof that are engaged thereby, said tubular member seat engaging the lower outer quadrant of said bearing element surface, and said swivel member seat engaging the inner upper quadrant of said bearing element surface, a post structure in which said tubular membber is received and a plurality of leg elements fixed to and extending laterally of said post structure, said post structure comprising: an inner shell to which said leg elements are fixed, an outer shell received over said inner shell in substantial concentric relation therewith and receiving said leg elements, said tubular member extending through said inner shell at either end of the latter, and means for fixing said tubular member to said inner shell at the lower end of same, a starred washer applied to the upper end of said inner shell and within said outer shell, said washer including projections of equal radial lengths spaced thereabout said outer shell, and an annular support applied between said tubular member seat and said washer for supporting said tubular member seat on the upper end of said inner shell.
Claim 8
Dependent Claim
341 words
In a swivel arrangement for chair bases of the type supporting a chair seat spindle, having a threaded portion, from a base structure, in which the swivel arrangement includes a tubular member receiving the spindle, means supporting said tubular member in upright position from said base structure, said tubular member having an upwardly facing annular bearing seat at its upper end, a bearing means seated on said bearing seat in substantial concentric relation therewith, a swivel member seated on said bearing means and including a downwardly facing annular bearing seat engaging said bearing means, a nut removably seated on said swivel member and including internal threading for threaded connection with the spindle threaded portion for supporting the latter on said tubular member, means for releasably keying said nut to said swivel member, and means for keying said swivel member against rotational movement relative to the spindle, the improvement wherein: said bearing means comprises a one piece torus shaped element formed from antifriction material and having a torus shaped external surface, with said bearing element being free of keying connection to said spindle and to said seats, said bearing seats each being of concave semitorus configuration substantially complementing the configuration of the surface portions of said bearing element they engage and each being proportioned to engage approximately an annular quadrant of said external surface of said bearing element, said bearing seats and said bearing element being spaced laterally of and about said spindle, said tubular member seat engaging the lower outer quadrant of said bearing element surface, and said swivel member seat engaging the inner upper quadrant of said bearing element surface and being shaped to shield said bearing element from said spindle threaded portion, whereby said swivel member seat and said bearing element define a first normally operative slip surface therebetween and said bearing element and said tubular member seat define a second contingency slip surface therebetween of greater area than said first slip surface, and whereby said seats and said bearing element are in vertical and radial thrust transmitting relation.
Claim 9
Dependent Claim
341 words
In a swivel arrangement for chair bases of the type supporting a chair seat spindle, having a threaded portion, from a base structure, in which the swivel arrangement includes a tubular member receiving the spindle, means supporting said tubular member in upright position from said base structure, said tubular member having an upwardly facing annular bearing seat at its upper end, a bearing means seated on said bearing seat in substantial concentric relation therewith, a swivel member seated on said bearing means and including a downwardly facing annular bearing seat engaging said bearing means, a nut removably seated on said swivel member and including internal threading for threaded connection with the spindle threaded portion for supporting the latter on said tubular member, means for releasably keying said nut to said swivel member, and means for keying said swivel member against rotational movement relative to the spindle, the improvement wherein: said bearing means comprises a one piece torus shaped element formed from antifriction material and having a torus shaped external surface, with said bearing element being free of keying connection to said spindle and to said seats, said bearing seats each being of concave semitorus configuration substantially complementing the configuration of the surface portions of said bearing element they engage and each being proportioned to engage approximately an annular quadrant of said external surface of said bearing element, said bearing seats and said bearing element being spaced laterally of and about said spindle, said tubular member seat engaging the lower outer quadrant of said bearing element surface, and said swivel member seat engaging the inner upper quadrant of said bearing element surface and being shaped to shield said bearing element from said spindle threaded portion, whereby said swivel member seat and said bearing element define a first normally operative slip surface therebetween and said bearing element and said tubular member seat define a second contingency slip surface therebetween of greater area than said first slip surface, and whereby said seats and said bearing element are in vertical and radial thrust transmitting relation.
Claim 10
Dependent Claim
48 words
The improvement set forth in claim 6 wherein: said bearing element is split axially thereof to define two opposed end portions in closely spaced relation, said bearing element being free to flex laterally thereof whereby said seats cam said element into centered relation therewith to accommodate tolerance variations.
Claim 11
Dependent Claim
158 words
The improvement set forth in claim 6 wherein said base structure comprises: a post structure in which said tubular member is received and a plurality of leg elements fixed to and extending laterally of said post structure, said post structure comprising: an inner shell to which said leg elements are fixed, an outer shell received over said inner shell in substantial concentric relation therewith and receiving said leg elements, said tubular member extending through said inner shell at either end of the latter, and means for fixing said tubular member to said inner shell at the lower end of same, a starred washer applied to the upper end of said inner shell and within said outer shell, said washer including projections of equal radial lengths spaced thereabout engaging said outer shell, and an annular support applied between said tubular member seat and said washer for supporting said tubular member seat on the upper end of said inner shell.
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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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |