US3964575A
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: 1976-06-22
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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
2026-10-29 08:40
CPC Classifications
E; E04; E04G; E04G5/00; E04G5/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
A base jack for the standards of a scaffold structure, which comprises a tube having a plurality of spaced transverse holes, a support bracket slidable lengthwise of said tube and having a transverse hole arranged to coincide with any one of said holes in said tube, said support bracket comprising a metal strip which is shaped to present a box-like projection, the free ends of said strip being of arcuate formation to closely fit around said tube and to be fixed to said tube, a locking pin provided to extend through said coincident holes in said bracket and said tube, and a base plate supporting a screw-threaded rod which is in threaded engagement with one end of said tube, the other end of said tube being adapted telescopically to engage one end of a tubular standard or other tubular member, wherein said support bracket is in direct sliding engagement with said tube.
Claim 2
Dependent Claim
152 words
A base jack for the standards of a scaffold structure, which comprises a tube having a plurality of spaced transverse holes, a support bracket slidable lengthwise of said tube and having a transverse hole arranged to coincide with any one of said holes in said tube, said support bracket comprising a metal strip which is shaped to present a box-like projection, the free ends of said strip being of arcuate formation to closely fit around said tube and to be fixed to said tube, a locking pin provided to extend through said coincident holes in said bracket and said tube, and a base plate supporting a screw-threaded rod which is in threaded engagement with one end of said tube, the other end of said tube being adapted telescopically to engage one end of a tubular standard or other tubular member, wherein said support bracket is in direct sliding engagement with said tube.
Claim 3
Dependent Claim
41 words
A base jack as claimed in claim 1, in which said box-like projection of said support bracket is formed with transverse holes to receive a tommy bar to facilitate turning of said bracket with said tube relative to said screw-threaded rod.
Claim 4
Dependent Claim
34 words
A base jack as claimed in claim 2, in which the uppermost edge of said bracket has fixed thereto an annular plate which provides a bearing surface for the end of said tubular standard.
Claim 5
Dependent Claim
27 words
A base jack as claimed in claim 3, in which the end of the tube has fixed thereto an internally screw-threaded nut to receive said screw-threaded rod.
Claim 6
Dependent Claim
23 words
A base jack as claimed in claim 3, in which said end of said tube is internally screw-threaded to receive said screw-threaded rod.
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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |