Patent US4378173A successfully refreshed from Google Patents.
US4378173A
Expired / Lapsed
US
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Structural joints
Assignee: Linvar Ltd
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Filing: 1980-09-29
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Granted: 1983-03-29
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Expires: 2000-09-29
Abstract
Abstract A structural joint suitable for a frame member for furniture, e.g. a leg for a work bench, comprises two tubular members 10, 11 slidable one inside the other. Each member 10, 11 has a longitudinal slot 13 through which a wing nut 16 is passable. The members are secured by engaging a screw 17 in the nut 16 which is so long that it cannot fully rotate inside the inner member 11. Preferably, the slot 13 has enlarged portions 14 which alone can pass a boss of the nut 16.
Inventors
- 👤 Ernest E. Hopwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:43
CPC Classifications
F; F16; F16B; F16B12/00; F16B12/10; F16B12/28; F16B12/32; F16B37/00; F16B37/16; F16B7/00; F16B7/10; F16B7/105; F16B7/14; A; A47; A47B; A47B37/00; A47B2037/005; A47B2230/00; A47B2230/0003; A47B2230/0018; A47B2230/0025; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451; Y10T403/32459
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
99 words
A structural joint comprising an outer tubular member, an inner tubular member fitting and longitudinally slidable inside the outer member, a registering longitudinal slot in each member, a wing nut passable through the slots and long enough to be not fully rotatable inside the inner member, and a screw engageable in the nut and having a head bearing on the edges of the outer member for securing the members together, the tubular members have a transverse section which is generally square with one corner cut off to provide an inclined face and the longitudinal slots are in that face.
Claim 2
Dependent Claim
99 words
A structural joint comprising an outer tubular member, an inner tubular member fitting and longitudinally slidable inside the outer member, a registering longitudinal slot in each member, a wing nut passable through the slots and long enough to be not fully rotatable inside the inner member, and a screw engageable in the nut and having a head bearing on the edges of the outer member for securing the members together, the tubular members have a transverse section which is generally square with one corner cut off to provide an inclined face and the longitudinal slots are in that face.
Claim 3
Dependent Claim
33 words
A structural joint according to claim 1 in which the slots in the tubular members have a number of enlarged portions and the wing nut comprises a boss passable through such enlarged portions.
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) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |