US3684058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scaffold
Assignee: Ultra Products Inc
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Filing: 1971-05-13
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Granted: 1972-08-15
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Expires: 1991-05-13
Abstract
Abstract This invention is directed to a scaffold which may be readily assembled and adjusted for use by a workman or workmen having to work at different heights. The scaffold has a scaffold frame of three legs at each end comprising a center leg, an outer leg and an inner leg. Readily removable diagonal braces extend between the outer end legs and the respective center end legs and horizontal structural members are welded at different heights to each outer leg and the adjacent center leg to provide a rigid structure and also a ladder for use by the workman in climbing onto the scaffold. The horizontal structural members support planking or the like for holding work material at different height levels. The inner end legs are secured to the center legs at the bottom portions thereof by a reinforcing member. In addition, telescoping frames are provided of somewhat V-shape consisting of a pair of braces welded to a tube at one end which telescopes over the inner legs and U-shaped brackets at the other end of the braces which embrace the respective center legs. The frames are secured to the inner legs and center leg at different heights and support planking to provide a walking platform to support a workman.
Inventors
- 👤 William M Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:58
CPC Classifications
E; E04; E04G; E04G1/00; E04G1/18; E04G1/20; E04G1/14; E04G5/00; E04G5/06; E04G5/061
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
199 words
A scaffold, comprising a scaffold frame having upright legs spaced from each other and consisting of an outer leg, a center leg and an inner leg, a second scaffold frame having corresponding three upright legs longitudinally spaced from the first-named three legs and correspondingly consisting of an outer leg, a center leg and an inner leg, a plurality of horizontal bars secured to each center leg and the adjoining outer leg with the bars disposed to receive planking to provide a material holding platform at various desired heights for receiviNg work materials, readily removable diagonal bracing members extending between the respective outer legs and between the respective center legs, bracing means secured to the center legs and adjoining inner legs adjacent the bottom portions of said legs, a telescoping frame extending between each center leg and the adjoining inner leg above the bracing means with the frames disposed to receive planking to provide a walking platform to support a workman thereon, and means to secure the frames at different heights to the respective center legs and inner legs independently of the locating of the height of the material holding platform to locate the workman at the working height desired.
Claim 2
Dependent Claim
199 words
A scaffold, comprising a scaffold frame having upright legs spaced from each other and consisting of an outer leg, a center leg and an inner leg, a second scaffold frame having corresponding three upright legs longitudinally spaced from the first-named three legs and correspondingly consisting of an outer leg, a center leg and an inner leg, a plurality of horizontal bars secured to each center leg and the adjoining outer leg with the bars disposed to receive planking to provide a material holding platform at various desired heights for receiviNg work materials, readily removable diagonal bracing members extending between the respective outer legs and between the respective center legs, bracing means secured to the center legs and adjoining inner legs adjacent the bottom portions of said legs, a telescoping frame extending between each center leg and the adjoining inner leg above the bracing means with the frames disposed to receive planking to provide a walking platform to support a workman thereon, and means to secure the frames at different heights to the respective center legs and inner legs independently of the locating of the height of the material holding platform to locate the workman at the working height desired.
Claim 3
Dependent Claim
123 words
The scaffold of claim 1, wherein each frame is constructed of a tube which telescopes over the inner leg and a pair of braces extending from the tube with one of the braces being below the other, a U-shaped bracket secured to the free end of each brace and semi-encircling a respective center leg to permit movement over said leg to various heights, and readily removable bolts extending through each tube and each outer leg and through at least one of the brackets and a respective center leg to secure the frames to the legs with holes being provided in the center legs and inner legs at predetermined heights to receive the bolts and effect the location of the frames at different heights.
Claim 4
Dependent Claim
82 words
The scaffold of claim 1, with each leg of the scaffold having a horizontally extending hole at the top and bottom, a coupling member disposed to be inserted within the top of each leg of one scaffold and within the bottom of the legs of a second scaffold stacked on top of the first-named scaffold, and holes in the coupling member registering with holes in the legs of the scaffolds, and bolts extending through the registered holes to secure the scaffolds together.
Claim 5
Dependent Claim
49 words
The scaffold of claim 1, wherein an extension platform is provided on the outer side of the scaffold comprising a telescoping frame member removably secured to each inner end leg to support planking to provide either a platform for supporting work materials or a walking platform for a workman.
Claim 6
Dependent Claim
49 words
The scaffold of claim 1, wherein an extension platform is provided on the inner side of the scaffold comprising a telescoping frame member removably secured to each inner end leg to support planking to provide either a platform for supporting work materials or a walking platform for a workman.
Claim 7
Dependent Claim
55 words
The scaffold of claim 1, wherein the bracing means secured adjacent the bottom portions of the inner legs and center legs is disposed to receive planking when the telescoping frame is not in place so that a workman can work at a low level and is not required to stand on uneven or muddy ground.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |