Intrinsically safe light

• US 7,682,036 B2
• Filed: 11/23/2005
• Issued: 03/23/2010
• Est. Priority Date: 04/11/2001
• Status: Active Grant

• Current Assignee: General Manufacturing Incorporated
• Original Assignee: General Manufacturing Incorporated
• Inventors: Reiff, David L., Reiff, Paul J., Brown, Clyde M.
• Primary Examiner(s): Ton; Anabel M
• Application Number:
  US11/286,818
• Publication Number:
  US 20060109662A1
• Time in Patent Office: 1,581 Days
• Field of Search: 362/184, 362/197, 362/228, 362/800, 315/307
• US Class Current: 362/184
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21L 14/023 having two or more, or different light sources
• CPC Class Codes: F21L 4/04 characterised by the provision of a light source housing portion adjustably fixed to the remainder of the device
• CPC Class Codes: F21L 4/08 characterised by means for in situ recharging of the batteries or cells
• CPC Class Codes: F21S 45/47 Passive cooling, e.g. using fins, thermal conductive elements or openings
• CPC Class Codes: F21S 6/00 Lighting devices intended to be free-standing F21S9/00, F21S10/00, F21S13/12 take precedence lighting devices specially adapted to be transported from place to place, e.g. lighting devices carried on wheeled supports F21L; details of supports for lighting devices F21V21/00
• CPC Class Codes: F21S 6/002 Table lamps, e.g. for ambient lighting
• CPC Class Codes: F21S 8/033 the surface being a wall or like vertical structure, e.g. building facade
• CPC Class Codes: F21S 8/035 by means of plugging into a wall outlet, e.g. night light
• CPC Class Codes: F21V 14/065 in portable lighting devices
• CPC Class Codes: F21V 15/02 Cages
• CPC Class Codes: F21V 15/04 Resilient mountings, e.g. shock absorbers shock absorbing devices of vehicle headlamp housings B60Q1/0491; in general F16F15/04
• CPC Class Codes: F21V 21/0965 for portable lighting devices
• CPC Class Codes: F21V 25/12 Flameproof or explosion-proof arrangements
• CPC Class Codes: F21V 29/713 in direct thermal and mechanical contact of each other to form a single system
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 31/04 Provision of filling media
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21W 2131/411 for inspection of the interior of hollow structures, e.g. vessels, tubes
• CPC Class Codes: F21Y 2113/00 : Combination of light sources
• CPC Class Codes: F21Y 2115/10 : Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 : Light emitting diode

Abstract

A work light for work or task areas which uses light-emitting diodes (LEDs) as the source of light. LED clusters are mounted on a circuit board which is located in a housing. The LED work lights may be powered by 3.6 volt, 4.8 volt, or 6.0 volt sources.

Claims

1. An intrinsically safe light, comprising:

a base;

a battery operably mounted in said base;

an LED mounting member connected to said base;

a plurality of high intensity, low power consumption LEDs mounted on said mounting member and electrically connected to said battery, each of said plurality of LED'"'"'s operable to emit light in an axial direction; and

further comprising an optical adjustment structure comprising;

a base portion axially movably engaged with said base; and

a lens fixedly attached to said base portion, whereby movement of said base portion relative to said base in said axial direction effects movement of said lens relative to said base and thereby effects movement of a focal point of said lens relative to said LEDs.

2. The intrinsically safe light according to claim 1, wherein said battery provides approximately 3.6 volts to said plurality of LEDs.

3. The intrinsically safe light according to claim 1, wherein said battery provides approximately 4.8 volts to said plurality of LEDs.

4. The intrinsically safe light according to claim 1, wherein said battery provides approximately 6.0 volts to said plurality of LEDs.

5. The intrinsically safe light according to claim 1, wherein said LEDs comprise focused LEDs.

6. The intrinsically safe light according to claim 1, wherein said mounting member comprises a heat sink.

7. The intrinsically safe light according to claim 1, wherein said mounting member comprises a heat sink including a plurality of fins.

8. The intrinsically safe light according to claim 1, wherein said battery is rechargeable, the light further comprising an energizing circuit for energizing said LEDs from said battery, said energizing circuit including a current limiting device.

9. The intrinsically safe light according to claim 8, further comprising a recharging circuit, said recharging circuit including a unidirectional electrical element for bypassing said current limiting device.

10. The intrinsically safe light according to claim 1, wherein said battery includes a plurality of battery contacts, and wherein said base includes a plurality of electrical contacts respectively contacting said battery contacts and connecting said battery to said energizing circuit.

11. The intrinsically safe light according to claim 10, further comprising a contact enclosure, one of said electrical contacts disposed in said enclosure, whereby said battery contact is connected to said electrical contact within said enclosure.

13. The intrinsically safe light according to claim 1, further comprising a hook for suspending the light.

14. The intrinsically safe light according to claim 1, further comprising a plurality of hooks for suspending the light in a plurality of suspending orientations.

12. An intrinsically safe light, comprising:

a base;

a battery operably mounted in said base;

an LED mounting member connected to said base;

a plurality of high intensity, low power consumption LEDs mounted on said mounting member and electrically connected to said battery, wherein said battery includes a plurality of battery contacts, and wherein said base includes a plurality of electrical contacts respectfully contacting said battery contacts and connecting said battery to said energizing circuit;

a plurality of contact enclosures, each said electrical contact respectively disposed in one of said enclosures, whereby said battery contacts are respectively connected to said electrical contacts within said plurality of enclosures.

19. The intrinsically safe light according to claim 12, wherein said plurality of enclosures comprises a plurality of tunnels.

20. The intrinsically safe light according to claim 12, wherein said LEDs comprise focused LEDs.

21. The intrinsically safe light according to claim 12, wherein said energizing circuit includes a current limiting device.

22. The intrinsically safe light according to claim 21, further comprising a recharging circuit, said recharging circuit including a unidirectional electrical element for bypassing said current limiting device.

15. An intrinsically safe light, comprising:

a base;

a battery operably mounted in said base;

an LED mounting member connected to said base;

a plurality of high intensity, low power consumption LEDs mounted on said mounting member and electrically connected to said battery; and

a head connected to and rotatable relative to said base.

17. The intrinsically safe light according to claim 15, wherein said transparent cover comprises a portion of said head, said head both rotatable and tiltable relative to said base.

16. An intrinsically safe light, comprising:

a base;

a battery operably mounted in said base;

an LED mounting member connected to said base;

a plurality of high intensity, low power consumption LEDs mounted on said mounting member and electrically connected to said battery; and

a head connected to and tiltable relative to said base.

18. An intrinsically safe light, comprising:

a base;

a battery operably mounted in said base;

an LED mounting member connected to said base;

a plurality of high intensity, low power consumption LEDs mounted on said mounting member and electrically connected to said battery; and

a plurality of separated intrinsically safe circuits to provide power from said battery to said plurality of high intensity, low power consumption LEDs.