Connecting arrangement for a heating boiler
OwnerHans Viessmanninventor
Life of this patent
Estimating the term…
Abstract
Connecting arrangement for a heating boiler, in whose water-bearing sheet-steel housing is arranged an installation casting consisting of a combustion chamber and fuel-gas ducts. For having a good and simple connection between the sheet-steel housing and the installation casting the improvement consists in that the front and rear wall of the sheet-steel housing are provided with an access opening and the opening edges are bent in the form of a collar, the inside diameter of the collar being rather smaller than the outside diameter of the seating faces of the installation casting and the front and rear wall being connected to the seating faces by a press fit.
Claims13
A connecting arrangement for a heating boiler of the type having a sheet-metal housing adapted for containing water and having at least front and rear sheet metal walls opposed to each other, comprising:
- a first opening in said front wall;
- a first sheet metal collar integral with said front wall surrounding said first opening;
- a second opening in said rear wall, aligned with said first opening;
- a second sheet metal collar integral with said rear wall surrounding said second opening;
- an installation casting adapted for a combustion chamber and fuel gas ducts;
- first and second spaced apart seating faces on said installation casting;
- said first seating face being a first press fit in said first sheet metal collar;
- said second seating face being a second press fit in said second sheet metal collar;
- and
- first and second ends of said installation casting extending outward a substantial distance beyond said front and rear sheet metal walls respectively.
In a connecting arrangement for a heating boiler of the type having a water-bearing sheet-steel housing having first and second walls and a casting passing through first and second aligned openings in said first and second walls of said housing wherein the improvement comprises:
- (a) first and second flanges bent in the form of first and second collars in said sheet-steel housing surrounding and defining said first and second aligned openings;
- (b) first and second seating faces on said casting, said first seating face fitting said first collar in a press fit, said second seating face fitting said second collar in a press fit;
- (c) a first stop collar on said casting adjacent said first seating face adapted for abutting said first wall;
- (d) a second stop collar on said casting adjacent said second seating face adapted for abutting said second wall;
- and
- (e) said second stop collar having a maximum dimension smaller than said first opening whereby said second stop collar passes through said first opening and engages the inside of said second wall while said first stop collar engages the outside of said first wall.
Connecting arrangement for a heating boiler, in whose water-bearing sheet-steel housing is arranged an installation casting consisting of a combustion chamber and fuel-gas ducts, whereby the front and rear wall of the sheet-steel housing are provided with an access opening and the opening edges are bent in the form of a collar, the inside diameter of the collar being rather smaller than the outside diameter of the seating faces of the installation casting, the front and rear wall being connected to the seating faces by a press fit, and said seating faces are provided on the end sides of the installation casting with, on the one hand, stop collars and, on the other hand, annular grooves, the opening edges of the front and rear wall engaging into the annular grooves.
Dependencies are inferred from the claim text.