Arrangement for connecting two profile members, particularly channel members for metal windows

DETAILED DESCRIPTION I claim: 1.
An arrangement for joining window frame members and the like, comprising a pair of frame strip members having in cross section a U-shaped receptor each of the arms of which having laterally inwardly directed projections, a connecting strip having in cross section a central portion and a catch lug at each end for entry within the receptor of an associated frame strip member, said catch lug being provided with outwardly directed projections on each of its lateral sides for cooperation with the inner edge of laterally inwardly directed projections of the associated receptor, a head portion, and a recess on each of its lateral sides between said outwardly directed projection and the head portion, said catch lug having a height less than the depth of said receptor, the cavity defined by said receptor and catch lug being adapted to receive a hardenable filler material whereby said strip frame members and said connecting strips are held securely.
2.
The arrangement according to claim 1 wherein the arms of said receptor have a free spring action to snap over said outwardly directed projections.
3.
The arrangement according to claim 1 wherein the outwardly directed projections are defined by a side wall starting from the head portion and inclined obliquely outward under a wedge angle of 15.
degree.
-30.
degree.
to the longitudinal axis of the catch lug and by a lock wall inclined transverse to the longitudinal axis and connecting the side wall with the central strip.
4.
The arrangement according to claim 3 wherein the wedge angle is 20.
degree.
-25.
degree.
.
5.
The arrangement according to claim 3 wherein the angle enclosed by the side wall and the lock wall is between 80.
degree.
to 90.
degree.
.
6.
The arrangement according to claim 1 wherein said inwardly directed projections are formed by undercuts in the inner walls of said receptors and the difference between the depth of the receptor and the height of the catch lugs is smaller than the length measured in the direction of the longitudinal axis of the undercuts