Патент USA US2409267код для вставки
M 15, 1946; i v. M. FowLER LADDER Filed Jan. 9, 1945 2, 9,266 Patented Oct. 15, 1946 2,409,266 UNITED STATES PATENT OFFICE `2,409,266 ’ ~ ï LADDER Victor M. Fowler, Spokane, Wash. Application January 9, 1945, Serial No. 572,039 ` 1 claimf (c1. zas-_33) 1 . 2 This invention relates to ladders and more par ticularly to a ladder of the step-ladder type, it being one object of the invention to provide a ladder with supporting legs at its rear which are mounted for swinging movement toward and away from the ladder into and out of folded po sition or into extended position for propping the ladder in upright position for use, the props or formed from strips of sheet metal folded as the ladder with rearwardly extending brackets in Fig. 4, it will be understood that they may be 9 to pivotally mount the yoke and this rod passes through the arms I2 of brackets I3 carried by the side rails 2 of the ladder. The brackets are shown in Fig. 4„and, referring to this ñgure, it will be seen that each bracket is of tubular for mation so that it ñts 4snugly about the rail to which it is applied and end portions of the'strip supporting legs being also mounted for swinging are'disposed in ñat face to face contacting en movement transversely of the ladder to folded 10 gagement with each other so that the arms I2 position or extended position. will be of double thickness. While the brackets Another object of the invention is to provide have been shown as rectangular in cross section between which is pivotally mounted a depending of appropriate cross sectional shape to iìt the side yoke having the supporting legs or props pivoted 15 rails. Headed fasteners I4 secure the brackets thereto so that the props may be swung trans to the side rails of the ladder and the end por versely of the ladder and also swung with the tions of the strips forming the arms I2 are se yoke toward and away from the ladder. cured to each other by rivets I5. The upper ends Another object is to provide improved braces of the legs or props 5 are pivotally mounted be for releasably holding the props extended when 20 tween the leaves of the yoke by pins I 6 and addi swung rearwardly from the ladder to extended tional pins I'I are passed through the leaves near position, there being also provided improved braces for holding the props extended when swung transversely of the ladder to extended position. Another object of the invention is to provide a step-ladder of the improved construction which is simple in construction and very strong. their ends. - All of the pins carry sleeves I8 serv » ing as spacers to hold the sleeves in predeter mined spaced relation to each other so that the legs 5 may swing freely about the pins I6 to folded or extended positions. The pins I'I limit move ment of the legs in the direction of the extended The invention is illustrated in the accompany position. Portions of the leaves between the legs ing drawing, in which: are reinforced by a block I9 secured by rivets 2U Fig. 1 is a side elevation of the upper portion 30 and this block will serve as means for limiting of a ladder having the improved construction. movement of the legs toward each other when Fig. 2 is a rear view of the improved ladder. swung to retracted position. Fig. 3 is a transverse sectional view on the line When the ladder is in use, the legs 5 are swung 3-3 of Fig. 1. _ with the yoke rearwardly from the ladder to the Fig. 4 is a sectional view on the line 4_4 of extended position shown in Fig. 1, and then Fig. 1. ‘ swung transversely of the ladder away from each Fig. 5 is a fragmentary sectional view on the other to the extended position shown in Fig. 2. line 5-5 of Fig. 2. If the ladder is to be used in a corner or other Fig. 6 is a fragmentary view on the line 6--6 close quarters which would make it inconvenient of Fig. 3. 40 to have the legs extended as shown in Fig. 2, The ladder, indicated in general by the numeral they may be swung rearwardly to extended posi tion and left close to each other instead of being extended transversely of the ladder. of the side rails and projecting rearwardly there In order to brace the legs when swung rear from as shown in Fig. 1. This ladder may be of 45 wardly to extended position, there has been pro any height desired. vided a bracing structure or stretcher consisting The props or legs 5 are of appropriate length of front bars 2| and rear rods 22 and a bridging and preferably taper toward their lower ends, as plate or strip 23. The bars 2l have their front shown in Fig. 2. 'I‘hese legs are formed of wood ends pivoted to the side rails 2 of the ladder by or other suitable material and, at their upper 50 fastener pins 24 and, upon referring to Fig. 3, it ends, fit between the leaves 6 and 'I of a yoke will be seen that the bars converge rearwardly. 8 which is formed of metal and has its leaves con and have their rear ends bent to «form diverging nected at their upper edges with a sleeve 9 merg portions 25 secured fiat against inner faces of the ing into the leaf 'I and connected with leaf 6 depending end ñanges 26 of the bridge 23 by riv by a bridge I 0. A rod I I passes through the sleeve 55 ets 27. Eyes 28 are carried by the bridge in de I, has the usual side rails 2 and steps 3, a head board or platform 4 being mounted at upper ends _ 2,409,266 4 pending relation thereto and through these eyes held horizontally in alinement with each other are loosely engaged eyes at front ends of the rods 22. Rear ends of the rods 22 are formed with eyes 30 which are loosely engaged through the eyes 3| of bolts 32 mounted through the legs 5. legs will be prevented from shifting inwardly to Ward retracted position. By shifting the bars 33 and 34 upwardly the legs may be fully retracted- When the legs are swung towards the ladder to the retracted position, the bars 2| and rods 22 place. are swung upwardly to folded position and, when after the manner of a break-joint brace and the or only partially retracted for use in a restricted What is claimed is: A spreader for a step -ladder equipped with legs the legs are extended rearwardly, the bars and rods are moved downwardly and pressure then 10 mounted for swinging movement to retracted applied to the bridge 23 to force the bars and rods to fully depressed position, in which position they will very effectively hold the legs extended. Transverse movement of the legs to extended position is controlled by a stretcher structure shown in Figs. 2 and 3. This brace or stretcher consists of strips o1- bars 33 and 34 pivoted to front and rear faces of the legs by pins >35. The inner ends of the bars are overlapped and piv otally connected by a pin 36 carrying a spacer sleeve 31 and one of the bars 34 is provided at its inner end with a tongue 31 extending longitudi nally therefrom and carrying a forwardly pro jecting side ear 38 which overlaps the other bar 34 and limits downward movement of the bars. When the legs are swung transversely of the lad der to extended position and downward pressure is applied to the bars 33 and 34, the bars will be and extended positions, said spreader comprising front and rear bars and a transverse bridge, said *I lbridge having depending flanges at its opposite ends diverging rearwardly, said front bars con verging rearwardly and having rear end portions bent to provide rearwardly diverging portions se cured flat against inner side faces of said ñanges, forward end portions of said front arms being bent to extend parallel to each other and adapted to be pivoted to a ladder, eye `bolts depending from said bridge, said rear bars having eyes at their front ends loosely engaged through eyes of the eye bolts, rear ends of said rear bars being also formed with eyes and eye bolts loosely engaged through the eyes at rear ends of the rear bars for loosely _connecting the rear bars with legs of the ladder. VICTOR M. FOWLER.