|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||182/22 ; 182/46 ; 182/27 ; 182/163|
|발명자 / 주소|
|인용정보||피인용 횟수 : 6 인용 특허 : 3|
The invention is an adjustable folding ladder that can be easily altered in its length and shape to adjust to the proper working height and angles for the user. With the fiber glass nylon hinges, the ladder is insulated to prevent the user from electrical shocks in the event the ladder comes into contact with electrical wiring.
An adjustable folding ladder, said ladder comprising: A pair of uprights; A plurality of rungs supported by said uprights; and hinged joints made of fiber glass nylon providing electrical shock insulation, each composed of a male and a female hinge with matching teeth for close tollerance engagement, having handles with grooves, and having screws with either left-handed or right-handed threads to fit through the male hinge in the middle of its teeth and through a hole in the middle of the female hinge, said uprights being made of aluminum and including a...