US 4,782,637 A · Frame structure

Abstract

A frame structure for the construction of a box-shaped casing, in particular for air treatment devices. The frame structure comprises straight profile members (22), on the one hand, and corner elements (50,52) with three mutually perpendicular protrusions, each being connectable to one of said profile elements, on the other hand. Each corner element consists of two parts, namely an external part (50) including the external portions (50a, 50b,50c) of said protrusions and an internal part (52) including the internal portions (52a,52b,52c) of the protrusions. Said protrusion portions together form a closed cross-section fitting internally into the likewise closed cross-section of the profile members (b 22). The profile members can be slid onto the corner element protrusions while simultaneously securing the external and internal corner element parts (50,52).

Claims9

Dependent claims

A corner frame structure of a casing, consisting of:

a single corner element having three mutually perpendicular identical protrusions, each protrusion having a substantially closed, longitudinally constant cross section and consisting of an external and internal part of said corner element;
and three straight profile members, each profile member having a substantially closed longitudinally constant cross section snugly externally fitted onto the respective protrusion to thereby secure the external and internal parts to each other.

Dependencies are inferred from the claim text.

Frame structure

Life of this patent

Frame structure

Life of this patent

Abstract

Claims9