Elements for interconnection of ends of profiles at corners in frames, panel points and the like

Claim 2

An unitary element for interconnecting the ends of frame sections at corners in frames, panel points and the like, comprising at least two legs arranged at right angles to each other, each having in common an inner and an outer angle wall said angle walls being opposed to each other and defining an intermediate space therebetween and inclined end walls connected to the corresponding ends of the angle walls in each leg, the inner and outer angle walls forming inner and outer adjacent apex points, respectively, at a corner angle of the legs, said element further comprising means for forcing the apex points of the angle walls apart so as to impart in each leg a dislacement of the angle walls relative to each other which, in cooperation with the inclined end walls of the legs, causes contemporary and substantially equal expansion force to be applied so as to expand both legs in the ends of the respective frame sections to fasten the frame sections together.

Claim 3

The element according to claim 1, wherein said forcing means is a screw threaded through the apex of one of the angle walls and adapted to force the apexes of both of the angle walls away from each other.

Claim 4

The element according to claim 1, wherein the outer angle wall is the angle wall bordering the exterior of the angle defined by the legs, and wherein the inclined end wall in each leg forms an acute angle with the end of the corresponding outer angle wall.

Claim 5

An unitary element for interconnecting the ends of frame sections at corners in frames, panel points and the like, comprising four legs arranged in a cross configuration, one pair of adjacent legs at an angle to each other and each having in common an inner and an outer angle wall said angle walls being opposed to each other and defining an intermediate space therebetween and inclined end walls connected to the corresponding ends of the angle walls in each leg, the inner angle wall which borders the interior space of the angle defined by the pair of legs forming an inner apex point, and the other pair of adjacent legs having the same arrangement of inner, outer, and inclined end walls as the one pair, the arrangements of both pairs being joined back-to-back along a common axis of their respective outer walls to form the cross configuration, said element further comprising means for drawing the inner apex points of the respective arrangements toward each other so as to impart in each of the four legs a displacement of the walls relative to each other which, in cooperation with the inclined end walls of the respective legs, causes contemporary and substantially equal force to be applied so as to expand the legs in the ends of the respective frame sections to fasten the frame sections together.

Claim 6

An unitary element for interconnecting the ends of frame sections at corners in frames, panel points and the like, comprising four legs arranged in a cross configuration, one pair of adjacent legs at an angle to each other and each having in common an inner and an outer angle wall said angle walls being opposed to each other and defining an intermediate space therebetween and inclined end walls connected to the corresponding ends of the angle walls in each leg, the inner angle wall which borders the interior space of the angle defined by the pair of legs forming an inner apex point, and the other pair of adjacent legs having the same arrangement of inner, outer, and inclined end walls as the one pair, the arrangements of both pairs being joined back-to-back along a common axis of their respective outer walls to form the cross configuration, said element further comprising means for drawing the inner apex points of the respective arrangements toward each other so as to impart in each of the four legs a displacement of the walls relative to each other which, in cooperation with the inclined end walls of the respective legs, causes contemporary and substantially equal force to be applied so as to expand the legs in the ends of the respective frame sections to fasten the frame sections together.

Claim 7

The element according to claim 4, wherein the inclined end walls of the respective legs form acute angles with the ends of the corresponding inner angle walls.