US3817641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Builders scaffolding
Assignee: RMD Kwikform Ltd
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Filing: 1972-05-25
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Granted: 1974-06-18
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Expires: 1992-05-25
Abstract
Abstract For builders'' scaffolding, a transom element having at one or both ends a dependent spigot, secured within a socket on an upright scaffold member by a wedge, working within slots formed in upper and lower wall portions at the end of the transom element.
Inventors
- 👤 R Steele
- 👤 A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:39
CPC Classifications
E; E04; E04G; E04G7/00; E04G7/30; E04G7/302; E04G7/306; E04G7/307; F; F16; F16B; F16B2200/00; F16B2200/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
278 words
In a tranSom element for connecting upright scaffolding members of builders scaffolding, the improvement comprising: a wedge member; a transom member, the end of said transom member being formed as vertically spaced apart, substantially horizontally extending, wall-like portions, each said portion formed with a slot extending away from the associated upright scaffold member, with the end of each slot further from the scaffold member being closed and the edges of the two slots forming guide means for the wedge member; a spigot member extending within the two slots and substantially perpendicular to the length of the two slots, and being secured to said slotted portions, the spigot member being formed as a metal pressing of substantially channel-form in cross section as viewed in plan with the open mouth of the channel directed away from the closed end of each of the two slots, the free edges of the sides of which channel are adapted for clamping engagement with the adjacent side of the upright scaffold member, and the outer face of the web portion of the channel affording a wedge member engaging face with the wedge member being received within the two slots at a position between the wedge member engaging face of the spigot member and the closed end of the two slots, the channel-like metal pressing being of progressively decreasing depth in a direction upwardly of the spigot member to provide an inclination of its wedge member engaging face to the vertical while maintaining, in a direction along the length of the spigot member, direct clamping engagement between the edges of the channel sides and the upright scaffold member when the wedge member is fully driven.
Claim 2
Dependent Claim
278 words
In a tranSom element for connecting upright scaffolding members of builders scaffolding, the improvement comprising: a wedge member; a transom member, the end of said transom member being formed as vertically spaced apart, substantially horizontally extending, wall-like portions, each said portion formed with a slot extending away from the associated upright scaffold member, with the end of each slot further from the scaffold member being closed and the edges of the two slots forming guide means for the wedge member; a spigot member extending within the two slots and substantially perpendicular to the length of the two slots, and being secured to said slotted portions, the spigot member being formed as a metal pressing of substantially channel-form in cross section as viewed in plan with the open mouth of the channel directed away from the closed end of each of the two slots, the free edges of the sides of which channel are adapted for clamping engagement with the adjacent side of the upright scaffold member, and the outer face of the web portion of the channel affording a wedge member engaging face with the wedge member being received within the two slots at a position between the wedge member engaging face of the spigot member and the closed end of the two slots, the channel-like metal pressing being of progressively decreasing depth in a direction upwardly of the spigot member to provide an inclination of its wedge member engaging face to the vertical while maintaining, in a direction along the length of the spigot member, direct clamping engagement between the edges of the channel sides and the upright scaffold member when the wedge member is fully driven.
Claim 3
Dependent Claim
32 words
A transom element according to claim 1 in combination with a. a plurality of upright scaffold members having peripheral sockets; and b. a plurality of said transom elements connecting said scaffold members.
Claim 4
Dependent Claim
231 words
In a transom element for connecting upright scaffolding members of builders scaffolding, the improvement comprising: a wedge member; a transom member, the end of said transom member being formed as vertically spaced apart, substantially horizontally extending, upper and lower wall-like portions, each said portion formed with a slot extending away from the associated upright scaffold member, with the end of each slot further from the scaffold member being closed, and the edges of the two slots forming guide means for the wedge member; a spigot member extending within the two slots and substantially perpendicular to the length of the two slots, and being secured to said slotted portions by welding along the length of each of the two edges of each slot, the spigot member where it is within at least the upper of the two slots at the side thereof nearest to the closed end of the slots being of channel configuration with the mouth of the channel directed towards the closed end of the upper slot, and with base of the channel affording an inclined wedge member engaging face, with the wedge member being received within the two slots at a position between the wedge member engaging face of the spigot member and the closed end of the two slots, the opposed inner faces of the sides of the channel receiving therebetween the adjacent part of the wedge member.
Claim 5
Dependent Claim
231 words
In a transom element for connecting upright scaffolding members of builders scaffolding, the improvement comprising: a wedge member; a transom member, the end of said transom member being formed as vertically spaced apart, substantially horizontally extending, upper and lower wall-like portions, each said portion formed with a slot extending away from the associated upright scaffold member, with the end of each slot further from the scaffold member being closed, and the edges of the two slots forming guide means for the wedge member; a spigot member extending within the two slots and substantially perpendicular to the length of the two slots, and being secured to said slotted portions by welding along the length of each of the two edges of each slot, the spigot member where it is within at least the upper of the two slots at the side thereof nearest to the closed end of the slots being of channel configuration with the mouth of the channel directed towards the closed end of the upper slot, and with base of the channel affording an inclined wedge member engaging face, with the wedge member being received within the two slots at a position between the wedge member engaging face of the spigot member and the closed end of the two slots, the opposed inner faces of the sides of the channel receiving therebetween the adjacent part of the wedge member.
Claim 6
Dependent Claim
24 words
A transom element according to claim 3 wherein each spigot member is formed as a forging or a casting as opposed to a pressing.
Claim 7
Dependent Claim
72 words
A transom element according to claim 3 wherein the opposed inner faces of the two sides of the channel-like part of the spigot member are spaced from one another by a distance corresponding to the thickness in such direction of the part of the wedge member therebetween so as well as the adjacent wall slot to provide means for guiding the wedge member against undesired lateral movement relative to the transom member.
Claim 8
Dependent Claim
51 words
A transom element according to claim 3, wherein each spigot member is formed at least partly to square or rectangular form as viewed in plan with the square or rectangular form as viewed in plan with the square or rectangular portion accommodated in a correspondingly shaped notch-like portion of each slot.
Claim 9
Dependent Claim
32 words
A transom element according to claim 3 in combination with a. a plurality of upright scaffold members having peripheral sockets; and b. a plurality of said transom elements connecting said scaffold members.
Claim 10
Dependent Claim
151 words
In a transom element for connecting upright scaffold members of builders scaffolding, the improvement comprising: a wedge member; a spigot member having a slot forming a wedge member engaging face; and a transom member, the end of said transom member being formed as vertically spaced apart, substantially horizontally extending, wall-like portions, each said portion formed with a slot extending substantially perpendicular to the length of the spigot member, and away from the associated upright scaffold member, with the end of each slot further from the scaffold member being closed, the spigot member extending in a recess within the two slots and being secured to said slotted portions, the edges of the two slots forming guide means for the wedge member, with the wedge member being received within the two slots at a position between the wedge member engaging face of the spigot member and the closed end of the two slots.
Claim 11
Dependent Claim
151 words
In a transom element for connecting upright scaffold members of builders scaffolding, the improvement comprising: a wedge member; a spigot member having a slot forming a wedge member engaging face; and a transom member, the end of said transom member being formed as vertically spaced apart, substantially horizontally extending, wall-like portions, each said portion formed with a slot extending substantially perpendicular to the length of the spigot member, and away from the associated upright scaffold member, with the end of each slot further from the scaffold member being closed, the spigot member extending in a recess within the two slots and being secured to said slotted portions, the edges of the two slots forming guide means for the wedge member, with the wedge member being received within the two slots at a position between the wedge member engaging face of the spigot member and the closed end of the two slots.
Claim 12
Dependent Claim
32 words
A transom element according to claim 8 in combination with a. a plurality of upright scaffold members having peripheral sockets; and b. a plurality of said transom elements connecting said scaffold members.
References Cited (Backward Citations)
US3420557A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |