Electric thermos jug

• US 7,091,455 B2
• Filed: 09/10/2004
• Issued: 08/15/2006
• Est. Priority Date: 06/25/2004
• Status: Expired due to Fees

• Current Assignee: Shiu P.O. Fung
• Original Assignee: Shiu P.O. Fung
• Inventors: Fung, Shiu Po
• Primary Examiner(s): Pelham, Joseph
• Application Number:
  US10/938,284
• Publication Number:
  US 20050284861A1
• Time in Patent Office: 704 Days
• Field of Search: None
• US Class Current: 219/432
• CPC Class Codes: A47J 27/2105 of the cordless type, i.e. whereby the water vessel can be plugged into an electrically-powered base element
• CPC Class Codes: A47J 27/21075 relating to the boiling sensor or to the channels conducting the steam thereto
• CPC Class Codes: A47J 27/21175 Covers
• CPC Class Codes: A47J 41/0016 the stopper remaining in the opening and clearing a passage way between stopper and vessel for dispensing
• CPC Class Codes: A47J 41/005 comprising heat or cold producing means, i.e. energy transfer from outside the vessel
• CPC Class Codes: A47J 41/0088 Inserts; Devices attached to the stopper

Abstract

An electric thermos jug comprises generally from the top to the bottom a lid assembly, a spout assembly, a double-layer vacuum body, a heating element, an underbody, and a base. An insulating plate and an insulating material layer are provided under the heating element inside the underbody of the jug. The lid is two-layer structure comprising an upper lid and lower lid with an air plenum in between. The electric thermos is convenient for use and effective in heat insulation due to the excellent air tightness of the components. The temperature inside the jug can be maintained for a long time without the need of repetitive heating. As a result, it can maintain a good water quality and is energy efficient. A safety valve is also employed.

Claims

1. An electric thermos jug comprising:

a base;

a jug body mountable on said base and having an underbody at a lower position, a double-layer vacuum body, a spout assembly at an upper portion, a heating element, and an insulating plate and an insulating material disposed under said heating element inside said underbody; and

a lid assembly removably mountable to an upper portion of said jug body comprising an upper lid and a lower lid defining an intermediate air plenum.

2. The electric thermos jug as described in claim 1 wherein said lower lid of said lid assembly is fitted with a relief valve and an air vent for pressure relief.

3. The electric thermos jug as described in claim 1 wherein a seal ring is fitted under a lower surface of said lower lid of said lid assembly at a corresponding position of said spout assembly.

4. The electric thermos jug as described in claim 1 wherein a steam valve and a steam pressure sensor that control on-off of power supply are fitted at a side location of said spout assembly.

5. The electric thermos jug as described in claim 1 wherein the jug body comprises a housing and an internal container which form a double-layer stainless steel vacuum body.

6. The electric thermos jug as described in claim 1 wherein a middle of a bottom of said double-layer body defines a heating area with a single-layer structure, and the heating element is located under this heating area and in close contact thereof.

7. The electric thermos jug as described in claim 1 wherein said heating element connects with a thermostat.

8. The electric thermos jug as described in claim 1 and further comprising a matchable cordless socket and a cordless plug fitted in a floor of the underbody and in the base, respectively.