US1181303A - Mounting for ladder-rungs. - Google Patents

Mounting for ladder-rungs. Download PDF

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US1181303A
US1181303A US7464316A US7464316A US1181303A US 1181303 A US1181303 A US 1181303A US 7464316 A US7464316 A US 7464316A US 7464316 A US7464316 A US 7464316A US 1181303 A US1181303 A US 1181303A
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Prior art keywords
rung
ladder
ferrule
rungs
rail
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US7464316A
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Frank A Froehlich
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/087—Connections between rungs or treads and longitudinal members with a connecting piece installed around the rung
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
    • F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/40—Clamping arrangements where clamping parts are received in recesses of elements to be connected
    • F16B2200/406—Clamping parts being collars, bushings or wedges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms
    • F16B9/026—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B9/00—Connections of rods or tubular parts to flat surfaces at an angle
    • F16B9/05—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member
    • F16B9/054—Connections of rods or tubular parts to flat surfaces at an angle by way of an intermediate member the intermediate member being threaded

Definitions

  • the present invention relates to ladder construction, or means for mountmg or securing the rungs to the side ralls of the ladder, and has for an object to provide means for quickly assembling the rungs in a ladder, which is of substantlal strength, and gives even greater support and rigldlty to themselves were extended laterally through the side rails, which admits of the qulck detachment of the rungs individually from between the side rails, and the replacement of rungs therebetween, so that repairs may be quickly made without disturbing the position of the ladder and within a few mmutes, and to provide a mounting for the rungs,
  • Each side rail of the ladder has an opening transversely thereof of the usual size to receive the ladder rung, but through which is passed a bolt or pm for engagement in the outer end of the ferrule to hold the ferrule rigidly against the inner side of the adjacent ladder rail and .thus provide a support, which is rigid and possesses even greater strength than in those structures where the rungs are extended at their ends into and through the side rails of the ladder.
  • n- Figure 1 is a fragmentary new of a ladder, showing the side rail, a rung, and the improved moimting for the rung, the parts being shown in elevation.
  • Fig. 2 is a similar view disclosing the parts in section.
  • Fig. 3 is a transverse sectional view, taken through the rung inwardly of the attaching ferrule, and on the line 3-3 of Fig. 2.
  • Fig. at is a detail longitudinal central sectional view of the coupling or attaching ferrule.
  • Fig. 5 is a detail side elevational view of one end of the rung.
  • Fig. 6 is a detail side elevational view of the attaching bolt or pin.
  • Fig. 7 is an outer end elevation of the same, showing the wrench receiving openings in the head thereof.
  • 10 designates one of the side rails of a ladder, which is of the usual construction, and which is provided with the usual transverse opening 11, which in the ordinary construction of ladders receives therethrough the adjacent end of the rung.
  • the present invention provides a rung 12 of the usual wooden type used in hand or aerial ladders by fire departments, and the like, and which is substantially an inch in diameter, and which, as shown in Fig. 5, is provided upon its end with a coarse screw threaded portion 13.
  • the threaded portion 13 is accordingly made relatively coarse to provide substantial wood screw threads.
  • a ferrule 1 1 Upon each end of the rung 12, there is permanently mounted a ferrule 1 1, the inner end of which has coarse wood screw threads 15 adapted to en gage over the threaded portion 13 of the rung, and to be tightened thereon, as shown in Fig. 3, whereby to securely mount the ferrule on the end of the rung.
  • the ferrule 11 is provided with a base flange 16, Which is outturned from the outer end of the ferrule, and which has its outer face co-extensive with the outer end of the ferrule, to provide a. relatively wide bearing face for engagement against the inner side of the adjacent rail 10 to rigidly connect the rung 12 to the rail 10 and provide a ladder structure which is substantial and solid. It is a feature of the invention to secure this rung to the side rail by means which is of substantially the same thickness, diameter, and strength as that of the end of the rung, and even more so. To this end the usual opening 11 in the side rail 10 is provided, and, fitted in this opening 11, is a connecting bolt or pin 17 of substantially one inch in diameter, and adapted to fit snugly in the opening 11.
  • the body portion of the bolt or pin 17 is smooth and cylindrical, so as to turn freely in the opening 11, while the outer end of the bolt 17 is provided with machine screw threads 18, adapted to engage in the outer end of the ferrule 1d and interlock with correspondingly formed machine screw threads 19 provided in the outer end or half of the ferrule.
  • the bolt or pin 17 has a relatively fiat head 20 adapted to lie flat against the outer side of the rail 10, and has a rounded outer surface, so as to ward ofi objects coming in contact with the side rail and prevent any abrupt edges or shoulders.
  • This head 20 is preferably provided at diametrically opposed and spaced apart points with openings 21 adapted to receive therein the projections or prongs of a wrench, or other suitable instrument, which may be used for turning the bolt 17 in securing rungs to the ladder, or in removing rungs therefrom.
  • the rung is secured to the rail by the bolt 17, which is of the same thickness or diameter as the rung itself, and is preferably made of metal, such as aluminium, and therefore, has greater strength and durability than the end of the rung itself.
  • the ferrule with its base flange 16 is considerably larger and of substantial diameter, so that when the bolt binds the ferrule against the inner side of the rail 10, the ferrule 1a is held rigidly and securely against the side rail and a strong, solid structure is produced.
  • the ferrule 14' is of the same thickness or diameter as the rung itself, and is preferably made of metal, such as aluminium, and therefore, has greater strength and durability than the end of the rung itself.
  • the rung 12 also provides for a substantial support for the end of the rung 12, as it receives therein a relatively long portion of the end of the rung, and the rung 12 itself is thus rendered stronger and more capable of supporting the weight placed upon it, as the rung is shorter and the points of engagement or support for the rung are closer together, owing to the inward extension of the (fierrules 14 at the opposite sides of the lad- It is designed to construct the ferrule 1 1 and the bolt 17 of aluminium, or other light metal, so that the desired strength and durability may be had, and at the same time the necessary lightness in weight is adhered to throughout the entire ladder construction.
  • a new rung may be quickly placed in the ladder by simply unscrewing the bolts 17 at the opposite sides of the rails 10, and the rung with its ferrules 14 be slipped either forwardly or backwardly from between the rails 10.
  • the new rung may now be easily slipped in between the side rails 10 of the ladder and brought into registry with the openings 11 thereof, as the bolts'17 may now be passed inwardly and engaged in the outer ends of the ferrules 1% to bind the same against the side rails, and to hold the side rails from spreading apart or contracting, and to also prevent any swinging of the side rails out of their true transverse position with respect to the axis of the rung 12.
  • the entire ladder may be built up or knocked down, one or more rungs may be removed and replaced, or one of the side rails may be removed, in a few minutes, which with ladders now in general use it requires hours, repairs or remove the ladders.
  • a side rail having the usual rung receiving opening therethrough, a rung, a ferrule having its opening of uniform diameter from end to end, and engaging at one end over the end of said rung to be carried thereby, an outwardly extending flange on the outer end of the ferrule to seat against the inner face of the side rail and provide a substantial base for the ferrule, and a securing bolt of the diameter of the rung extending inwardly through the said opening in the side rail and engaging in the outer end of said ferrule to bind the latter against the side rail and hold the rung rigidly in place.
  • a side rail having the usual rung receiving opening therethrough, a ferrule engaging against the inner face of said side rail in registry with said opening, and having an interior bore of substantially the diameter of the opening and being coarse screw threaded at the inner end of the ferrule and being machine screw threaded at the outer end of the ferrule, a rung having a coarse screw threaded end adapted for engagement in the inner end of said ferrule, and a bolt extending inwardly through said rung receiving opening in the side rail and engaging in threaded relation in the outer end of said ferrule to bind the latter against the side rail, the said bolt havinga relatively fiat head engaging againstthe outer side of said rail and having wrench receiving openings therein to admit the ready turning of the bolt.

Description

F. A. FROEHLICH.
MOUNTING FOR LADDER RUNGS. APPLICATION FILED JAN-27.1916.
1,181 ,303 Patented May 2, 1916.
' Fig.1.
A ltomey the ladder and the rungs than if the rungs E1) %TATE@ PATEl MOUNTING FOR LADDER-RUNGS.
Specification of Letters Patent.
Patented May 2, 1916.
Application filed January 27, 1916. Serial No. 74,643.
To all whom it may concern:
7 Be it known that I, FRANK A. FRoEHLIoH,
' Rungs, of which the following is a specification.
The present invention relates to ladder construction, or means for mountmg or securing the rungs to the side ralls of the ladder, and has for an object to provide means for quickly assembling the rungs in a ladder, which is of substantlal strength, and gives even greater support and rigldlty to themselves were extended laterally through the side rails, which admits of the qulck detachment of the rungs individually from between the side rails, and the replacement of rungs therebetween, so that repairs may be quickly made without disturbing the position of the ladder and within a few mmutes, and to provide a mounting for the rungs,
wherein the side rails of the ladder do not have to be spread apart to receive the ends of the rungs.
Incarrying out the above and other objects and advantages of th1s invent on, the improvement contemplates; the provlsion of ladder rungs of the usual wood formation,
which carry upon their opposite ends ferrules adapted for engagement against the opposite inner sides of the rails of the ladder and which have openings extending entirely through the same. Each side rail of the ladder has an opening transversely thereof of the usual size to receive the ladder rung, but through which is passed a bolt or pm for engagement in the outer end of the ferrule to hold the ferrule rigidly against the inner side of the adjacent ladder rail and .thus provide a support, which is rigid and possesses even greater strength than in those structures where the rungs are extended at their ends into and through the side rails of the ladder.
The above and other objects and advantages of this invention will be brought out in the following detail descriptlon of the present preferred embodiment of thls 1nvention, the same being illustrated in the accompanying drawing, where1 n- Figure 1 is a fragmentary new of a ladder, showing the side rail, a rung, and the improved moimting for the rung, the parts being shown in elevation. Fig. 2 is a similar view disclosing the parts in section. Fig. 3 is a transverse sectional view, taken through the rung inwardly of the attaching ferrule, and on the line 3-3 of Fig. 2. Fig. at is a detail longitudinal central sectional view of the coupling or attaching ferrule. Fig. 5 is a detail side elevational view of one end of the rung. Fig. 6 is a detail side elevational view of the attaching bolt or pin. Fig. 7 is an outer end elevation of the same, showing the wrench receiving openings in the head thereof.
' Referring to this drawing, wherein like parts are designated by similar numerals of reference throughout the several views, 10 designates one of the side rails of a ladder, which is of the usual construction, and which is provided with the usual transverse opening 11, which in the ordinary construction of ladders receives therethrough the adjacent end of the rung.
The present invention provides a rung 12 of the usual wooden type used in hand or aerial ladders by fire departments, and the like, and which is substantially an inch in diameter, and which, as shown in Fig. 5, is provided upon its end with a coarse screw threaded portion 13. As the rung 12 is made of wood, the threaded portion 13 is accordingly made relatively coarse to provide substantial wood screw threads. Upon each end of the rung 12, there is permanently mounted a ferrule 1 1, the inner end of which has coarse wood screw threads 15 adapted to en gage over the threaded portion 13 of the rung, and to be tightened thereon, as shown in Fig. 3, whereby to securely mount the ferrule on the end of the rung. The ferrule 11 is provided with a base flange 16, Which is outturned from the outer end of the ferrule, and which has its outer face co-extensive with the outer end of the ferrule, to provide a. relatively wide bearing face for engagement against the inner side of the adjacent rail 10 to rigidly connect the rung 12 to the rail 10 and provide a ladder structure which is substantial and solid. It is a feature of the invention to secure this rung to the side rail by means which is of substantially the same thickness, diameter, and strength as that of the end of the rung, and even more so. To this end the usual opening 11 in the side rail 10 is provided, and, fitted in this opening 11, is a connecting bolt or pin 17 of substantially one inch in diameter, and adapted to fit snugly in the opening 11. The body portion of the bolt or pin 17 is smooth and cylindrical, so as to turn freely in the opening 11, while the outer end of the bolt 17 is provided with machine screw threads 18, adapted to engage in the outer end of the ferrule 1d and interlock with correspondingly formed machine screw threads 19 provided in the outer end or half of the ferrule. The bolt or pin 17 has a relatively fiat head 20 adapted to lie flat against the outer side of the rail 10, and has a rounded outer surface, so as to ward ofi objects coming in contact with the side rail and prevent any abrupt edges or shoulders. This head 20 is preferably provided at diametrically opposed and spaced apart points with openings 21 adapted to receive therein the projections or prongs of a wrench, or other suitable instrument, which may be used for turning the bolt 17 in securing rungs to the ladder, or in removing rungs therefrom.
With the device of this construction, it will be noted that the rung is secured to the rail by the bolt 17, which is of the same thickness or diameter as the rung itself, and is preferably made of metal, such as aluminium, and therefore, has greater strength and durability than the end of the rung itself. It will also be noted that the ferrule with its base flange 16 is considerably larger and of substantial diameter, so that when the bolt binds the ferrule against the inner side of the rail 10, the ferrule 1a is held rigidly and securely against the side rail and a strong, solid structure is produced. The ferrule 14'. also provides for a substantial support for the end of the rung 12, as it receives therein a relatively long portion of the end of the rung, and the rung 12 itself is thus rendered stronger and more capable of supporting the weight placed upon it, as the rung is shorter and the points of engagement or support for the rung are closer together, owing to the inward extension of the (fierrules 14 at the opposite sides of the lad- It is designed to construct the ferrule 1 1 and the bolt 17 of aluminium, or other light metal, so that the desired strength and durability may be had, and at the same time the necessary lightness in weight is adhered to throughout the entire ladder construction.
When, for any reason, a rung should break, or wear out, or burn out, a new rung may be quickly placed in the ladder by simply unscrewing the bolts 17 at the opposite sides of the rails 10, and the rung with its ferrules 14 be slipped either forwardly or backwardly from between the rails 10. The new rung may now be easily slipped in between the side rails 10 of the ladder and brought into registry with the openings 11 thereof, as the bolts'17 may now be passed inwardly and engaged in the outer ends of the ferrules 1% to bind the same against the side rails, and to hold the side rails from spreading apart or contracting, and to also prevent any swinging of the side rails out of their true transverse position with respect to the axis of the rung 12.
There is thus provided a substantial structure which not only supports the rungs rigidly between the side rails, but which also provides a rigid brace for the side rails. No additional bracing rods, or the like, are necessary with the present rung mounting.
The entire ladder may be built up or knocked down, one or more rungs may be removed and replaced, or one of the side rails may be removed, in a few minutes, which with ladders now in general use it requires hours, repairs or remove the ladders.
It is, of course, understood that all such changes in form and the side rails or rungs of and sometimes days, to make design may be made,
without departing from the spirit of this invention, which is permissible within the scope of the following claims.
What is claimed is 1. In a ladder, a side rail having the usual rung receiving opening therethrough, a rung, a ferrule having its opening of uniform diameter from end to end, and engaging at one end over the end of said rung to be carried thereby, an outwardly extending flange on the outer end of the ferrule to seat against the inner face of the side rail and provide a substantial base for the ferrule, and a securing bolt of the diameter of the rung extending inwardly through the said opening in the side rail and engaging in the outer end of said ferrule to bind the latter against the side rail and hold the rung rigidly in place.
2. In a ladder, a side rail having the usual rung receiving opening therethrough, a ferrule engaging against the inner face of said side rail in registry with said opening, and having an interior bore of substantially the diameter of the opening and being coarse screw threaded at the inner end of the ferrule and being machine screw threaded at the outer end of the ferrule, a rung having a coarse screw threaded end adapted for engagement in the inner end of said ferrule, and a bolt extending inwardly through said rung receiving opening in the side rail and engaging in threaded relation in the outer end of said ferrule to bind the latter against the side rail, the said bolt havinga relatively fiat head engaging againstthe outer side of said rail and having wrench receiving openings therein to admit the ready turning of the bolt.
3. In combination with a rail having an opening therein, a rung having its end threaded, a ferrule having a threaded opening, one end of which receives the threaded as my own, I have hereto afiixed my signaend of the rung, and a bolt passed through ture in the presence of two Witnesses. the openlng of the side rail, and having its head engaging the side rail, and its threaded FRANK FROEHLICIL 5 end engaging the threaded opening of the Witnesses:-
ferrule. JOHN DEVLIN,
In testimony, that I claim the foregoing HERMANN WALZER.
Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O.
US7464316A 1916-01-27 1916-01-27 Mounting for ladder-rungs. Expired - Lifetime US1181303A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5127764A (en) * 1991-04-24 1992-07-07 Shop Vac Corporation Clip ring spread preventer
DE29606847U1 (en) * 1996-04-16 1996-07-04 Hasenbach Lorenz Gmbh Co Kg Ladder stile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5127764A (en) * 1991-04-24 1992-07-07 Shop Vac Corporation Clip ring spread preventer
DE29606847U1 (en) * 1996-04-16 1996-07-04 Hasenbach Lorenz Gmbh Co Kg Ladder stile

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