Abstract: A positioning joint for a folding ladder comprising a first joint member, a second joint member, an operating lever pivotably connected to the first joint member and U-shaped members acting as a control means. The U-shaped member has a sustaining portion and two bolt receiving portions each with a central bore which is embodied in the shape of an ellipse. The joint members, lever and U-shaped member are pivotably interconnected permitting engagement and disengagement of spring and pawl units with the U-shaped member for thereby locking and unlocking the joint.

Abstract: A positioning joint for a folding ladder comprising a first joint member, a second joint member disposed between the first joint member, and a hollow shaft inserted into central holes of the first and second joint members. The joint further includes a turning plate disposed on an inner wall of a first disc portion of the first joint member, a crank-shaped strip, and a spring mounted around the hollow shaft. A push knob is inserted into the hollow shaft, and a pin is inserted into a pair of axially elongated holes in the hollow shaft and into a pin hole in the push knob. The crank-shaped strip has a pair of small projections adapted to be inserted into engaging holes of the first and second joint members as well as a pair of large projections adapted to be inserted into the first and second joint members and the turning plate. The crank-shaped strip also has a central portion fixed between the hollow shaft and the spring.

Abstract: A refuse receptacle having a refuse collecting bag mounted therein comprising a continuous elongated vinyl sleeve folded several times on itself in fanfold manner to an appropriate length outwardly and inwardly by turns starting from one end thereof. The other end of the folded vinyl sleeve is tied and pulled downwardly for receiving refuse directly.