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US 5,207,502 AGranted
Miniature flashlight
AssigneeMag Instrument, Inc.
InventorAnthony Maglica
Life of this patent
Estimating the term…
Abstract
A miniature flashlight as disclosed to comprise a barrel, a tail cap, a head assembly, and means for holding a miniature lamp bulb and for providing interruptible electrical coupling to dry cell batteries retained within the barrel. One-way valves may be positioned at seal locations in association with passageways to allow venting of overpressure within the interior volume of the flashlight.
Claims2
A flashlight comprising
- a battery housing forming a closed internal volume having a passage extending to atmosphere from said closed internal volume;
- a lamp bulb;
- an electrical circuit extending form said battery housing to said lamp bulb;
- a one-way valve in said passage oriented to permit gas flow from said closed internal volume to atmosphere.
1 more element
A flashlight comprising:
- a battery housing having a first opening;
- a lamp bulb;
- an electrical circuit extending from said battery housing to said lamp bulb;
- a closure for said opening of said battery housing, said closure being a tailcap mounted by threads to said battery housing, said battery housing and said tailcap forming a closed internal volume having a passage extending to atmosphere from said closed internal volume between said housing and said tailcap;
- a one-way valve in said passage oriented to permit gas flow from said closed internal volume to atmosphere, said one-way valve being a seal ring having a flexible flange extending to seal against a side of said passage and inclined away form said internal volume in said passage.
2 more elements
Dependencies are inferred from the claim text.