US2633376A - Joint for a spreader for an extension stepladder - Google Patents

Joint for a spreader for an extension stepladder Download PDF

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Publication number
US2633376A
US2633376A US203895A US20389551A US2633376A US 2633376 A US2633376 A US 2633376A US 203895 A US203895 A US 203895A US 20389551 A US20389551 A US 20389551A US 2633376 A US2633376 A US 2633376A
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Prior art keywords
members
leg
channel
stepladder
secured
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Expired - Lifetime
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US203895A
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Durwood O Foshee
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
    • E06C1/22—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles with extensible, e.g. telescopic, ladder parts or struts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32549—Articulated members including limit means
    • Y10T403/32557—Articulated members including limit means for pivotal motion

Definitions

  • An object of this invention is to provider a stepladder construction having extensible legs with the ⁇ base legs formed ofextruded channels.
  • Another object of this invention is to provide an extensible stepladder which. will stand rm in extended position.
  • a further object' off thisv invention is to provide an improved collapsible bracing. means between the front and rear legs.V
  • FIG. 1 is a detailed side elevation of an extension stepladder partly broken away and in section embodyingV this invention'.
  • Figure 2 is a detailed front elevation of the stepladder.
  • Figure 3 is a fragmentary sectional View taken on the line 3 3 of Figure 1.
  • Figure 4 is a fragmentary sectional view taken on the line 5 6 of Figure 1.
  • Figure 5 is a fragmentary sectional view taken on the line 5 5 of Figure 1.
  • Figure 6 is a fragmentary sectional view taken on the line 5 6 of Figure 1.
  • Figure '7 is a sectional view taken on the line 1 1 of Figure l.
  • Figure s is a fragmentary sectional view taken on the line 8 8 of Figure l.
  • Figure 9 is a fragmentary side elevation of one oi the bracing members.
  • each front leg member IU is formed of an inner hat wall i4 having substantially right angular outwardly extending anges I5 integral therewith.
  • Each ange I5 has formed integral therewith a transversely arcuate guide member IS, the concave inner sides of the guide member I6 being disposed in confronting relation.
  • the outer edges of the arcuate guide members I6 are formed with outwardly projecting flanges I1.
  • An extensible leg member generally designated as I8 is slidable within each channell member I9 and is formed with an elongated wooden strip which is provided' on the inner side thereof with a longitudinally extending channel I9 confronting the inner wall Ist.Y
  • the opposite longitudinal edges of the strip or extensiblev leg member concave sides ofthe guide member I9 and' is'also formed'with arabbet 2l withinwhich the flange i'isadapt'ed to engage.
  • the leg member I8 ⁇ is also formed with a rabbet 22 adjacent the outer" edge thereof' with 'which the flange il is' adapted toengage.
  • i8 is formed with av plurality of vertically spaced apart sockets or keepers 'which communicate-l with the channel'ori cutout I9.
  • the leg members i3 are adapted to be adjustedr lengthwise ci the channel members I9 by means of' a pair of' spring pressed leg locking boltsA 24vwhich are slidably disposed in a horizontallyy disposed housing ⁇ 25 ofY tubularA configuration which is provided at eachend thereof with ⁇ a anged-tting Iii-secured by'fastenngv means 211V to the' inner' sides ofl the channel members' IU.
  • the tubular member 25 is positioned" adjacentA the lower ends of the legs or channel members i0, and the bolts 24 are spring pressed outwardly to locking position by means of spring 28 which engages between forwardly projecting pins or operators 39 which are slidable through longitudinal slots 3i formed in the guide tube 25.
  • a plurality of vertically spaced apart steps 32 are secured between the leg members i9, and the latter as shown in Figure 2 are disposed in upwardly convergent relation.
  • the steps 32 engage inwardly projecting lugs or brackets 33 which are struck from the inner wall I4 and the steps 32 are secured to the lugs 33 by fastening means 34.
  • Each extensible leg member I9 has secured to the lower end thereof a rubber shoe or anti-friction member 35 so that the extensible legs I8 will not slip on a smooth surface.
  • the stepladder also includes a pair of rear collapsible leg members generally designated as 38 which are formed of channel shaped leg members 37 pivoted as at 38 to the angle members I I.
  • the channel members 3i are of substantially the same configuration as the channel members I0, being of substantially C-shape, and the channel members 31 are braced in upwardly convergent relation by means of a pair of crossed bracing members 39 and lll).
  • the bracing members 39 and 40 are secured together by a central securing member 4I and are secured at their upper ends to the inner sides of the channel members 31 by fasten- IS is formed with' rounded ⁇ bead shaped edges 29' engaging inl the,
  • each leg member ing devices 42 The inner side of each leg member ing devices 42.
  • the leg members 36 also include extensible legs 43 which are slidable in the channel members 31 and have the same configuration in cross section as the leg members I8.
  • the extensible leg members 43 are formed with sockets or keepers 44 communicating with a longitudinal channel 45 formed on the inner side of each leg member 43, and spring pressed locking bolts 46 are engageable in selected sockets 44.
  • the spring pressed bolts 46 are constantly urged outwardly to locking position by a spring 41 which engages between operators 52 carried by the bolts 46.
  • the bolts 4S are slidable in a tubular housing or guide 49 which is formed at the opposite ends thereof with a flanged fitting 50 secured by fastening means I to the inner sides of the channel members 31.
  • each pin or operator 52 which is secured to the inner end of a bolt 45 slidably engages through an elongated slot 53 formed in the guide tube 49.
  • the lower end of each extensible leg 43 has secured thereto a shoe 54 which is preferably formed of rubber or the like so as to prevent slipping of the leg members 43 on a smooth surface.
  • the rear leg members 35 are adapted to be held in extended operative position by means of a pair of connected together links 55 and 56.
  • link 55 is pivotally secured as at 51 to the inner side of a leg member I0, and the rear end of link 56 is pivotally secured as at 58 to the inner side of a rear leg member or channel 31.
  • the inner end of link or bracing member 56 is provided with a reverted and obliquely bent extension 59 which is pivoted by means of a, pivot 60 to the inner end of link 55.
  • the obliquely exposed extension 59 forms a stop member 6
  • the stepladder hereinbefore described is so constructed that the upper or stationary leg members which are channel shaped in transverse section may be formed by the extrusion process.
  • the channel shaped leg members, both stationary and pivoted are adapted to be formed out of relatively light weight metal such as aluminum or the like so that the stepladder will be of relatively iight Weight.
  • a joint for a collapsible bracing means formed of a pair of flat elongated straight links, one end of one of said links being reversely folded upon itself at an acute angle to the remainder of said one link and spaced therefrom a distance substantially equal to the thickness of said link, the folded portion having an aperture therein, one end of the other link engaging between said one end and the reversely folded portion thereof, said one end of said other link having an aperture therein, and a pivot pin extending through said apertures securing said other link to said reversely folded portion, an edge of said reversely folded portion engaging the adjacent edge of said other link to thereby form a stop and hold said links in substantially parallel extended position.

Description

March-31, 1953 D. o. FosHEE 2,533,376
JOINT FOR A SPREADER FOR AN EXTENSION STEPLADDER Filed Jan. 2, 1951 2 SHEETS-SHEET l BY Q e ATTORNEYS March 31, 1953 D, o, FosH-EE 2,633,376
JOINT FOR A SPREADER FOR AN EXTENSIO STEPBADDBR Filed Jan. 2, 1951 2 SHEETS-SHEET 2 32 E45* BY M 34 5 5 ATTORNEYS Patented Mar. 31, 1953 UNITED STATES -frENT OFFICE JOINT FOR A SPREADER FORAN EXTENSION STEEIJADIISERv Dum/ccd0. Foshee, J a'cksonville, Fla.
ApplicationJanuary 2, 1951, Serial No. 203,895
An object of this invention is to provider a stepladder construction having extensible legs with the `base legs formed ofextruded channels.
Another object of this invention is to provide an extensible stepladder which. will stand rm in extended position.
A further object' off thisv invention is to provide an improved collapsible bracing. means between the front and rear legs.V
With the above and otherk objects in viewmy invention consists in the arrangement, combinationand details of construction disclosed inthe drawings and'specication, and then more particularly pointed'out'in the' appended claim.
In the drawings:
Figure 1 is a detailed side elevation of an extension stepladder partly broken away and in section embodyingV this invention'.
Figure 2 is a detailed front elevation of the stepladder.
Figure 3 is a fragmentary sectional View taken on the line 3 3 of Figure 1.
Figure 4 is a fragmentary sectional view taken on the line 5 6 of Figure 1.
Figure 5 is a fragmentary sectional view taken on the line 5 5 of Figure 1.
Figure 6 is a fragmentary sectional view taken on the line 5 6 of Figure 1.
Figure '7 is a sectional view taken on the line 1 1 of Figure l.
Figure s is a fragmentary sectional view taken on the line 8 8 of Figure l.
Figure 9 is a fragmentary side elevation of one oi the bracing members.
Referring to the drawings the numeral I9 designates generally a pair of front channel-shaped leg members which are secured at their upper ends by means of angle members I I and fastening devices I2 to a top step I3. The channel members I9 are generally of substantially C- shape and as shown in Figure 3 each front leg member IU is formed of an inner hat wall i4 having substantially right angular outwardly extending anges I5 integral therewith. Each ange I5 has formed integral therewith a transversely arcuate guide member IS, the concave inner sides of the guide member I6 being disposed in confronting relation. The outer edges of the arcuate guide members I6 are formed with outwardly projecting flanges I1. An extensible leg member generally designated as I8 is slidable within each channell member I9 and is formed with an elongated wooden strip which is provided' on the inner side thereof with a longitudinally extending channel I9 confronting the inner wall Ist.Y The opposite longitudinal edges of the strip or extensiblev leg member concave sides ofthe guide member I9 and' is'also formed'with arabbet 2l withinwhich the flange i'isadapt'ed to engage. The leg member I8`is also formed with a rabbet 22 adjacent the outer" edge thereof' with 'which the flange il is' adapted toengage. i8 is formed with av plurality of vertically spaced apart sockets or keepers 'which communicate-l with the channel'ori cutout I9.
The leg members i3 are adapted to be adjustedr lengthwise ci the channel members I9 by means of' a pair of' spring pressed leg locking boltsA 24vwhich are slidably disposed in a horizontallyy disposed housing` 25 ofY tubularA configuration which is provided at eachend thereof with` a anged-tting Iii-secured by'fastenngv means 211V to the' inner' sides ofl the channel members' IU. The tubular member 25 is positioned" adjacentA the lower ends of the legs or channel members i0, and the bolts 24 are spring pressed outwardly to locking position by means of spring 28 which engages between forwardly projecting pins or operators 39 which are slidable through longitudinal slots 3i formed in the guide tube 25. A plurality of vertically spaced apart steps 32 are secured between the leg members i9, and the latter as shown in Figure 2 are disposed in upwardly convergent relation. The steps 32 engage inwardly projecting lugs or brackets 33 which are struck from the inner wall I4 and the steps 32 are secured to the lugs 33 by fastening means 34. Each extensible leg member I9 has secured to the lower end thereof a rubber shoe or anti-friction member 35 so that the extensible legs I8 will not slip on a smooth surface.
The stepladder also includes a pair of rear collapsible leg members generally designated as 38 which are formed of channel shaped leg members 37 pivoted as at 38 to the angle members I I. The channel members 3i are of substantially the same configuration as the channel members I0, being of substantially C-shape, and the channel members 31 are braced in upwardly convergent relation by means of a pair of crossed bracing members 39 and lll). The bracing members 39 and 40 are secured together by a central securing member 4I and are secured at their upper ends to the inner sides of the channel members 31 by fasten- IS is formed with' rounded` bead shaped edges 29' engaging inl the,
The inner side of each leg member ing devices 42. The leg members 36 also include extensible legs 43 which are slidable in the channel members 31 and have the same configuration in cross section as the leg members I8. The extensible leg members 43 are formed with sockets or keepers 44 communicating with a longitudinal channel 45 formed on the inner side of each leg member 43, and spring pressed locking bolts 46 are engageable in selected sockets 44. The spring pressed bolts 46 are constantly urged outwardly to locking position by a spring 41 which engages between operators 52 carried by the bolts 46. The bolts 4S are slidable in a tubular housing or guide 49 which is formed at the opposite ends thereof with a flanged fitting 50 secured by fastening means I to the inner sides of the channel members 31.
The lower ends of the bracing members 39 and 40 are secured to the upper one of the fastening members 5l which secure the fittings 50 to the channel members 31. Each pin or operator 52 which is secured to the inner end of a bolt 45 slidably engages through an elongated slot 53 formed in the guide tube 49. The lower end of each extensible leg 43 has secured thereto a shoe 54 which is preferably formed of rubber or the like so as to prevent slipping of the leg members 43 on a smooth surface. The rear leg members 35 are adapted to be held in extended operative position by means of a pair of connected together links 55 and 56. The forward end of link 55 is pivotally secured as at 51 to the inner side of a leg member I0, and the rear end of link 56 is pivotally secured as at 58 to the inner side of a rear leg member or channel 31. The inner end of link or bracing member 56 is provided with a reverted and obliquely bent extension 59 which is pivoted by means of a, pivot 60 to the inner end of link 55. The obliquely exposed extension 59 forms a stop member 6| which is engageable with the upper edge of the link 55 so that the two links 55 and 56 will be disposed in substantially parallel relation when these links are in extended operative position.
The stepladder hereinbefore described is so constructed that the upper or stationary leg members which are channel shaped in transverse section may be formed by the extrusion process. The channel shaped leg members, both stationary and pivoted are adapted to be formed out of relatively light weight metal such as aluminum or the like so that the stepladder will be of relatively iight Weight.
What is claimed is:
A joint for a collapsible bracing means formed of a pair of flat elongated straight links, one end of one of said links being reversely folded upon itself at an acute angle to the remainder of said one link and spaced therefrom a distance substantially equal to the thickness of said link, the folded portion having an aperture therein, one end of the other link engaging between said one end and the reversely folded portion thereof, said one end of said other link having an aperture therein, and a pivot pin extending through said apertures securing said other link to said reversely folded portion, an edge of said reversely folded portion engaging the adjacent edge of said other link to thereby form a stop and hold said links in substantially parallel extended position.
DURWOOD O. FOSHEE.
REFERENCES CITED The following references are of record in the le of this patent:
UNITED STATES PATENTS Number Name Date 806,501 Rouse Dec. 5, 1905 861,583 Foster July 30, 1907 943,655 Coss Dec. 21, 1909 1,419,765 Schilling June 13, 1922 1,419,791 Wehrman June 13, 1922 1,942,849 Thrasher Jan. 9, 1934 2,0075 13 Gaiers July 9, 1935
US203895A 1951-01-02 1951-01-02 Joint for a spreader for an extension stepladder Expired - Lifetime US2633376A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0135666A2 (en) * 1983-09-29 1985-04-03 Andral Corporation Convertible fold-up ladder
US20040231920A1 (en) * 2003-05-22 2004-11-25 Meeker Paul K. Rigidified step ladder
US9765570B2 (en) 2014-07-14 2017-09-19 Otten & Otten Construction Limited Brace for step ladder

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US806501A (en) * 1905-04-27 1905-12-05 Manning M Rouse Propped ladder.
US861583A (en) * 1906-04-18 1907-07-30 George E Foster Step-ladder.
US943655A (en) * 1908-08-28 1909-12-21 James C Coss Vehicle-top-joint brace.
US1419765A (en) * 1918-04-19 1922-06-13 Louis F Schilling Collapsible bed
US1419791A (en) * 1919-06-16 1922-06-13 Christian Keck Hinge joint
US1942849A (en) * 1933-08-29 1934-01-09 Ned L Thrasher Stepladder brace
US2007713A (en) * 1933-09-09 1935-07-09 Herman B Gaffers Brace for ladders

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US806501A (en) * 1905-04-27 1905-12-05 Manning M Rouse Propped ladder.
US861583A (en) * 1906-04-18 1907-07-30 George E Foster Step-ladder.
US943655A (en) * 1908-08-28 1909-12-21 James C Coss Vehicle-top-joint brace.
US1419765A (en) * 1918-04-19 1922-06-13 Louis F Schilling Collapsible bed
US1419791A (en) * 1919-06-16 1922-06-13 Christian Keck Hinge joint
US1942849A (en) * 1933-08-29 1934-01-09 Ned L Thrasher Stepladder brace
US2007713A (en) * 1933-09-09 1935-07-09 Herman B Gaffers Brace for ladders

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0135666A2 (en) * 1983-09-29 1985-04-03 Andral Corporation Convertible fold-up ladder
EP0135666A3 (en) * 1983-09-29 1986-02-12 Andral Corporation Convertible fold-up ladder
US20040231920A1 (en) * 2003-05-22 2004-11-25 Meeker Paul K. Rigidified step ladder
US7108103B2 (en) * 2003-05-22 2006-09-19 Cosco Management, Inc. Rigidified step ladder
US9765570B2 (en) 2014-07-14 2017-09-19 Otten & Otten Construction Limited Brace for step ladder

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