Flashlight

• US 7,503,671 B2
• Filed: 06/22/2007
• Issued: 03/17/2009
• Est. Priority Date: 07/13/2006
• Status: Expired due to Fees

• Current Assignee: Pelican Products Incorporated (Pelican Products Holdings, Inc.)
• Original Assignee: Pelican Products Incorporated (Pelican Products Holdings, Inc.)
• Inventors: Ali, Shahid, Lee, Kiem T., Kang, Sukwon Greg
• Primary Examiner(s): O'Shea; Sandra L
• Assistant Examiner(s): HAN, JASON
• Application Number:
  US11/767,431
• Publication Number:
  US 20080013308A1
• Time in Patent Office: 634 Days
• Field of Search: 362205-206, 362/295
• US Class Current: 362/205
• CPC Class Codes: F21L 4/00 Electric lighting devices with self-contained electric batteries or cells
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21L 4/085 Pocket lamps
• CPC Class Codes: F21V 23/0421 the switch being part of, or disposed on the tail cap portion thereof
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A flashlight includes a battery and a circuit for operation to signal to a user that the battery voltage is at selected voltage or power level. There can be two switches each being for operating a light emitting source of the flashlight. The switches are linked 3-way switches and have momentary-on functionality. An enlarged head is located above the barrel and there is the intermediate portion between the head and the barrel. The intermediate portion receives part of the first switch. The second switch is located in part of the tail cap of the flashlight.

Claims

1. A flashlight comprising:

an elongated axial member for housing a power source, the member having a front end and a tail end at an opposite end of the member, and a side wall between the front end and the tail end;

the member further housing a light emitting source for emitting light along the axial direction of the elongated member and a three-way switching system connecting the power source to the light emitting source;

the three-way switching system having a first switch located on the side wall, wherein the first switch is closer towards the front end of the member than the tail end, and a second switch located on the tail end, wherein the three-way switching system allows the flashlight to be turned on using the first switch and turned off using the second switch and vice versa and wherein each of the switches also operates in the three-way switching system independently of the other switch so as to be able to independently switch the light emitting source on or off;

the first switch being a side switch and the second switch being a tail switch;

the first switch and the second switch both including an electrical connection with the three-way switching system, the first switch and the second switch acting to open and close the three-way switching system between the battery and the light emitting source;

the side wall having an inner surface and an outer surface;

the three-way switching system connecting the battery to an electrical contact on the light emitting source; and

wherein both of the first switch and the second switch include a momentary on function, the momentary on function is for closing the three-way switching system when manual pressure used to operate either of the switches reaches a predetermined threshold and for opening the electrical circuit when manual pressure is reduced below the predetermined threshold.

2. A flashlight as claimed in claim 1, wherein the light emitting source is an LED.

3. A flashlight as claimed in claim 1, wherein the power source is a rechargeable battery, wherein the rechargeable battery includes a battery pack that is part of the circuit between the first switch and the second switch.

4. A flashlight as claimed in claim 1, elongated member, the front end and the tail end are essentially cylindrical members.

5. A flashlight comprising:

an axial body member for housing a power source, the body member having a leading end and a base end at an opposite end of the body, and a side wall between the leading end and the base end;

a head for engaging the leading end;

a light emitting source at the leading end;

a tail for engaging the base end and having a tail end;

wherein the body member, the head and the tail are axially aligned and define a single axial direction;

a three-way switching system connecting the power source to the light emitting source, the three-way switching system having a first switch located on the side wall, wherein the first switch is closer towards the leading end of the body member than the base end, and a second switch located on the tail end, wherein the three-way switching system allows the flashlight to be turned on using the first switch and turned off using the second switch and vice versa, and wherein both of the first switch and the second switch includes a momentary on function, wherein the momentary on function is for closing the three-way switching system when manual pressure used to operate either of the switches reaches a predetermined threshold and for opening the electrical circuit when manual pressure is reduced below the predetermined threshold; and

the first switch and the second switch both including an electrical connection with the three-way switching system, the first switch and the second switch acting to open and close the three-way switching system between the battery and the light emitting source.

6. A flashlight as claimed in claim 5, wherein the tail end includes a single switch, the single switch being directed for operation to switch on and off by pressure in an axial direction of the flashlight.

7. A flashlight as claimed in claim 5, wherein the light emitting source is an LED.

8. A flashlight as claimed in claim 5, wherein the power source is a rechargeable battery, wherein the rechargeable battery includes a battery pack that is part of the circuit between the first switch and the second switch.

9. A flashlight as claimed in claim 8, wherein the battery pack comprises a casing and a plurality of electrical terminals.

10. A flashlight as claimed in claim 5, wherein the body member, the head and the tail are essentially cylindrical members.

11. A flashlight as claimed in claim 5, wherein the body member is threadably engagable with the head and the tail.

12. A flashlight comprising:

an elongated axial member for housing a power source, the member having a front end and a tail end at an opposite end of the member, and a side wall between the front end and the tail end and wherein the member comprises a head and a tail cap;

wherein the elongated member, the head and the tail cap are axially aligned and define a single axial direction;

the member further housing a light emitting source for emitting light along the axial direction of the elongated member and a three-way switching system connecting the power source to the light emitting source;

the three-way switching system having a first switch located on the side wall and a second switch located on the tail cap, wherein the three-way switching system allows the flashlight to be turned on using the first switch and turned off using the second switch and vice versa, and wherein each of the switches also operates in the three-way switching system independently of the other switch so as to be able to independently switch the light emitting source on or off;

the first switch and the second switch both including an electrical connection with the three-way switching system, the first switch and the second switch acting to open and close the three-way switching system between the battery and the light emitting source; and

the three-way switching system connecting the battery to the light emitting source, wherein both the first switch and the second switch have a momentary on function, the momentary on function being for closing the three-way switching system when manual pressure used to operate either of the switches reaches a predetermined threshold and for opening the electrical circuit when manual pressure is reduced below the predetermined threshold.

13. A flashlight as claimed in claim 12, wherein the power source is a rechargeable battery, wherein the rechargeable battery includes a battery pack that is part of the circuit between the first switch and the second switch, wherein the battery pack comprises a casing and a plurality of electrical terminals.

14. A flashlight as claimed in claim 12, wherein the tail cap excludes a battery housing.

15. A flashlight as claimed in claim 12, wherein the flashlight defines an axial direction from the head to the body to the tail and wherein the tail cap includes a single switch, the single switch being directed for operation to switch on and off by pressure in an axial direction of the flashlight.

16. A flashlight as claimed in claim 12, wherein the elongated member, the head and the tail are essentially cylindrical members.

17. A flashlight as claimed in claim 12, wherein the elongated member is threadably engagable with the head and the tail cap.

18. A flashlight comprising:

an elongate axial member for housing a power source, the member having a front end and a tail end at an opposite end of the member, and a side wall between the front end and the tail end;

wherein the elongated member, the front end and the tail end are axially aligned and define a single axial direction;

a light emitting source arranged within the elongate member to be visible through the front end along the axial direction of the elongated member;

an electrical circuit for connecting the power source to the light emitting source, the circuit having a first switch located on the side wall of the elongate member and a second switch located on the tail end of the member, wherein the circuit allows the light emitting source to be turned on using the first switch and to be turned off using the second switch and vice versa, and wherein each of the switches also operates in the circuit independently of the other switch so as to be able to independently switch the light emitting source on or off; and

wherein both the first switch and the second switch includes a momentary on function, the momentary on function being for closing the electrical circuit when pressure used to operate either of the switches reaches a first predetermined threshold and for opening the electrical circuit when manual pressure is reduced below the predetermined threshold.

19. A flashlight according to claim 18, wherein both of the first switch and the second switch are biased toward an off state, such that the bias must be overcome by application of pressure greater than a second predetermined threshold to change the at least one switch from the off state to an on state, the second pressure being greater than the first predetermined threshold pressure.

20. A flashlight according to claim 18, having at least two modes of operation:

a first mode being an on mode initiated by pressure action to at least one of the first switch and the second switch and subsequent release of pressure to at least one of the first switch and the second switch; and

a second mode being an on mode initiated by holding pressure to at least one of the first switch and the second switch, wherein the second on mode is different from the first on mode.

21. A flashlight according to claim 20, wherein the first switch is located closer to the front end than to the tail end of the elongate member.

22. A flashlight according to claim 18, wherein the first switch is located closer to the front end than to the tail end of the elongate member.

23. A flashlight according to claim 18, further comprising a rechargeable battery.

24. A flashlight as claimed in claim 18, wherein the elongated member, the head and the tail are essentially cylindrical members.

25. A flashlight as claimed in claim 18, wherein the elongated member is threadably engagable with the front end and the tail.

26. A method of operating a flashlight comprising:

an axial body member for housing a power source, the body member having a leading end and a base end at an opposite end of the body, and a side wall between the leading end and the base end;

a head for engaging the leading end;

a tail for engaging the base end;

wherein the body member, the head and the tail are axially aligned and define a single axial direction;

a light emitting source at the leading end for emitting light along the axial direction of the body member, an electrical circuit for connecting the power source to the light emitting source, a circuit having a first switch and a second switch;

including;

in a first step closing the first switch of a three-way switching system connecting the power source to the light emitting source to cause the flashlight to be turned on;

in a second step opening a normally closed second switch of the three-way switching system, wherein the three-way switching system allows the flashlight to be turned off;

in a third step closing the first switch of the three-way switching system connecting the power source to the light emitting source to cause the flashlight to be turned on;

in a fourth step opening the first switch of three-way switching system, wherein the three-way switching system allows the flashlight to be turned off;

in a fifth step providing both the first and the second switch with a momentary on feature, and applying a predetermined manual pressure to at least one of the first or second switches of the three-way switching system thereby to connect the power source to the light emitting source to cause the flashlight to be turned on only when and while a manual pressure is applied to operate either one of the respective switches, the manual pressure reaching a predetermined threshold; and

in a sixth step releasing the pressure on the closed first or second switch as closed in the fifth step thereby to turn the flashlight off.

27. A method as claimed in claim 26 including having both switches enabled to operate in a momentary on mode, and applying manual pressure to operate either or both of the respective switches of the flashlight in a momentary on mode by applying the manual pressure to reaching a predetermined threshold.

28. A method as claimed in claim 26 including activating the momentary on function when manual pressure used to operate the respective switches reaches a predetermined threshold and for deactivating the momentary on function when manual pressure is reduced below the predetermined threshold.

29. A method of operating a flashlight comprising:

an axial body member for housing a power source, the body member having a leading end and a base end at an opposite end of the body, and a side wall between the leading end and the base end;

a head for engaging the leading end;

a tail for engaging the base end;

wherein the body member, the head and the tail are axially aligned and define a single axial direction;

a light emitting source at the leading end for emitting light along the axial direction of the body member, an electrical circuit for connecting the power source to the light emitting source, the circuit having a first switch and a second switch;

turning on the light emitting source of the flashlight through the circuit by using the first switch;

turning off the light emitting source using the second switch and vice versa; and

operating each of the switches independently of the other switch so as to be able to independently switch the light emitting source on or off;

applying a first pressure to either the first switch and the second switch up to a first predetermined threshold to close the circuit and turn on as a momentary on function the light emitting source and for opening the electrical circuit when manual pressure is reduced below the predetermined threshold; and

operating at least one of the first switch and the second switch in the momentary on function.

30. A method as claimed in claim 29, including overcoming with pressure a biasing of both of the first switch and the second switch towards an off state, such that the bias must be overcome by application of pressure greater than a second predetermined threshold to change the at least one switch from the off state to an on state, the second pressure being greater than the first predetermined threshold pressure.

31. A method as claimed in claim 29 including overcoming with pressure a biasing of both of the first switch and the second switch towards an off state, such that the bias must be overcome by application of pressure greater than a second predetermined threshold to change the at least one switch from the off state to an on state, the second pressure being greater than the first predetermined threshold pressure;

and including operating the flashlight in the momentary on mode in both switches.

32. A flashlight as claimed in claim 29, wherein the body member, the head and the tail are essentially cylindrical members.

33. A flashlight comprising:

an elongate axial member for housing a power source, the member having a front end and a tail end at an opposite end of the member, and a side wall between the front end and the tail end;

wherein the elongated member, the front end and the tail end are axially aligned and define a single axial direction;

a light emitting source arranged within the elongate member to be visible from the front end along the axial direction of the elongated member;

an electrical circuit for connecting the power source to the light emitting source, the circuit having a first switch located on the side wall of the elongate member and a second switch located on the tail end of the member, wherein the circuit allows the light emitting source to be turned on using the first switch and to be turned off using the second switch and vice versa, and wherein each of the switches also operates in the circuit independently of the other switch so as to be able to independently switch the light emitting source on or off;

wherein both of the first switch and the second switch includes a momentary on function, the momentary on function being for closing the electrical circuit when pressure used to operate the switch reaches a first predetermined threshold and for opening the electrical circuit when manual pressure is reduced below the predetermined threshold; and

wherein both of the first switch and the second switch are biased toward an off state, such that the bias must be overcome by application of pressure greater than a second predetermined threshold to change the at least one switch from the off state to an on state, the second pressure being greater than the first predetermined threshold pressure.

34. A flashlight as claimed in claim 33, wherein the elongated member, the head and the tail are essentially cylindrical members.

35. A flashlight as claimed in claim 33, wherein the elongated member is threadably engagable with the front end and the tail end.