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Publication numberUS3250344 A
Publication typeGrant
Publication dateMay 10, 1966
Filing dateOct 8, 1964
Priority dateOct 8, 1964
Publication numberUS 3250344 A, US 3250344A, US-A-3250344, US3250344 A, US3250344A
InventorsMario Romano
Original AssigneeMario Romano
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Stepladder-scaffold combination
US 3250344 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

May 10, 1966 M. ROMANO STEPLADDER-SCAFFOLD COMBINATION Filed 001;. 8, 1964 I N VEN TOR. MAR/0 ROMA/V0 BY W 4 TI'ORNE Y5.

United States Patent 9 3,258,344 STEPLADDER-SCAFFOLD COMBINATION Mario Romano, 16 Tower Court, Hempstead, N.Y. Filed Oct. 8, 1964, Ser. No. 403,447 6 Claims. (Cl. 182-27) This invention relates to stepladder-scaflold combinations. More particularly, it relates to an improved stepladderscatfold structure which is simple, durable, efficient and readily transportable.

The many known combined stepladder and scaffold arrangements which may function as a stepladder and which are expandable to a scaffold are all characterized by stepladder to scaffold expansion mechanisms which may comprise such devices such as complex pivotally constructed lazy tong levers, hingedly connected scaffold platform sections, and pivotable links which connect the scaffold platform to the stepladder components. Of necessity, these hinge, pivot and link constructions are complicated expensive, difficulty maintained and quite heavy for ready manual transportation from one location to another. Furthermore, because of such constructions, these arrangements, even when collapsed to a stepladder, cannot be compact and are disadvantageously space consuming.

Accordingly, it is an important object of this invention to provide an efficient stepladder-scaffold which is simple in construction and durable.

Another object of the invention is to provide a'stepladder-scaffold in accordance with the proceeding object which is collapsible to a compact stepladder structure and which is readily manually transportable from one location to another.

Generally speaking and in accordance with the invention, there is provided a combined stepladder-scaifold arrangement which includes a foldable .stepladder adapted to rest firmly on a flat surface when in an unfolded position, a first channel wider than the ladder and adapted to be disposed in a plane parallel to the aforesaid surface, the first channel comprising a platform section having one end supported by the top of one ladder and side walls extending downwardly from the platform portion, a portion of the top of the ladder being received in the first channel. There is further provided a second channel sufliciently narrower than the first channel to be nestably slidable thereinto, the second channel being adapted to be disposed substantially continuous with the first channel and having a platform section parallel to the flat surface and side walls extending downwardly therefrom, one end of the second channel being received in the other end of the first channel, and upright support means, the platform portions constituting the platform, the upright support means being carried by the channels to support the platform. Preferably, the upright means comprises a first support located at the junction of the first and second channels and a second sup-port located at the other end of the second channel. For the combination advantages of maximum platform length and optimum space saving when the stepladder-scafi'old is collapsed to a stepladder, the second platform portion slightly exceeds the first platform portion in length and the second support has a length slightly greater than that of the first, each support and each platform portion having a length substantially equal to the length of the ladder, approximately wardly perpendicularly ice equal to the height of the ladder. The second support preferably is hinged to the other end of the second channel to be able to be underfolded into the second channel and the second channel containing the second support is slidable into the first channel. The first support preferably is hinged to the outer surfaces of the side walls of the other end of the first channel to enable the first support to be folded to contain the first channel. The first channel is hinged at its one end to the top of the ladder whereby the combination of the first support engirdling the first channel which has received thereby the second channel containing the underfolded second support is enabled to be folded in abutting relationship with a side of the ladder.

Although such novel feature or features believed to be characteristic of the invention are pointed out in the claims, the invention and manner in which it may be carried out may be further understood by reference to the following description and the accompanying drawings.

In the drawings, FIG. 1 is a three dimensional view of a stepladder-scalfold arrangement constructed in accordance with the principles of the invention in its fully expanded position;

FIG. 2 is a three dimensional view showing the stepladder-scaffold arrangement of FIG. 1 in a partially expanded position;

FIG. 3 is a three dimensional view showing the stepladder-scaifold arrangement of FIG. 1 in its collapsed condition; and

FIG. 4 is a section taken along lines 44 of FIG. 2 looking in the direction of the arrows.

Referring now to the figures, the stepladder portion therein comprises the usual two slanted upright 11 and 12 which are foldable to an open and a closed position by hinged braces 13 and 14/ Portion 11 includes the usual vertically spaced steps 15 and portion 12 includes the spaced crossbars 16, the top of the ladder being designated by the numeral 17. To insure firm full surface contact of portion 11 with a flat surface when ladder 10 is in the unfolded position, rubber treaded safety shoes may be provided at the bottom ends of the side rails of portion 11.

A first channel 19 having a width greater than ladder 10 has one end 20 thereof resting on, and substantially parallel to the long dimension of a portion of top 17, channel 20 comprising a surface, i.e. platform portion 24 adapted to be disposed parallel to the flat surface upon which ladder 10 rests, and side walls 22 which extend perpendicularly downwardly from platform 24.

A second channel 26 comprises a platform portion 27- which also comprises sidewalls 28 which extend downfrom platform portion 27. Channel 26 is chosen to have a length slightly longer than that of channel 19, a Width less than that of channel 19, and sidewalls 28 are chosento be shorter than sidewalls 22 whereby channel 26 is slidable into channel 19 and its substantially full length is receivable therein. When the arrangement of the figures is in its fully expanded position, end portion of channel 26 is received in end portion 21 of channel 19.

A runged upright support 30 is hingedly connected to the outer surface of the ends 21' of sidewalls 22 and has a length such that it is disposed perpendicularly to the flat base and the platform portions and rests firmly on the flat base when the stepladder-scaffold arrangement is in the expanded position.

A support 32 having rungs 33 is hingedly connected to the inner surfaces of ends 28' of sidewalls 28. Upright support 32 is chosen to be slightly longer than support 30 and the bottom of its side rails so cut that when the combination stepladder-scaffold is in its expanded position, it rests firmly on the flat base and extends upwardly to platform 27 at an angle displaced from the perpendicular. With this arrangement, of course, greater stability is provided to the arrangement.

Preferably, channel 19 is chosen to have a length just slightly less than the length of portion 12 of ladder '10, upright 30 is optimally chosen to have a length about equal to that of channel 19, channel 26 is chosen to have a length slightly greater than channel 19 and support 32 is chosen to have a length substantially equal to that of channel 26, the greater length of channel 26 and support 32 enabling the oblique disposition of support 32.

To collapse the arrangement shown in FIG. 1 to the position of FIG. 3, support 32 is first folded under to be received flush in the space defined by the undersurface of platform 27 and the inner surface of sidewalls 28.

"Channel 26 containing upright 32is now slid into channel 19 as far as it can go. As shown in FIG. 2, because of its greater length than channel 19, a small portion 34 will protrude from the end of channel 19. Upright 30 is now pivoted outwardly a 270 angle to flushly receive channel 19 and theflush combination is pivoted vat end 20 to be in abutting relationship with portion 12 of ladder '10.

'From the foregoing, it is readily appreciated that with this invention there is provided a simple readily collapsible stepladder-scaffold combination which is readily manually transportable.

'The terms and expressions which are employed are used as terms of description. It is recognized, though,

that various modifications are possible within the scope of-the invention claimed.

Having thus described certain forms of the invention in some detail what is claimed is:

1 A combined stepladder-scaffold arrangement comprising a foldable stepladder adapted to 'rest firmly on a fiat surface when in an unfolded state, a first channel "Wider than said ladder and adapted to be disposed in a plane parallel to said surface, said first channel having a first platform portion substantially continuous with the top of said ladder andfirst side walls extending from said first platform portion and receiving a portion of said top therebetween, a second channel sufficiently narrower than said first channel to be nestably slidable into said first channel, said second channel being adapted to be disposed substantially parallel to said flat surface and .having a second platform portion and second side walls one end-of said second channel being normally received .in the end tportion of said first channel, said first and second platform portions constituting an extensible platform, and upright support means carried by said channels for supporting said extensible platform, said last named means comprising a first support located at the junction of the first and second channels, said first support pivotally attached to the outer surface of said first sidewalls substantially at saidjunction and a second support located at the other end of said second channel, said second supportpivotally attached to the inner surface of said second sidewalls substantially at said other end of said channel, said second platform portion slightly exceeding in length that of said first portion, said second support slightly exceeding in length that of said first support, each'of said platform portions and said uprights being substantially equal in length of said ladder.

2. A combined stepladder-scaffold arrangement comprising a foldable stepladder adapted to rest firmly on a fiat surface when in an unfolded state, a first channel wider than said ladder and adapted to be disposed in a plane parallel to said surface, said first channel having a first platform portion substantially continuous with the top of said ladder and first side walls extending from said first platform portion and receiving a portion of said top therebetween, a second channel sufficiently narrower than said first channel to be nestably slidable into said 'first channel, said second channel being adapted to be disposed substantially parallel to said fiat surface and having a second platform portion and second side walls, one end of said second channel being normally received in the end portion of said first channel, said first and second platform portions constituting an extensible platform, upright support means carried by said channels for supporting said extensible platform, said last named means comprising a first support located at the junction of the first and second channels and a second support located at the other end of said second channel, said first support adapted to be pivoted upward and about said first channel and said second support adapted to pivot upward and within said second channel when said arrangement is collapsed.

3. A combined stepladder-scafiold arrangement comprising a foldable stepladder adapted to rest firmly on a flat surface when in an unfolded state, a first channel wider than said ladder and adapted to be disposed in a plane parallel to said surface, said first channel having a first platform portion substantially continuous with the top of said ladder and first side walls extending from said first platform portion and receiving a portion of said top therebetween, a second channel sufliciently narrower than said first channel to be nestably slidable into said first channel, said second channel being adapted to be disposed substantially parallel to said fiat surface and having a second platform portion and second side walls, one end 'of said second channel being normally received in the end portion-of said first channel, saidlfirst and second platform portions constituting an extensible platform, upright support 'meanscarried by said channels for "supporting said extensible platform, said last named means comprising a first support located at the junction of the first and second channels and a second support located at the other end of said second channel, said first support adapted to be pivoted upward and about said first channel and said second support adapted to pivot upward and within said second channel when said arrangement is collapsed, each of said platform portions and said uprights being substantially equal in length to the length of the ladder.

nel, said second channel being adapted to be disposed substantially parallel to said flatsurface and having a second platform portion and second side walls, one .end

of said second channel being normally received in the end portion of said first channel, said first and second .platform portions constituting an extensible platform, upright support means carried by said channels for supporting said extensible platform, said last named meanscom- .prising .a first support located at the junction of the first and second. channels and a second support located at the other end of said second channel, said .first support adapted to be pivoted upward and about said first channel and said second support adapted to pivot upward and within said second channel when said arrangement is collapsed, said second platform portion slightly exceeding in length that of said first portion, said second support slightly exceeding in length that of said first support, each of said platform portions and said uprights being substan tially equal in length to the length of said ladder.

5. A combined stepladder-scaffold arrangement as defined in claim 4 in which said first support is pivotally attached to the outer surface of said first sidewalls substantially at said junction and said second support is pivotally attached to the inner surface of said second sidewalls substantially at said other end of said channel.

6. A combined stepladder-scafi'old arrangement as defined in claim 5 wherein said first support is disposed substantially vertically and said second support is disposed obliquely when said arrangement is in expanded positron.

References Cited by the Examiner UNITED STATES PATENTS m HARRISON R. MOSELEY, Primary Examiner.

REINALDO P. MACHADO, Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US575397 *Mar 16, 1896Jan 19, 1897 Foldable ladder
US1033389 *Nov 8, 1911Jul 23, 1912William C FritzScaffold.
US1474250 *Jul 17, 1922Nov 13, 1923Frank FolliardCombined stepladder and scaffold
US2394221 *Apr 13, 1945Feb 5, 1946Waltz Homer BPlatform scaffold
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3659673 *Dec 31, 1970May 2, 1972Enneking Harold JPortable referee stand
US4004652 *Apr 12, 1976Jan 25, 1977Laboy Alvarado SamuelPortable bridge structure
US4951781 *Dec 4, 1989Aug 28, 1990Bliss Jeffrey JScaffolding structure
US5862881 *Dec 2, 1996Jan 26, 1999Keith J. JeffriesFor ladders with rungs and side rails for workers to stand
US7210558 *May 4, 2005May 1, 2007Votaw Industries, Ltd.Scaffold having detachable ladder assembly
US8210312 *Jun 25, 2009Jul 3, 2012Tetreault Jr Adrien RMobile work platform
US20070068733 *Sep 23, 2005Mar 29, 2007Barry SchlechtScaffold structure
EP0745753A1 *May 29, 1996Dec 4, 1996John Michael SandhamStair-ladder platform
WO2006106494A1 *Apr 7, 2006Oct 12, 2006Declan GallagherCombined stepladder and platform
Classifications
U.S. Classification182/27, 182/152, 182/118, 182/223
International ClassificationE04G1/30, E06C1/00, E04G1/00, E06C1/39
Cooperative ClassificationE04G1/30, E06C1/39
European ClassificationE04G1/30, E06C1/39