Electric lamp and discharge devices – With gas or vapor – Envelope with particular structure
Reexamination Certificate
2005-12-22
2009-06-09
Macchiarolo, Peter J (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
Envelope with particular structure
C313S574000, C313S493000
Reexamination Certificate
active
07545099
ABSTRACT:
A bulb for a discharge lamp, includes an inner burner chamber, the outer contour of the bulb and the burner chamber each having a central region and adjacent edge regions, each central region being toroidal, and each edge region of the burner chamber adapted to be in the form of a truncated cone away from the central region and rotationally symmetrically with respect to the bulb axis, at a specific angle of taper. The midpoints of the circle segments, which form the central region of the outer contour and of the burner chamber, have a distance in the direction of the bulb axis; and/or the angles of taper of the two edge regions of the burner chamber are not the same; and/or the bulb axis lies between the circle segment, which forms the central region of the outer contour and/or of the burner chamber, and its midpoint.
REFERENCES:
patent: 6094008 (2000-07-01), Omori et al.
patent: 6246170 (2001-06-01), Sugawara
patent: 7224107 (2007-05-01), Moench et al.
patent: 2003/0209986 (2003-11-01), Ishigami et al.
patent: 1 104 009 (2001-05-01), None
patent: 05 041197 (1993-02-01), None
Macchiarolo Peter J
Osram Gesellschaft mit beschraenkter Haftung
Raleigh Donald L
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