Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
131 words
A flow-through heater for coffee percolators, consisting of a metal casting having a substantially flat bottom portion the border portions of which are formed with a receiving trough of U-shaped cross-section for receiving therein a substantially U-shaped electric heater element, and a boiling water chamber formed adjacent the foot of the U-shape of the heater element, water inflow and outflow conduits located adjacent the U-legs of said heater element opening into said boiling water chamber, said water inflow conduit being provided with heat insulation over the major portion of its length against the adjacent end of the heater element, characterized that said water inflow conduit is of a length amounting to at least 1.3 times the length of the average flow path of the water flowing through said boiling water chamber.
Claim 2
Dependent Claim
131 words
A flow-through heater for coffee percolators, consisting of a metal casting having a substantially flat bottom portion the border portions of which are formed with a receiving trough of U-shaped cross-section for receiving therein a substantially U-shaped electric heater element, and a boiling water chamber formed adjacent the foot of the U-shape of the heater element, water inflow and outflow conduits located adjacent the U-legs of said heater element opening into said boiling water chamber, said water inflow conduit being provided with heat insulation over the major portion of its length against the adjacent end of the heater element, characterized that said water inflow conduit is of a length amounting to at least 1.3 times the length of the average flow path of the water flowing through said boiling water chamber.
Claim 3
Dependent Claim
21 words
A flow-through heater according to claim 1, characterized in that it is of symmetric configuration with respect to its center line.
Claim 4
Dependent Claim
26 words
A flow-through heater according to claim 1 or 2, characterized in that the interior of said boiling water chamber is formed as a semi-annular flow channel.
Claim 5
Dependent Claim
23 words
A flow-through heater according to claim 1, characterized in that the edges formed by adjoining walls of said boiling water chamber are rounded.
Claim 6
Dependent Claim
21 words
A flow-through heater according to claim 1, characterized in that said boiling water chamber is provided with a substantially flat lid.
Claim 7
Dependent Claim
24 words
A flow-through heater according to claim 1, characterized in that it is formed with increasing bottom wall thickness towards the foot of said U-shape.
Claim 8
Dependent Claim
23 words
A flow-through heater according to claim 6, characterized in that the bottom wall thickness increases at an inclination angle between 1.5° and 4°.
Claim 9
Dependent Claim
13 words
A flow-through heater according to claim 7, wherein said inclination angle is 2°.
Claim 10
Dependent Claim
28 words
A flow-through heater according to claim 1, comprising an air gap for providing said heat insulation over the major portion of the length of said water inflow conduit.
Claim 11
Dependent Claim
24 words
A flow-through heater according to claim 1, wherein the length of said water inflow conduit is twice the diameter of said boiling water chamber.