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US 8,044,634 B2Granted
Enhanced portable battery powered electrical appliance
AssigneeEveready Battery Company, Inc.
InventorPeter F. Hoffman
Life of this patent
Estimating the term…
Abstract
An appliance, such as a flashlight, accepts first and second batteries. The appliance also includes an electrical load, such as a light source. A first circuit, such as a DC to DC converter, receives power from the first battery and supplies power to the load. A second circuit, such as a DC to DC converter, receives power from the second battery and supplies electrical power to the load. In one embodiment, the appliance accepts batteries having multiple physical sizes.
Claims17
An appliance comprising:
- a load;
- a first battery to generate a first received power;
- a first power converter which generates a first power from the first received power;
- a first power isolation circuit that isolates the load from the first power converter on the first power being insufficient to independently power the load;
- a second battery to generate a second received power;
- a second power converter which generates a second power from the second received power;
- a second power isolation circuit that isolates the load from the second power converter on the second power being insufficient to independently power the load;
- and
- wherein the load receives at least one of the first power and the second power.
6 more elements
A flashlight comprising:
- a housing;
- a light source within the housing;
- a first power converter within the housing and which receives power from a first battery and provides a first power;
- a first isolation circuit within the housing and coupled to the light source and the first power converter wherein the first isolation circuit isolates the first power converter from the light source on the first power being insufficient to independently power the light source;
- a second power converter within the housing and which receives power from a second battery and provides a second power;
- a second isolation circuit within the housing and coupled to the light source and the second power converter wherein the second isolation circuit isolates the second power converter from the light source on the second power being insufficient to independently power the light source;
- and
- wherein the light source receives at least one of the first power and the second power.
5 more elements
Dependencies are inferred from the claim text.