Rechargeable fluorescent task lamp

• US 7,434,953 B2
• Filed: 04/30/2004
• Issued: 10/14/2008
• Est. Priority Date: 05/02/2003
• Status: Expired due to Fees

• Current Assignee: Bayco Products Incorporated
• Original Assignee: Bayco Products Ltd
• Inventors: Bayat, Bijan, Newton, James
• Primary Examiner(s): Ward; John A
• Application Number:
  US10/837,437
• Publication Number:
  US 20040218384A1
• Time in Patent Office: 1,628 Days
• Field of Search: 362/158, 362/183, 362/223, 362/275, 362/285, 362/396, 362/220, 362/221
• US Class Current: 362/183
• CPC Class Codes: F21L 14/026 having a linear light source
• CPC Class Codes: F21L 4/08 characterised by means for in situ recharging of the batteries or cells
• CPC Class Codes: F21V 21/406 for portable lighting devices
• CPC Class Codes: F21Y 2103/00 Elongate light sources, e.g. fluorescent tubes
• CPC Class Codes: H02J 2207/40 adapted for charging from various sources, e.g. AC, DC or multivoltage
• CPC Class Codes: H02J 5/00 Circuit arrangements for transfer of electric power between ac networks and dc networks H02J3/36 takes precedence
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H02J 7/02 for charging batteries from ac mains by converters

Abstract

A battery operated fluorescent lamp is disclosed, which is operable from the battery while the battery is being recharged, comprising a tubular housing configured as a handle grip at one end and a cylindrical lens portion at the other end. The tubular housing lockably connects to a battery pack. The cylindrical 3030 lens portion encloses a miniature fluorescent bulb. The electrical circuitry, enclosed within the handle grip and alternately operable from either 120 VAC or 12 VDC, includes a converter circuit, a battery charging circuit, and a fluorescent lamp ballast circuit. The battery pack is electrically coupled to simultaneously receive charging current from an output of the charging circuit and to deliver DC supply voltage to the fluorescent lamp ballast circuit without the occurrence of a net discharge of the battery pack.

Claims

1. A battery operated portable fluorescent lamp, comprising:

an elongated tubular housing having a first end, a midpoint and a second end, and further configured as a handle grip between the first end and the midpoint and configured as a substantially cylindrical lens between the midpoint and the second end, wherein the first end is adapted to couple to a battery pack and the lens is adapted to enclose a miniature fluorescent bulb;

an electrical circuitry, enclosed within the handle grip and alternately operable from either a 120 VAC voltage source or a 12 VDC voltage source, the electrical circuitry including a feed forward converter circuit operating at approximately 50 KHz to convert 120 VAC to a DC supply voltage, a separate switching regulator battery charging circuit, and a push-pull converter fluorescent lamp ballast circuit having an output coupled to the fluorescent bulb enclosed within the lens; and

a battery pack, coupled to the first end of the tubular housing and operable to simultaneously receive charging current from an output of the charging circuit and to deliver DC supply voltage to the fluorescent lamp ballast circuit without the occurrence of a net discharge of the battery pack.

2. The apparatus of claim 1, wherein the tubular housing comprises:

a handle grip having a hollow interior for enclosing the electrical circuitry and an external surface configured for a secure and comfortable grip by a person'"'"'s hand; and

a substantially cylindrical lens formed of a light-transmissive material for enclosing the miniature fluorescent lamp bulb while permitting substantially all of the light emitted by the fluorescent bulb to be radiated therethrough.

3. The apparatus of claim 2, wherein the handle grip is formed of molded plastic and includes first connection means having first and second terminals for connecting the electrical circuitry to the battery pack or to an external battery charger and second connection means having first and second terminals for connecting the electrical circuitry to the miniature fluorescent lamp bulb.

4. The apparatus of claim 2, wherein the handle grip includes a third connection means for connecting the electrical circuitry to the 120 VAC voltage source and a fourth connection means for connecting the electrical circuitry to the 12 VDC voltage source.

5. The apparatus of claim 4, wherein the third connection means connects the converter input to the 120 VAC voltage source.

6. The apparatus of claim 4, wherein the fourth connection means connects the battery charger input to the 12 VDC voltage source.

7. The apparatus of claim 4, wherein the handle grip further includes first switch means for turning on and off the electrical circuitry to operate the fluorescent lamp.

8. The apparatus of claim 2, wherein a longitudinal axis of the lens is offset at an angle of approximately nine degrees relative to a longitudinal axis of the handle grip.

9. The apparatus of claim 2, wherein light is radiated through the lens into substantially all radial directions relative to the longitudinal axis of the lens.

10. The apparatus of claim 2, wherein light is radiated into less than substantially all radial directions relative to the longitudinal axis of the lens.

11. The apparatus of claim 2, wherein the lens includes a spine member extending from the handle grip along an inside surface of the lens defined as a rearward surface and along substantially the full length of the lens.

12. The apparatus of claim 11, wherein the spine member provides structural strength to resist breakage if the lamp is dropped.

13. The apparatus of claim 11, wherein the spine member is hollow, for enclosing at least a portion of the electrical circuitry.

14. The apparatus of claim 11, wherein the spine member is hollow, for enclosing a flash circuit for operating a flashing light disposed at the second end of the tubular housing.

15. The apparatus of claim 1, operable for use with an external battery charger when the apparatus of claim 1 is not coupled to a battery pack, comprising:

an enclosure formed as a base for the tubular housing and containing a battery charger coupled to at least a positive terminal and a negative terminal of the battery charger; and

a pair of opposing mandible clamps formed integral with the enclosure and on opposite sides of the enclosure for lockably engaging corresponding openings disposed on the first end of the tubular housing, such that the positive terminal and the negative terminal of the battery charger are placed in contact with corresponding positive and negative terminals of the electrical circuitry in the tubular housing when the enclosure is secured to the first end of the tubular housing with the pair of opposing mandible clamps.

16. The apparatus of claim 1, wherein the miniature fluorescent bulb is rated at least 13 watts.

17. The apparatus of claim 4, wherein the handle grip further includes second switch means for switching between the 120 VAC and 12 VDC voltage sources.

18. The apparatus of claim 2, wherein the light-transmissive material of the cylindrical lens is transparent.

19. The apparatus of claim 2, wherein the light-transmissive material of the cylindrical lens is colored according to one of a plurality of colors.

20. The apparatus of claim 2, wherein the cylindrical lens is interchangeable with other cylindrical lenses having distinct predetermined characteristics.

21. The apparatus of claim 2, wherein the cylindrical lens includes therewithin a reflector disposed between the fluorescent bulb and a proximate interior surface of the cylindrical lens for directing light emitted by the fluorescent bulb in a predetermined pattern.

22. The apparatus of claim 21, wherein the reflector includes one of a plurality of interchangeable reflectors configured according to different shapes and reflectivities.

23. The apparatus of claim 11, wherein the cylindrical lens includes therewithin a reflector disposed between the fluorescent bulb and a proximate surface of the tubular spine within the cylindrical lens for directing light emitted by the fluorescent bulb in a predetermined pattern.

24. The apparatus of claim 23, wherein the reflector includes one of a plurality of interchangeable reflectors configured according to different predetermined shapes and reflectivities.

25. The apparatus of claim 2, wherein the cylindrical lens includes therewithin a reflector disposed outside the cylindrical lens and proximate an exterior surface of the cylindrical lens for directing light emitted by the fluorescent bulb in a predetermined pattern.

26. The apparatus of claim 3, wherein the handle grip includes a textured surface for enabling a non-slip grip by a person holding the portable fluorescent lamp.

27. The apparatus of claim 3, wherein the handle grip includes a contoured surface for enabling a secure grip by a person holding the portable fluorescent lamp.

28. The apparatus of claim 1, wherein the elongated tubular housing and the battery pack of the portable fluorescent lamp are water tight for preventing the ingress of moisture or other fluids into the tubular housing.

29. The apparatus of claim 1, wherein the elongated tubular housing and the battery pack of the portable fluorescent lamp are water tight for preventing the ingress of moisture or other fluids into the tubular housing, such that the portable fluorescent lamp may be submersed in liquids during battery operation without leakage of the liquid into the electrical circuitry.

30. The apparatus of claim 1, wherein the portable fluorescent lamp includes buoyant means for enabling the portable fluorescent lamp to float.

31. The apparatus of claim 1 wherein the handle grip includes means to enable supporting the portable fluorescent lamp from a lanyard or a hook.

32. The apparatus of claim 1, wherein the tubular housing comprises:

a handle grip having a hollow interior for enclosing the electrical circuitry and an external surface configured for a secure and comfortable grip by a person'"'"'s hand; and

a substantially tubular lens formed of a light-transmissive material for enclosing the miniature fluorescent lamp bulb while permitting substantially all of the light emitted by the fluorescent bulb to be radiated therethrough, wherein the tubular lens has a cross-section shape selected from the group consisting of square, rectangular, pentagonal and hexagonal.