Fixing assembly for a flat roof structure and fixing device for use therein
OwnerSiegfried Schuleinventor
Life of this patent
Estimating the term…
Abstract
A fixing device for use in fixing insulating boards and waterproof sheeting, if required, to be fixed with the insulating boards on a sheet panel forming a cover plate for a flat roof, includes a sleeve inserted into a drilled hole extending through the waterproof sheeting, the insulating board, and the sheet panel, the lower end of the sleeve projecting beyond the sheet panel and including an expandable part which is opened out beyond the drilled hole diameter by tightening a nut on a bolt which passes through a plate or disc-like abutment element and the bore of the sleeve. The fixing device is made such that it can be detached again so that the roof covering can be repaired, renewed, and reconstructed, if required, without causing significant damage to the sheet panel.
Claims17
A fixing device for securing at least one insulating board onto a flat roof panel including a sheet metal plate, said fixing device comprising:
- a bolt having an enlarged head portion, an externally threaded end portion and a shaft portion extending therebetween;
- said end portion being provided with a profiled part for facilitating holding of said bolt;
- a sleeve means inserted on said shaft portion, said sleeve having a first end and a second end, and a length shorter than the length of said shaft portion;
- an annular deformable expansion member insertable onto said shaft portion between said first end of said sleeve and said enlarged head portion;
- said sleeve means and said expansion member in a non-deformed state having an outer diameter smaller than the diameter of said head portion;
- a plate-like abutment member inserted over said end portion to be supported on the upper surface of the uppermost insulating board said abutment member including a through hole having a diameter larger than the diameter of said end portion and smaller than the outer diameter of said sleeve;
- and
- a nut provided with an internal thread to be screwed on said externally threaded end portion,
- said bolt with sleeve and said expansion member provided thereon being inserted into a bore which extends through said insulating boards and said sheet metal plate, which is located underneath said boards such that said expansion member is positioned under said sheet metal plate, entirely outside said bore, said end portion extending through said hole in said abutment member and said second end of said sleeve contacting said abutment member;
- wherein screwing said nut member on said threaded end portion while simultaneously hindering any rotation of said bolt by holding said profiled part, causes a radial expansion of said expansion member to a deformed state in which said outer diameter of said expansion member is larger than the diameter of said bore, and wherein securing of said at least one insulating board to said sheet metal plate is effected by an axial interlocking between said sheet metal plate and said radially expanded deformed expansion member externally of said bore.
Dependencies are inferred from the claim text.