Water heating vessel

• US 5,794,520 A
• Filed: 03/13/1997
• Issued: 08/18/1998
• Est. Priority Date: 03/20/1996
• Status: Expired due to Fees

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Hefford, David V.
• Primary Examiner(s): Simone, Timothy F.
• Application Number:
  US08/818,141
• Time in Patent Office: 523 Days
• Field of Search: 99/281, 99/293, 99/275, 99/323.1, 99/323.3, 99/325-333, 99/337, 99/338, 99/403, 99/468, 99/486, 99/487, 99/516, 99/536, 126/369, 126/20, 126/374, 219/401, 219/497, 219/501, 219/506, 219/512, 219/392, 219/441, 219/494, 337/336, 337/348, 337/371, 392/447, 392/498, 426/231, 426/510, 426/523
• US Class Current: 99/323.3
• CPC Class Codes: A47J 27/21075 relating to the boiling sensor or to the channels conducting the steam thereto
• CPC Class Codes: A47J 27/21116 specially adapted for detecting boiling of the water A47J27/21125 takes precedence

Abstract

An electric kettle has a body (10) a flat heating element (16), a thermal sensor (32) located with its bimetallic part 34 located in a steam chamber (20) and its electrical parts (36, 38) located in a dry chamber sealed from the steam chamber by a canopy (30), and first and second chimneys (40, 42) below the steam chamber (20) and the dry chamber respectively and having their lower ends connected to a base enclosure (44) below the heating element, the enclosure (44) having apertures (48) on the opposite side of the kettle to the chimneys.

Claims

1. A water heating vessel comprising a body portion (10), an electric heating element (16) and a steam vent (18) connecting the upper part of the body portion to a vented steam chamber (20), the vessel further comprising a dry chamber (28) adjacent the steam chamber (20) and separated from the steam chamber by moisture-proof divider means (30), a steam sensor being sealed into said divider means so that a thermally-sensitive part (34) of the steam sensor is in the steam chamber and an electrical portion (36, 38) of the steam sensor is in the dry chamber.

6. A water heating vessel as claimed in claim 1 wherein the steam sensor comprises a bi-metallic sensor, the thermally sensitive part comprising the bi-metallic element, and the electrical portion comprising a switch which is mechanically actuated by the bimetallic element.

2. A water heating vessel comprising a body portion (10) for receiving water to be heated, an electric heating element (16) and a steam vent (18) connecting the upper part of the body portion to a vented steam chamber (20), the heating element (16) defining the base of the body portion (10), the vessel further comprising a first chimney (40) connected to the lower end of the steam chamber (20), the lower end of the chimney being connected to a base enclosure (44) positioned below the heating element (16), the base enclosure (44) having at least one aperture (48) positioned on an opposite side of the vessel to the first chimney (40).

3. A water heating vessel according to claim 2, in which the steam chamber (20) and the first chimney (40) are located within a handle (14) of the vessel.

4. A water heating vessel according to claim 2, further comprising a dry chamber (28) adjacent the steam chamber (20) and separated from the steam chamber by moisture-proof divider means (30), a steam sensor being sealed into said divider means so that a thermally-sensitive part (34) of the steam sensor is in the steam chamber and an electrical portion (36, 38) of the steam sensor is in the dry chamber.

5. A water heating vessel according to claim 4 further comprising a second chimney (42) below the dry chamber (28) and connected at its lower end to the base enclosure (44).

7. A water heating vessel according to claim 3, further comprising a dry chamber (28) adjacent the steam chamber (20) and separated from the steam chamber by moisture-proof divider means (30), a steam sensor being sealed into said divider means so that a thermally-sensitive part (34) of the steam sensor is in the steam chamber and an electrical portion (36, 38) of the steam sensor is in the dry chamber.

8. A water heating vessel as claimed in claim 4, wherein the steam sensor comprises a bi-metallic sensor, the thermally sensitive part comprising the bi-metallic element, and the electrical portion comprising a switch which is mechanically actuated by the bimetallic element.

9. A water heating vessel as claimed in claim 5 wherein the steam sensor comprises a bi-metallic sensor, the thermally sensitive part comprising the bi-metallic element, and the electrical portion comprising a switch which is mechanically actuated by the bimetallic element.