Vessel for food preparation
AssigneeOy Wartsila Ab
InventorsTiina Aakenus, Pekka Mertanen, Reijo Peltonen
Life of this patent
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Abstract
A vessel for food preparation having a bottom made of two different members, one of which is the actual bottom of the vessel and the other a separate bottom plate which is attached to the bottom of the vessel by means of several spaced-apart spot-formed or generally small-area attachment points. When the vessel is heated there will initially be a considerable temperature difference between the two layers of the bottom construction, which will give rise to small buckles in the separate bottom plate between its attachment points. Inside these buckles the air slot between the two layers of the bottom construction grows and this slows down the heat transmission to the inner surface of the vessel.
Claims12
A vessel for food preparation having a side wall structure and a bottom, said bottom comprising:
- two plate members;
- a first of said two plate members forming an inner portion integral with said side wall structure and having an outer portion with a uniform surface;
- a second of said two plate members which is a separate member and has a surface facing the outer portion ofsaid first plate member and being uniform therewith, said second plate member being rigidly attached to an in contact with the uniform surface of said first plate member;
- several spaced-apart small-area attachment points for rigidly attaching said first plate member to said second plate member, said spaced-apart small-area attachment points having therebetween, at least in one direction along the mutual contact surfaces of said two plate members, an area of considerable length being free of attachment points between said two plate members;
- and
- the thickness of said second plate member and the distance between said attachment points being related so as to allow buckling of said second plate member due to thermal expansion thereof, thereby introducing an air gap between said two plate members.
Dependencies are inferred from the claim text.