![]() ![]() In this manner, the upper horizontal trusses 19 may be vertically adjusted relative to the ladder frames 15 to increase or decrease the vertical dimension of the scaffold as depicted in broken lines in FIG. The extension bars 24 are apertured at plural points 25 along their lengths to receive locking pins 26 removably contained within pairs of apertures in the members 17, which apertures may register with selected pairs of the apertures 25. The extension bars 24 and the other components of the trusses 19 are of rectangular cross section, as illustrated. Each upper arm or truss 19 forms the suspension member for the adjacent vertical ladder frame 15 or 16 and further includes spaced vertical depending extension bars 24 which are received telescopically and adjustably within the tops of the tubular frame members 17. Associated with each ladder frame of the scaffold is a top suspension arm or truss 19 of very rigid construction in a vertical plane and including a horizontal bar 20 and overhead converging inclined truss bars 21 and 22 connected with the bar 20 by a vertical brace 23 at the apex of the truss. Referring to the drawings in detail wherein like numerals designate like parts, a portable knock-down scaffold of wide utility comprises end vertical ladder frames 15 and 16 each having a pair of spaced parallel vertical rectangular cross section tubular frame members 17 and connecting braces 18, as illustrated. E04G5/062- Consoles Brackets specially adapted for attachment to building walls.E04G5/041- Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffolds on roof frameworks or on roofs.adjustable in height supported by roofs or ceilings E04G3/22- Scaffolds essentially supported by building constructions, e.g.E04G3/00- Scaffolds essentially supported by building constructions, e.g.E04G5/04- Means for fastening, supporting, or bracing scaffolds on or against building constructions.E04G5/00- Component parts or accessories for scaffolds.E04G- SCAFFOLDING FORMS SHUTTERING BUILDING IMPLEMENTS OR AIDS, OR THEIR USE HANDLING BUILDING MATERIALS ON THE SITE REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Individual filed Critical Individual Priority to US05/795,938 priority Critical patent/US4074792A/en Application granted granted Critical Publication of US4074792A publication Critical patent/US4074792A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Individual Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Ellis Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US05/795,938 Inventor Alonzo N. Google Patents Portable hanging scaffoldÄownload PDF Info Publication number US4074792A US4074792A US05/795,938 US79593877A US4074792A US 4074792 A US4074792 A US 4074792A US 79593877 A US79593877 A US 79593877A US 4074792 A US4074792 A US 4074792A Authority US United States Prior art keywords support arms bars hanging scaffold pair scaffold Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4074792A - Portable hanging scaffold ![]()
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