US 4,904,120 AGranted

Frame for forming coverings on ground openings

AssigneeVon Roll AG

InventorsHansruedi Spiess, Francois Galvanetto

Life of this patent

Estimating the term…

Loading patent…

Abstract

A frame for forming coverings for ground openings and method of assembling such frame are disclosed. Frame parts for assembling the frame are provided at their ends with connecting lugs, which are arranged at different levels. On fitting the frame, the two frame parts are juxtaposed, their connecting lugs are arranged in spaced superimposed manner and are interconnected by screw couplings. For positively interconnecting the frame parts, the frame is turned upside down, and a liquid, pasty or granular filling material is filled into a bore on the underside of the upper connecting lug. The filling material also flows into the bore of the screw coupling, which is covered by a washer. Following the solidification of the filling material, the frame can either be transported in this state or in a disassembled state and can be then reassembled in the same way.

Claims15

Dependent claims

A frame for forming coverings for ground openings and formed for receiving one or more juxtaposed covers or gratings, the frame comprising a plurality of frame parts each including a frame wall and a frame base;

a plurality of screw couplings connecting said frame parts to each other for forming said frame, each of said frame parts including connecting lugs for receiving the screw couplings, said lugs being provided at ends of the frame parts and being formed each with at least one bore for receiving the screw coupling projecting over an end of the frame wall, a first connecting lug of said lugs provided at one end of the frame wall being positioned below a second connecting lug provided at another end of the frame wall in such a way that in the frame assembled of two adjacent frame parts the connecting lugs superimpose one another, are spaced from one another, extend parallel with each other and are connected to each other in spaced relationship by the screw coupling, one of said lugs having at a side thereof facing another of said lugs a cavity and another of said lugs having at least one web at a side thereof facing said one lug;
and a solidifiable filling material filling said cavity and surrounding said web and a bolt of said screw coupling received in said bore of each lug for positively fixing said lugs with said screw couplings when said material is solidified.

Dependencies are inferred from the claim text.