Patent ID: 6588917
Filing Date: 2003-07-08
Classification: F21L,F21V

Abstract:
A flashlight comprising:(a) chamber means for retaining at least one dry cell battery; (b) a lamp; (c) switch means for selectively electrically coupling said lamp and said batteries; and (d) a head assembly which includes a lens and a conic reflector having: (i) a first central opening; (ii) a second central opening substantially opposite said first opening wherethrough said lamp is positioned, said second central opening having an area; (iii) a first length between said first central opening and said second central opening; and (iv) an inner area defined by the space between said first central opening and said second central opening; wherein said area of said second central opening is no less than about 0.7% and no greater than about 1.5% of said inner area; wherein the position of said lamp may be varied within said inner area of said reflector to focus and defocus light illuminated by said lamp.