zhongxinladder

Set the ladder at the proper angle by creating a right triangle with your body, as shown in the photo.
Make sure the feet of the ladder can’t slip backward. On soft ground, flip up the ladder shoes so the spurs poke into the ground. On decks, screw down a cleat.
Make sure the top of the ladder is resting on a flat surface and doesn’t slide or wobble when you put weight against When climbing the ladder grab onto the rungs of the Household ladder using a hand over hand method never letting go of one rung before before grabbing the next. Sliding your hands up the beam (side) of a ladder is unsafe because you may not have as secure a grasp as you would when using the rungs to climb with.

Ladders are known to be unstable and often require the assistance of a second person for steadying the ladder when a first person has climbed the ladder. However, another person is not always available when a ladder has to be used. There have been many devices made for Ladder stabilizer , and yet they do not solve the problems of being adjustable to all site conditions, convenient to use, easily installed on the ladder, compromising the integrity of the ladder, interfering with the use of the ladder, retractable and out of the way for storage, and providing stabilization when one side of the ladder is close to a wall.

U.S. Pat. No. 3,891,054 issued to Clayton E. Larson in 1975 discloses a step ladder stabilized by channel members which are fixed on each side of the lowest rung of the ladder and have an extendable member. Braces are provided at the upper rungs to provide rigidity and resistance against sway. However, it is not adjustable to all site conditions and adds very little stabilization to the ladder.

U.S. Pat. No. 4,964,488 issued to John V. Stewart on Oct. 23, 1990 discloses a step ladder stabilizer for a step ladder comprising a brace hinged to a ladder rail and an arm hinged to the rail at a lower position trussing the brace. The stabilizers on each side of the ladder fold against the front of the ladder. However, this Ladder stabilizer is not adjustable to all site conditions and it interferes with the use of the ladder when not in use.

U.S. Pat. No. 5,868,222, issued to Francois Charbonneau on Feb. 9, 1999 discloses an extension ladder having a telescopic tube mounted to each side of the ladder's lower section and a lateral brace to support the telescopic tube extending away from each side of the ladder. However, the telescopic tubes bolt to the ladder which may compromise the integrity of the ladder, it is not easily installed on the ladder, and it is cumbersome and inconvenient to use. Also, it has removable pins and clips which are easily lost.

U.S. Pat. No. 4,147,231, issued to Douglas A. Chantler et al. on Apr. 3, 1979 discloses a ladder stabilizing device connected on the outer sides of the side pieces of the ladder. The device comprises outwardly extensible legs having an upper leg part connected to a slide plate on the side of the ladder which adjusts up and down. A lower leg support-extends from the side of the ladder near the bottom and extends out to the upper leg part at its lower end. The upper and lower leg parts lie flat against the side of the ladder for storage when the ladder is not in use. However, this device lifts the ladder legs off the surface which eliminates the stability which otherwise would be provided by these legs. Also, this device is cumbersome and inconvenient to use.

U.S. Pat. No. 4,519,477, issued to Robert Ralston on May 28, 1984 discloses an adjustable stabilizer device for an extension ladder with hollow rungs comprising two stabilizing elements, an upper bracket and a lower bracket. Each stabilizing element connects to an upper right angle bracket which connects to a side wall bracket. The stabilizing elements are connected to each other by rods which extend through the hollow rungs of the ladder and attach to the side wall brackets. When the ladder is not in use the stabilizer elements are retained flush against the sides of the ladder for storage. However, this device is not adjustable to all site condition, is cumbersome and inconvenient to use, and has removable pins and clips which can be easily lost.

A ladder rung is a step of a ladder. When most people think of the word ladder, a very specific image comes to mind, most likely of a Aluminum step ladder ， known as a fixed ladder. This type consists of two long pieces of wood, metal or plastic on each side that are connected by a series of rungs, which can be of the same or different material. There are, however, many different styles of ladders, some of which are designed for more specific purposes, and others which are multi-purpose. The rungs of these ladders can also be unique in several different ways, mostly depending on the function and construction of the ladder.

A fixed ladder can be made of wood or lightweight metal, with each individual ladder rung consisting of the same material. The rungs are spaced an equal distance from one another, and they are typically anywhere from 10 inches (25.4 cm) to 12 inches (30.5 cm) apart, but can be more or less. Ladders with 12- inch-spaced rungs are not usually built in lengths that are divisible by 12, however, so the distance from the top and bottom rungs to the ends of the ladder will usually be different from one another, and will be shorter than the spaces between each ladder rung.

The shape of a ladder rung will vary from ladder to ladder. A cylinder is a common rung shape that is found on many ladders, both metal and wood. Because of its roundness, however, it may be difficult to stand in one place without proper shoes, so the function of ladder rungs with circular, or ovular, cross sections is mainly for climbing up and down. Metal circular rungs are often covered with a gritty, sandpaper-like finish for a better grip while standing on the ladder rung.

Household step ladders , or folding ladders, are more popular for use when someone wants to stand in one place. These are designed with hinges at the top and two or sometimes even three folding sides. A ladder rung on at least one side of a step ladder is usually designed with a flat top that is several inches in length for better support for a person standing on any rung. These rungs are flat so that it is just as easy for someone to do his or her necessary work while standing at any point on the ladder, and the rungs can be finished with slip-proof material to help prevent accidents.

 

 

from:townhall|step ladder

A step ladder stabilizer for mounting behind the front step portion and having two adjusting legs which adjust as a slide lock moves vertically within a slot attached to the rear of the ladder steps. When not in use, the ladder stabilizer closes flush against the back of the ladder steps. An alternate embodiment includes a ladder stabilizer for an extension ladder comprising an extending leg and a stabilizer arm with the top of the extending leg attaching to a slide lock that slides along a channel mounted on the side of the ladder. Bolts passing through expansion inserts hold the channel onto each side of the ladder.

A folding ladder can be a handy tool to have around the home. When unfolded, a Aluminum step ladder makes it possible to access hard to reach places. When folded, it can be easily stored away and kept out of site. There are several things you should consider when purchasing a folding ladder.
Setting up an extension ladder at the correct angle is the key to working safely on the walls or roof of your house. Make it too steep and the ladder could tip over backward. Give it too much angle and it could bend or the bottom could slide out. This article shows the right way to set up a ladder.

What is claimed as new and desired to be secured by Letters Patent of the United States is:

1. A ladder stabilizer for a step ladder comprising: a channel having a slot along a side of said channel; means for attaching said channel to a front step portion of said step ladder; means attached to said channel for mounting a pair of legs wherein said legs extend or retract in accordance with the movement of said mounting means along said slot of said channel; means attached between said pair of legs for fixing said legs in a spaced-apart position and for releasing said legs to enable said pair of legs to be retracted adjacent to said channel; and means for securing each leg of said pair of legs to said front step portion of said step ladder.

2. The stabilizer as recited in claim 1 wherein said attaching means comprises a slide lock bracket adapted to move along said slot of said channel.

3. The stabilizer as recited in claim 4 wherein said legs securing means comprises a first arm attached between a first one of said pair of legs and said front step portion of said household step ladders , and a second arm attached between a second one of said pair of legs and said front step portion of said step ladder.

4. A stabilizer for a step ladder comprising: a channel having an upper bracket and a lower bracket for mounting said channel to a front step portion of said step ladder; a slide lock bracket adapted to slide along said channel and be locked at a preferred position; a first leg of said stabilizer attached to a first side of said sliding lock bracket, said first leg extending downward away from said channel; a second leg of said stabilizer attached to a second side of said sliding lock bracket, said second leg extending downward away from said channel; a spreader bar attached between said first leg and said second leg; a first arm of said stabilizer having a first end attached to said first leg and a second end adapted to attach to said front step portion of said step ladder; and a second arm having a first end attached to said second leg and a second end adapted to attach to said front step portion of said step ladder.

5. The step ladder stabilizer as recited in claim 4 wherein said spreader bar comprises means for folding-up said spreader bar.

6. The step ladder stabilizer as recited in claim 4 wherein said slide lock bracket comprises means for securing said slide lock bracket along said channel at said preferred position to stabilize said step ladder.

7. The step ladder stabilizer as recited in claim 4 wherein each of said first leg and said second leg comprises an extension leg which extends from said first leg and said second leg to stabilize said step ladder.

8. The step ladder as recited in claim 4 wherein said stabilizer closes-up against said channel when said slide lock bracket is raised along said channel.

9. In combination: a step ladder having a front step section and a rear prop section, said rear prop section being movably attached to a top portion of said step ladder adjacent to said front step section; a step ladder stabilizers , attached to said front step section and extending between said front step section and said rear prop section to provide stabilization, comprising: a channel having an upper bracket and a lower bracket for mounting to said front step section of said step ladder, said channel having an opening running the length of said channel; a slide lock bracket adapted to slide along said opening of said channel and be locked at a preferred position; a first leg attached to a first side of said slide lock bracket, said first leg extending downward away from said channel; a second leg attached to a second side of said slide lock bracket, said second leg extending downward away from said channel; a spreader bar attached between said first leg and said second leg; a first arm having a first end attached to said first leg and a second end adapted to attach to said front section of said step ladder; and a second arm having a first end attached to said second leg and a second end adapted to attach to said front step section of said step ladder.

10. The combination as recited in claim 9 wherein said spreader bar comprises means for folding-up said spreader bar.

11. The combination as recited in claim 9 wherein said slide lock bracket comprises means for securing said slide lock bracket along said channel at said preferred position to stabilize said Aluminum step ladder .

12. The combination as recited in claim 9 wherein said step ladder stabilizer close-up against said front step portion of said step ladder when said slide lock bracket is raised along said channel.
13. A lever lock assembly comprising: a lever having means on an end of a right angled portion of said lever for griping a first surface when said lever is in a closed position; a frame for mounting said lever lock assembly to a second surface, said frame having an opening for said end of said right angled portion of said lever to enter; means for securing said right angled lever within a center portion of said frame to enable said lever to rotate about said securing means with said right angled portion of said lever protruding through said opening in said frame when said lever is in said closed position; and a U-shaped spring, one end attached to said frame below a handle portion of said lever and the other end positioned against an underside of said handle portion of said lever.

24. The lever lock assembly as recited in claim 23 wherein said griping means comprises a plurality of teeth on said end of a right angled portion of said lever.

25. The lever lock assembly as recited in claim 23 wherein said U-shaped spring comprises a U-shaped leaf spring.