The present invention relates to a system and method for using safety rails for a ladder and more specifically, adjustable safety rails mountable to an extension ladder.
Stabilizers for ladders may provide extra support in maintaining a ladder in a specific position against a structure. The stabilizer may also provide a usable space between the ladder and the surface of the structure, such as when a painter needs to paint the surface on which the ladder is rested. However, the stabilizer provides stabilization for the ladder, not for the user. When a user needs to stabilize themselves on a ladder, the ladder rails or surface to which it leans are the only options. Moreover, when a user reaches the top portion of the ladder and must step off one of the top rungs, the user must balance themselves during that movement, sacrificing the safety of the user.
Bearing in mind the problems and deficiencies of the prior art, it is therefore an object of the present invention to provide a ladder safety system which allows a user to safely dismount the ladder from the top of the ladder by providing additional support.
It is another object of the present invention to provide the user with the stability and confidence to make a smooth, safe transition from the ground or base level to firm footed position on an elevated surface.
A further object of the invention is to provide stability while using the ladder as the platform while performing specific tasks.
It is yet another object of the present invention to provide a ladder safety system which when not in use, collapses to a compact footprint for transport and storage.
It is still another object of the present invention to provide a ladder safety system which allows a user to adjust the position of hand rails above the top of the ladder.
It is another object of the present invention to provide a fastener assembly which secures a cylindrical member to a surface in a rotatable or non-rotatable state.
Still other objects and advantages of the invention will in part be obvious and will in part be apparent from the specification.
The above and other objects, which will be apparent to those skilled in the art, are achieved in the present invention which is directed to a collapsible ladder safety system for a ladder having first and second vertical ladder rail and a plurality of step rungs extending between the first and second vertical rails, the system comprising first and second upright tubular hand rails and a cross member pivotally attached to each of the first and second parallel upright tubular hand rails, the tubular hand rails or cross member being releasably securable to an upper end of the ladder. The first and second upright tubular hand rails are collapsible against the cross member when not secured to the ladder. The collapsible ladder safety system may include a curved portion at an upper end of the first and second upright tubular hand rail. The collapsible ladder safety system may include a first and second pair of pivot clamps, the pivot clamps including a circular sleeve slidingly attached to the upright tubular member and a pin extending outward from the circular sleeve into an opening on the cross member. The collapsible ladder safety system may include a tension knob attached to each pivot clamp for adjusting the friction between the circular sleeve and the upright tubular member. The collapsible ladder safety system may include a lower brace member pivotally attached to each of the first and second upright tubular members, the lower brace member being parallel to the cross member. The first and second upright tubular members may be nearly parallel to the cross member when the system is in a closed position and the first and may be perpendicular to the cross member when the system is an opened position with the upright tubular hand rails fully secured to the ladder. The collapsible ladder safety system may include a support arm extending from each end of the cross member toward a surface for which the ladder is meant to lean against.
Another embodiment of the present invention is directed to a collapsible ladder safety system for a ladder having first and second vertical ladder rail and a plurality of step rungs extending between the first and second vertical rails, the system comprising first and second upright tubular hand rails, a curved portion at an upper end of the first and second upright tubular hand rail, and a cross member pivotally attached to each of the first and second upright tubular hand rails, the tubular hand rails or cross member being releasably securable to an upper end of the ladder. The collapsible ladder safety system may include a support arm extending from each end of the cross member toward a support wall for which the ladder is meant to lean against. The collapsible ladder safety system includes a lower brace member pivotally attached to each of the first and second upright tubular members, the lower brace member being parallel to the cross member, a first and second pair of pivot clamps, the pivot clamps including a circular sleeve slidingly attached to the upright tubular member and a pin extending outward from the circular sleeve into an opening on the cross member or the lower brace, and a tension knob attached to each pivot clamp for adjusting the friction between the circular sleeve and the upright tubular member. The first and second upright tubular members are nearly parallel to the cross member when the system is in a closed position and the first and second upright tubular hand rails are perpendicular to the cross member when the system is an opened position. The cross member may be attachable to the ladder rails or to at least one of the ladder step rungs. The upright tubular hand rails may be rotatable within the circular sleeve and rotation tension may be adjustable with the tension knob. The upright tubular hand rails may be vertically slidable within the circular sleeve and slide tension may be adjustable with the tension knob. The upright tubular hand rails may extend below the support arms and may be spaced away from the ladder rails sufficient for a user to grasp around the entire circumference of the tubular hand rail. The upright tubular hand rails may extend below the lower brace member.
Another embodiment of the present invention is directed to a method for using a collapsible ladder safety system for a ladder having first and second vertical ladder rail and a plurality of step rungs extending between the first and second vertical rails. The method comprises providing first and second parallel upright tubular hand rails, a curved portion at an upper end of the first and second parallel upright tubular hand rail, a cross member pivotally attached to each of the first and second upright tubular hand rails, a support arm extending from each end of the cross member toward a support wall for which the ladder is meant to lean against, a lower brace member pivotally attached to each of the first and second upright tubular hand rails, the lower brace member being parallel to the cross member, a first and second pair of pivot clamps, the pivot clamps including a circular sleeve slidingly attached to the upright tubular member and a pin extending outward from the circular sleeve into an opening on the cross member or the lower brace and a tension knob attached to each pivot clamp for adjusting the friction between the circular sleeve and the upright tubular hand rail. The method includes moving the first and second upright tubular hand rails from a closed position wherein the first and second upright tubular hand rails are nearly parallel to the cross member to a second open position wherein the first and second upright tubular hand rails are perpendicular to the cross member. The method includes securing the first and second upright tubular hand rails or the cross member to an upper portion of the ladder, placing the support arms against a wall or roof and adjusting the first and second parallel upright tubular hand rails to provide support for a user. The method may include the step of removing the first and second upright tubular hand rails or the cross member from the upper portion of the ladder when the user is finished using the ladder. The method may include the step of moving the first and second upright tubular hand rails from the second position to the first closed position.
Another embodiment of the present invention is directed to the collapsible ladder safety system as described above in combination with a fastening assembly for securing a cylindrical member to a surface, the fastening assembly comprising a cylindrical riser having a length and a central opening extending axially through the length of the cylinder. The cylindrical riser comprises a circular aperture having a diameter larger than diameter of the central opening, the circular aperture extending from a top end of the cylindrical riser to a distance less than the length of the cylindrical riser, a first cylindrical groove extending across the top surface of the cylindrical riser and a second cylindrical groove co-axially aligned with the first cylindrical groove and having a diameter larger than the first cylindrical groove. The fastening assembly includes a spring disposed in the aperture and a ring having a shaft extending radially from an arc of the ring, the shaft including external threads at a distal end thereof, the shaft extending through the spring, the cylindrical riser central opening and an opening in the surface to which the cylindrical member is secured. The fastening assembly includes a tension knob engagable with the threads of the shaft wherein the tension knob is disposed on the opposite side of the surface than the cylindrical riser. The ring is fully engaged with the second cylindrical groove when the fastening assembly is in a tightened position and the ring is partially engaged with the second cylindrical groove when the fastening assembly is in a loosened position. The cylindrical member is rotatable about the opening in the surface when the fastening assembly is in the loosened position and the cylindrical member is non-rotatably secured to the surface when the fastening assembly is in the tightened position.
Another embodiment of the present invention is directed to a fastening assembly for securing a cylindrical member to a surface, the fastening assembly comprising a cylindrical riser having a length and a central opening extending axially through the length of the cylinder. The cylindrical riser comprises a circular aperture having a diameter larger than diameter of the central opening, the circular aperture extending from a top end of the cylindrical riser to a distance less than the length of the cylindrical riser. The cylindrical riser comprises a first cylindrical groove extending across the top surface of the cylindrical riser and a second cylindrical groove co-axially aligned with the first cylindrical groove and having a diameter larger than the first cylindrical groove. The cylindrical riser comprises a spring disposed in the aperture, a ring having a shaft extending radially from an arc of the ring, the shaft including external threads at a distal end thereof, the shaft extending through the spring, the cylindrical riser central opening and an opening in the surface to which the cylindrical member is secured, and a tension knob engagable with the threads of the shaft wherein the tension knob is disposed on the opposite side of the surface than the cylindrical riser. The ring is fully engaged with the second cylindrical groove when the fastening assembly is in a tightened position and the ring is partially engaged with the second cylindrical groove when the fastening assembly is in a loosened position. The cylindrical member is rotatable about the opening in the surface when the fastening assembly is in the loosened position and the cylindrical member is non-rotatably secured to the surface when the fastening assembly is in the tightened position.
Another embodiment of the present invention is directed to a method of securing a cylindrical member to a surface comprising providing the fastening assembly as described above, providing a surface and a cylindrical member to secure to the surface and ensuring the ring shaft extends through the spring, riser opening and an opening in the surface. The method includes engaging the tension knob with the threads of the shaft, sliding the cylindrical member through the ring, tightening the tension knob until the cylindrical member is prevented from sliding through the ring and the rotating about the surface opening and partially loosening the tension knob to allow the cylindrical member to slide through the ring and rotate about the surface opening.
The features of the invention believed to be novel and the elements characteristic of the invention are set forth with particularity in the appended claims. The figures are for illustration purposes only and are not drawn to scale. The invention itself, however, both as to organization and method of operation, may best be understood by reference to the detailed description which follows taken in conjunction with the accompanying drawings in which:
In describing the preferred embodiment of the present invention, reference will be made herein to
The ladder safety system as shown in the exploded view of
The cross member 20 is an elongated tube or bar 22 with a curved portion 24 and a support arm 26 extending perpendicular to the elongated bar 20 at each end of the elongated bar 20. Support arm end caps 51 may be disposed on the distal end of the support arm 26. Alternately, a boot or other covering may be placed on the outside of support arm 26 for protecting the surface to which the support arm 26 is to be placed against. The boot may also help in preventing the ladder from sliding sideways. Bottom end caps 54 may be disposed on the bottom end of the hand rails 30 and handle end caps 56 may be disposed on the open ends of the straight handle portion 36.
To transport the ladder safety system when not attached to the ladder, the cross member 20 and hand rails 30, 31 are folded against each other.
To descend from the elevated surface, the user may grab the left or right hand rail while in a backward position. The user may orient himself with the elevated surface and the top rung of the ladder. With his free hand, the user may grab the other hand rail and start the descent. As the user reaches the bottom of the hand rails, the user would transition his hands back to the ladder and complete the descent.
If the hand rails 30, 31 are not needed for a particular task, the two hand rails may be removed, leaving the cross member 20 to support the ladder against the vertical surface which the support arms 26 contact.
In a method of using the ladder safety system, the system shown mounted on the upper end of a ladder 90 in
This configuration now allows the user to climb the ladder in the normal fashion. As the user reaches the bottom of the hand rails, the hands transition from the ladder to the hand rails 30, 31 as the user ascends. The user may alternately transition hand placement from the ladder to the elevated surface while holding on to the hand rails 30, 31. Once firm footing is established, the user can release his or her grip from the hand rails 30, 31. The hand rails 30, 31 may be rotated as shown by the rotation arrows 41, 43 in
The ladder safety system may also be used with only one hand rail attached, or one hand rail completely retracted to a shorter length than the other. Hand rail 30 or hand rail 31 may be removed by rotating the tension knobs 46 off the pivot clamp shaft 44 and removing the pivot clamps or by releasing the tension on the tension knobs 46 and sliding the hand rail 30 or hand rail 31 from the pivot clamp circular sleeve 42.
For removal of the ladder safety system from the ladder 90, the ladder 90 may be placed so the system is easily accessible, such as placing the ladder 90 along the ground. The U-bolts 60 and securing plate 72 are removed from the cross member 20 and the lower brace 60. The ladder 90 may then be lifted from the ladder safety system or the ladder safety system may be lifted from the ladder 90, depending on the position of the ladder 90 on the ground. The tension knobs 46 are then rotated counter clockwise until the tension is released. The ladder safety system may then be collapsed by rotating the hand rails 30, 31 about the pivot clamp shaft 44.
In one embodiment of the pivot clamp, an improved fastening system is shown in the exploded views of
The fastening system includes a spring 130 disposed in the aperture 110. The bottom of the circular aperture 110, includes a seat 112 formed by the end of opening 108 for engaging and supporting the bottom end of spring 130. The fastening system includes a ring 122 having a shaft 124 extending radially from an arc of the ring 122, the shaft 124 including external threads 136 at the end opposite the ring 122. As shown in
A method of using the fastening assembly shown in
The present invention as describe above provides a ladder safety system which allows a user to have additional support to safely dismount the ladder from the top of the ladder. The present invention also provides the user with the stability and confidence to make a smooth, safe transition from the ground or base level to firm footed position on an elevated surface. Stability while using the ladder as the platform while performing specific tasks is also provided. The present invention also provides a ladder safety system which when not in use, collapses to a compact footprint for transport and storage as well as providing a ladder safety system which allows a user to adjust the position of hand rails above the top of the ladder. The present invention also provides a fastener assembly which secures a cylindrical member to a surface in a rotatable or non-rotatable state
While the present invention has been particularly described, in conjunction with a specific preferred embodiment, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. It is therefore contemplated that the appended claims will embrace any such alternatives, modifications and variations as falling within the true scope and spirit of the present invention.
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