초록 ▼

A hinge for connecting and adjustably holding two sections of a supporting element such as ladder segments in an angular orientation with respect to each other comprising a housing having at least two halves rotatable with respect to each other about an axis of rotation, a first half for holding one

A hinge for connecting and adjustably holding two sections of a supporting element such as ladder segments in an angular orientation with respect to each other comprising a housing having at least two halves rotatable with respect to each other about an axis of rotation, a first half for holding one of the sections and a second for holding the other section; means for mounting the housing halves for movement linearly along the axis of rotation between first and second positions along the axis of rotation; and a plurality of mating teeth on each housing half which engage to prevent rotation of the housing halves when the housing halves are in the first position while permitting rotation of the housing halves when the housing halves are in the second position. The hinge also includes biasing means in the form of a rod and cam arrangement for biasing the housing halves into the first position.

대표청구항 ▼

A hinge for connecting and adjustably holding two sections of a supporting element in an angular orientation with respect to each other comprising: a housing means having at least two halves rotatable with respect to each other about an axis of rotation, a first half for holding one of said sections

A hinge for connecting and adjustably holding two sections of a supporting element in an angular orientation with respect to each other comprising: a housing means having at least two halves rotatable with respect to each other about an axis of rotation, a first half for holding one of said sections and a second half for holding the other section; means for mounting said housing halves for movement linearly along said axis of rotation between first and second positions along said axis of rotation; interengaging means for preventing rotation of said housing halves when said housing halves are in said first position and permitting rotation of said housing halves when said housing halves are in said second position; and means for positioning said housing halves at one of a plurality of predetermined angular relationships therebetween, said positioning means mounted to one of said housing halves and capable of engaging the outer surface of said other housing half so that said positioning means in a first position normally prevents relative rotation between said halves by engaging the outer surface of said other housing half, and in a second position does not engage said outer surface of the other housing half to permit angular rotational movement between the housing halves.