Candle assembly and fuel element therefor

• US 7,467,945 B2
• Filed: 05/06/2005
• Issued: 12/23/2008
• Est. Priority Date: 09/10/2004
• Status: Expired due to Fees

• Current Assignee: SC Johnson & Son Incorporated
• Original Assignee: SC Johnson & Son Incorporated
• Inventors: Nelson, Cory J., Furner, Paul E., Kubicek, Chris A., Szymczak, Thomas J., Schwarz, Ralph, Jameson, Elizabeth J., Tenhagen, Georgia A., Gray, Robert G.
• Primary Examiner(s): Rinehart; Kenneth B
• Assistant Examiner(s): Ndubizu; Chuka C
• Application Number:
  US11/123,372
• Publication Number:
  US 20060057521A1
• Time in Patent Office: 1,327 Days
• Field of Search: 431/289, 431/291, 431/295, 431/253, 431/322
• US Class Current: 431/291
• CPC Class Codes: F23D 3/16 using candles

Abstract

A candle assembly includes a melting plate having a capillary pedestal, a wick holder that fits over the capillary pedestal, a wick that is carried by the wick holder, and a fuel element that fits over the wick and wick holder and rests on the melting plate. The fuel element includes a duct therethrough for receiving the wick holder. The fuel element is adapted to prevent improper insertion of the wick holder into the duct. The duct is adapted to facilitate successful initial ignition and sustained burn of the wick by having a width that is selected to ensure that melted fuel material engages the wick when dripping down the duct. A capillary well disposed between the wick holder and the capillary pedestal may be adapted to promote a successful relight after an initial burn of the candle assembly. A candle holder, such as including the melting plate supported by a base, may be adapted to promote laminar air flow thereacross during a burn in a substantially calm atmospheric environment.

Claims

1. A fuel element adapted for use with a candle assembly having a wick retained by a wick holder including a wick retainer and an upwardly extending heat fin disposed on each of two opposite lateral sides of the wick retainer, the fuel element comprising:

a body of substantially solid fuel material defining an empty duct extending between an upper surface of the body and an empty cavity larger than the duct defined by a lower surface of the body, wherein the duct is adapted to receive the wick, the wick retainer, and the heat fins therethrough in an assembled condition;

wherein the duct comprises a slot having a first width in a width dimension, a first length in a length dimension at the upper surface greater than the width, and a second length at the cavity, and wherein the first length is less than a largest lateral dimension between opposite edges of the heat fins and the second length is larger than the largest lateral dimension between the opposite edges of the heat fins; and

wherein the first width ensures that melted fuel material from the body entering the duct will contact the wick in the assembled condition and wherein the length dimension continuously tapers from the upper surface to the cavity.

2. The fuel element of claim 1, wherein the first width is located at an opening through an upper surface of the body, and wherein the duct has a second width at an opening through a lower surface of the body larger than the first width.

3. The fuel element of claim 2, wherein the cavity is adapted to receive a base portion of the wick holder adjacent to the duct.

4. The fuel element of claim 3, wherein the duct and the cavity are adapted to receive the wick holder only partly therethrough such that the wick may extend between the cavity and the opening through the upper surface.

5. The fuel element of claim 1, wherein the first width is larger than a thickness of the heat fins.

6. The fuel element of claim 5, wherein the first length is coextensive with the first width.

7. The fuel element of claim 5, wherein the slot has tapered sidewalls that are closer together at the opening through the upper surface than at the opening through the lower surface.

8. The fuel element of claim 7, wherein the slot and cavity are adapted to receive the wick holder only through the opening through the lower surface.

9. The fuel element of claim 1, wherein the first width is not more than approximately 0.02 inches (0.5 mm) larger than a width of the wick.

10. The fuel element of claim 1, wherein the first width is adapted to form an interference fit between the duct and the wick.

11. The fuel element of claim 1, wherein the fuel material comprises candle wax.

12. The fuel element of claim 1, further comprising a volatile air treatment.

13. The fuel element of claim 12, wherein the volatile air treatment includes a fragrance.

14. A candle assembly comprising:

a fuel element having a slot extending between an upper surface of the fuel element and a cavity defined by a lower surface of the fuel element and made of fuel material that is substantially solid at room temperature; and

a wick carried by a wick holder including an upwardly extending wick receiver and an upwardly extending heat fin disposed on each of two opposite lateral sides of the wick receiver and disposed through the slot;

wherein the slot has a first width adapted to ensure that liquid passing through the slot engages the wick, a first length at the upper surface that is longer than the first width and shorter than a maximum lateral dimension of the heat fins, and a second length at the cavity that is longer than the maximum lateral dimension of the heat fin and wherein the slot continuously tapers from the second length to the first length.

15. The candle assembly of claim 14, wherein the fuel element comprises an amount of wax sufficient to fuel a sustained burn at the wick for between about 3 hours and about 3½

hours, and the liquid includes portions of the wax that may be melted by a flame on the wick.

16. The candle assembly of claim 14, wherein the first width is not more than approximately 0.02 inches (0.5 mm) larger than a diameter of the wick.

17. The candle assembly of claim 14, wherein the wick has an interference fit within the slot.

18. The candle assembly of claim 17, wherein the wick receiver comprises a wick sleeve encompassing the wick and extended from a base portion.

19. The candle assembly of claim 18, wherein the base portion is disposed in the cavity and the wick sleeve is disposed at least partly through the slot.

20. A fuel element adapted for use with a candle assembly having a wick retained by a holder, the fuel element comprising:

a body of substantially solid fuel material;

an empty cavity defined by a bottom surface of the body, wherein the cavity includes an upper cavity wall; and

a slot extending between the upper cavity wall and a top surface of the body;

wherein the slot has a width dimension and a length dimension larger than the width dimension, a first length at the upper cavity wall and a second length at the top surface of the body that is shorter than the first length, wherein the length dimension continuously tapers from the upper cavity wall to the top surface of the body.