US3926531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Builders scaffolding
Assignee: C Evans and Sons Ltd
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Filing: 1974-08-08
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Granted: 1975-12-16
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Expires: 1994-08-08
Abstract
Abstract A standard for builders scaffolding having a head fitting for use in coupling two standards together in end-to-end relationship, said head fitting comprising a male adapter element, and a bracket member which is formed at its ends to engage and be fixed to the standard, said bracket also being formed with a projecting slot in which is received a wedge element which, in use, engages and retains in position the adjacent end of said two standards.
Inventors
- 👤 Peter Eric Gostling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:17
CPC Classifications
E; E04; E04G; E04G7/00; E04G7/30; E04G7/301; Y; Y10; Y10T; Y10T403/00; Y10T403/55; Y10T403/551; Y10T403/66; Y10T403/70; Y10T403/7062; Y10T403/7064
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
193 words
A standard for builders scaffolding which comprises a length of tube having one plain end and a head fitting fixedly secured to the other end thereof, said head fitting being adapted to receive the plain end of a second length of tube to join said tube and said second tube together in end-to-end relationship with one another, and wherein said head fitting comprises a male adaptor element fixed in and projecting coaxially from said other end of said tube to be received in said plain end of said second tube, a bracket member secured to said tube in overlapping relationship with said other end of said tube, said bracket member being formed with a narrow open slot extending radially outwards from said tube, and a wedge element positioned, and held captive, in said open slot so that, in use, said wedge element is movable between an inoperative position where one side edge thereof is spaced from the outer peripheries of said tube and said second tube being joined, and an operative position where said one side edge thereof is in direct engagement with said outer peripheries of said tube and said second tube.
Claim 2
Dependent Claim
193 words
A standard for builders scaffolding which comprises a length of tube having one plain end and a head fitting fixedly secured to the other end thereof, said head fitting being adapted to receive the plain end of a second length of tube to join said tube and said second tube together in end-to-end relationship with one another, and wherein said head fitting comprises a male adaptor element fixed in and projecting coaxially from said other end of said tube to be received in said plain end of said second tube, a bracket member secured to said tube in overlapping relationship with said other end of said tube, said bracket member being formed with a narrow open slot extending radially outwards from said tube, and a wedge element positioned, and held captive, in said open slot so that, in use, said wedge element is movable between an inoperative position where one side edge thereof is spaced from the outer peripheries of said tube and said second tube being joined, and an operative position where said one side edge thereof is in direct engagement with said outer peripheries of said tube and said second tube.
Claim 3
Dependent Claim
40 words
A standard as claimed in claim 1, in which said bracket member comprises a strip of metal which is bent to present said narrow open slot and a pair of arcuate arms which closely fit, and wrap round, said tube.
Claim 4
Dependent Claim
35 words
A standard as claimed in claim 2, in which said wedge element comprises a flat rectangular plate having an angled closed-ended slot, said slot having received therein a pin extending transversely through said open slot.
Claim 5
Dependent Claim
64 words
A standard as claimed in claim 3, in which the position of said pin is such that, in the operative position, one side edge of said wedge element is urged into engagement with the outer peripheries of two of said standards being joined, and in the inoperative position, the opposite side edge of said wedge element is urged into engagement with said bracket member.
Claim 6
Dependent Claim
45 words
A standard as claimed in claim 4, in which radially extending channel members are fixed to said standard to receive ledgers or transoms, and wherein the plane of said open slot of said bracket lies at an angle to the plane of said channel members.
References Cited (Backward Citations)
US2696649A
Cited
US3707304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |