US3446310A - Scaffoladder,decorator model - Google Patents

Description

y 27, 1969 c. L. ALFIE 3,446,310

SCAFFOLADDER, nsconnon MODEL Filed June 22, 1967 Cop/a0 Z. A/f/e INVENTOR.

United States Patent US. Cl. 182--156 1 Claim ABSTRACT OF THE DISCLOSURE A two section top ends hinged divergeable and compactly foldable scalfoladder device, comprising a moderately broad and wide work platform either end, near endmost rigidly mounted atop a pair of space apart parallel U channel support bars having rightangle appended sidefianges of a width pertinent to function as linkage brackets, wherewith by means of the outer members of said U channel linkage brackets said Work platform is pivotally secured atop a rear portion multirail load supporting framework; and a front ladder portion, comprising a plurality of lesser dimensions auxiliary work platforms which are either end side corners pivotally joined to appertain spaced apart parallel elongated side rails of a compactly foldable duo-rail endframe situated at said front ladder portion either side end, which side rail top ends are pivotally joined to appertain inner parallel members of a said rear portion work platform either end, near endmost affixed spaced apart parallel support bar linkage brackets.

Specifications of this invention This invention is a unique creation in ladder art related mechanics devices. The words ladder and stepladder have by customary usage become established as transitive verbs definitive of ladder devices of conventional design. Therefore, the words ladder and/or stepladder are inept when used with reference to my invention. The hereinafter following specification and detailed description of my present invention will demonstrate that the word scaffoladderi more distinguishably identify and delineate my present invention.

More specifically, my present invention as illustrated in the accompanied perspective drawings, is comprised of a pertinently broad and wide safety tread surfaced work platform either end, near endmost rigidly mounted atop of a pair of spaced apart parallel U channel load support bars having rightangle appended sidefianges of a width apropos to function as linkage brackets wherewith, by means of the outer members of said spaced apart parallel U channel support bars sideflange linkage brackets, said work platform is, in a manner characteristically typical of an elevated platform scaflold structure, pivotally secured atop a rear portion multirail load support framework, which framework is comprised of two upright duorail endframes one each of which is situated at said elevated work platform either end side, which endframes are composed of two elongated spaced apart parallel siderails, which siderails lower ends, are embedded between and pivotally joined to the sideflanges of a pertinent length U channel bar as endframe lower end horizontal crossbrace, as endframe side rails lower end parallel spacer bar and, in like manner, appertain said work platform load supporting duo-rail endframes side rails top ends are embedded between and pivotally joined to sidefiange linkage brackets of pertinent outer members of said Work platform either end, near endmost afiixed spaced apart parallel U channel load support bars, wherewithal constant longitudinal parallelism is maintained between siderails of said top platform either appendant load supporting and compactly foldable duo-rail endframes, which endframes are supported and maintained in constant upright parallelism between endframes by means of one or more bracer bars horizontally positioned such as to provide obstruction free use of a work plank between two scafioladders and thereat rigidly mounted across the two end-frames rear positioned siderails backside, Wherewithal to constitute a rear portion said top platform load supporting framework, and; a front scaffoladder portion, which is comprised of a plurality of support frame mounted auxiliary work platform-of lesser dimensions than said rear portion work platform-which are either end, corner ends pivotally secured to appertain spaced apart parallel load supporting side rails of a said auxiliary platforms either end side situated load supporting and compactly foldable duo-rail endframe. The front scatfoladder portion said auxiliary platforms either end adherent endframe load supporting siderails are of same design but slightly longer than the rear portion 'WOIk platform load supporting endframes siderails. The front scatfoladder portion endframes side rails upper and lower ends are in all respects and like manner as rear portion work platform supporting endframes siderails upper and lower ends pivotally secured to pertinent pertaining U channel bar linkage brackets, whereas the front portion endframes side rail top ends are embedded between and pivotally secured to the inner members of said rear portion top platform either end, near endmost aflixed space apart parallel U channel bars sideflange linkage brackets. As is normal in divaricate ladder devices, a two piece expansion limiting spreader bar is provided at either endside of my invention. Wherewithal when the invention is in upright use position all work platforms will synergetically adjust to base or floor level, all endframes lower ends joined horizontal crossbraces will function as unit footing pieces, the front scaffoladder portion auxiliary work platforms will function as ladder steps in ascending to and descending from the rear portion scaffold elevated work platform, and the forward extended spread limit controlled front portion will function as side rigger wherewithal to maintain the unit in steadfast upright standing position. When in folded condition as for convenient transportation or small space storage all work platforms will synergetically fold to a compact straightline collateral relationship with adherent foldable endframes side rails and the rear portion endframes siderails will synergistically adjust to a relevantly compact side-by-side collateral relationship with the front portion load supporting endframes side rails.

The primary object of this invention is to provide a sturdy constructed and compact foldable stairstep device as illustrated in the accompanied perspective drawings, embodying broad and wide work platforms for work standing comfort and safety pertaining to scalfoladders, as a popular demand scaffold-ladder utility adapt to construction in a variety of height and dimensions for use in home, office, business, and particularly as an interior decorators scatfoladder utility device.

Further objects of my invention, which is to be considered as exemplary of and not as to specifically limiting the present invention, are detailed in the simplified description which follow hereinafter, whereby said objects will 'be apparent to persons skilled in the art after careful study of said descriptions.

To the accomplishment of the above and related objects, my invention may be embodied in the form illustrated in the accompanying single sheet drawings, attention being called to the fact, however, that the drawings are illustrative only, and that change may be made in the specific construction illustrated and described, so long as the scope of appended claims is not violated.

In the drawings:

FIGURE 1 is a perspective view of my present invention in use conditions; and

FIGURE 2 is a perspective view of my invention in non-use folded condition.

FIGURE 1 illustrates my present invention as a divaricate two sectional device, comprising a rear portion characteristically typical of an elevated work platform scaffold section and, a multiplatform front ladder portion which in aerial perspective is pictorially typical of a multisection scaffolding. FIGURE 1 further illustrates that the rear section is comprised of a pertinently broad and wide work platform T either end, near endmost rigidly mounted atop a U channel bracer bar having right angle appended side flanges of a width apropos to function as linkage brackets by which means platform T is either end pivotally secured atop a compactly foldable duo-rail endframe F2 in a manner such that appertain F-2 endframes inherent side rails and 16 are top ends embedded between and pivotally joined to pertinent platform T affixed U channel bars 10 linkage brackets, and that side rails 15 and 16 lower end are embedded between and pivotally joined to the sideflanges of a U channel 12 of a length pertinent to function as parallel spacer bar 12 between side rails 15 and 16, as adherent F-2 endframes lower end crossbrace 12, and as unit footing piece. One or more crossbrace 18 is horizontally extended across rear portion endframes F-Z side rails 16 in position such as to provide obstruction free use of a work platform between two scaffoladders and thereat rigidly joined to the back side of side rails 16, whereby a constant longitudinal parallelism is maintained between rear portion endframes F2.

FIGURE 1 also illustrates that the front ladder portion is comprised of a plurality of auxiliary platforms M of lesser dimensions than platform T, which are either endside near end corners pivotally joined to appertain elongated spaced apart parallel side rails 13 and 14 of a platform M either end side positioned F-l endframe, and that the front ladder portion endframes F-1 inherent side rails 13 and 14 are top ends embedded between and pivotally joined to the sideflange linkage brackets of a top platform T affixed U channel bracer bar 11 rigidly mounted inward space apart parallel to platform T either end, near endmost afiixed U channel bracer bar 10. In like manner as rear portion endframes F2, the front ladder portion endframes F-l, side rails 13 and 14 lower ends are embedded between and pivotally joined t th s1deflanges of a U channel parallel spacer bar 12, as F-1 endframeslower end crossbrace 12 and, as unit footing P e. As is normal in drvaricate type ladder devices, a 3'2 151 lfp e gil ndlrmrtmg spreader bar 19 is provided 51 ereby when the mventron is in prlght use position the front ladder portion will function as s 1derrgger in steadfast upright support of the rea portion elevated work platform scaffold section.

. G E 2 illustratively demonstrates that when the invention rs in folded non-use position as for transporta- 9 or small Space Storage P atform T and platforms M W111 synergetrcally collocate to a rightline generally o pact collateral relationship with and/ or between adherent endframes F 1 and F-Z appertain side rails, and that the rear portron F2 endframes side rails 15 and 16 will syrlrlertgetrfallly ad ulsli to a generally compact side-by-side co a era re ations p with front ladder rt' frames 13 and 14 side rails. p0 Ion F 1 end It should be understood that the fi gures and the s ecrfic description thereof set forth in this application fire for the purpose of illustrating the present invention and are not to be construed as limiting the present invention to the precise and detailed specific structure shown in the figures specifically described hereinbefore. Rather, the real invention is intended to include substantially equivalent construction embodying the basic teachings and inventive concept of the present invention.

I claim as my invention, and desire to secure by Letters Patent:

1. A scaifoladder, comprising; a rear section characteristically typical of an elevated work platform scaffold section, which consists of a pertinently broad and Wide work platform having at either end, underneath near endmost, a rightangle appended, upright standing, compactly folda-ble, duo-rail load support endframe, which endframes each consist of two elongated spaced apart parallel load support rails, which support rails upper-ends and lower-ends are in a pertinent manner pivotally conjoined by a U channel type horizontal crossbrace, preferably of a length equivalent to use platform endwidth, and further, said support rails upper ends horizontal crossbraces are top side rigidly aflixed to said top platform either end, near endmost, whereby said support rails upper-ends horizontal crossbraces also function as said work platform ends support bars, which endframes are upright supported and parallelism between endframes maintained by means of one or more crossbraces horizontally extended across said endframes rearward situated support rails and thereat endwise rigidly aflixed to pertain said endframes support rails backsides; and a front ladder section which is comprised of; a plurality of pertinently broad and wide intermediate Work platforms, which platforms are, in a spaced apart parellel position, horizontally extended between end, either end near end corners, pivotally secured to appertain support rails of a compactly foldable duo-rail load support endframe situated at said intermediate platforms either endside, whereby said work platforms also function as ladder steps in ascending and descending said rear scaffold section elevated work platform, which front ladder section duo-rail load support endframes are of a likeness design and selfsame assembled construction as the hereinbefore described rear scaffold section elevated work platform load support endframes, whereas, the front ladder section load support endframes support rails upper-ends horizontal crossbraces are rigidly afiixed to said rear scalfold section elevated work platform inward space apart parallel of the said either end, near endmost aflixed said rear section load support endframes support rails upperends horizontal crossbraces and, ladder devices, a two piece spread limit control spreader bar, which spreader bars opposite ends are pivotally secured to the front ladder section and the rear scaffold section pertain rear support rails backside.

References Cited UNITED STATES PATENTS 739,085 9/1903 Kamerer l82159 2,230,015 1/1941 Rich 182161 FOREIGN PATENTS 17,703 1/ 1899 Switzerland. 123,682 3/ 1947 Australia.

REINALDO P. MACHADO, Primary Examiner.

U.S. Cl. X.R.

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