US3881829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connections between structural components
Assignee: Dexion Comino International Ltd
•
Filing: 1973-11-27
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Granted: 1975-05-06
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Expires: 1993-11-27
Abstract
Abstract The invention concerns locking means for a connection between structural components in which a projecting part for effecting locking by engaging through holes in connected components is adapted for fracturing under a predetermined loading in two stages or at two locations and in such a manner as too indicate visibly that failure of the locking means has occurred. Advantageously the locking part is of a U-shape and arranged to fracture near the roots of the limbs of that shape. The failure indication may be given by a plate or disc arranged so that it will fall away in the event of fracture of the locking part.
Inventors
- 👤 John Brian James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:18
CPC Classifications
A; A47; A47B; A47B57/00; A47B57/30; A47B57/40; A47B57/408; F; F16; F16B; F16B2200/00; F16B2200/20; F16B2200/205; F16B2200/63; F16B2200/69; Y; Y10; Y10T; Y10T403/00; Y10T403/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
Locking means for interconnecting structural members comprising in combination: means on a first of said members detachably engaging a recess in another of said members for supporting a load acting between said members in a predetermined direction, a U-shaped projecting member formed of a frangible material on one of said members and detachably engaging with a cooperating means on the other of said members, said cooperating means exerting a force against the legs of said U-shaped member acting in a direction tending to bend at least one leg portion thereof against the other, whereby at least one leg portion of said U-shaped member fractures.
Claim 2
Dependent Claim
104 words
Locking means for interconnecting structural members comprising in combination: means on a first of said members detachably engaging a recess in another of said members for supporting a load acting between said members in a predetermined direction, a U-shaped projecting member formed of a frangible material on one of said members and detachably engaging with a cooperating means on the other of said members, said cooperating means exerting a force against the legs of said U-shaped member acting in a direction tending to bend at least one leg portion thereof against the other, whereby at least one leg portion of said U-shaped member fractures.
Claim 3
Dependent Claim
28 words
The locking means of claim 1 wherein said leg portion which fractures falls away, and means providing a visible indication that said fractured leg portion has fallen away.
Claim 4
Dependent Claim
33 words
Locking means according to claim 1 and further comprising a supporting and locating part attachable to one of the structural components for loading said locked part, supported by it, towards the locking position.
Claim 5
Dependent Claim
47 words
Locking means according to claiM 1 and further comprising a supporting and locating part attachable to one of the structural components and adapted for loading the said projecting member, while supported by it, towards the locking position, said projecting member being connected detachably to said supporting part.
Claim 6
Dependent Claim
58 words
Locking means according to claim 1, said projecting member including first and second limbs and being attached to said supporting part by an upstanding plate connected to said first upper limb of said U-shaped projecting member and interengaged detachably with the supporting part, a failure-indicating element being connected to said second lower limb of said U-shaped projecting member.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |