Variable-focusing head cap assembly for a flashlight

Details Variable-focusing head cap assembly for a flashlight Variable-focusing head cap assembly for a flashlight

1998-11-12

2000-02-22

Husar, Stephen

Illumination

Self powered lamp

Dome, globe or wire guard or lamp bulb cover

362187, 362293, F21L 700

Patent

active

060272260

ABSTRACT:
A variable-focusing head cap assembly is used in a flashlight having a barrel and a lamp mounted on one end of the barrel. The variable-focusing head cap assembly includes a tubular coupling sleeve, a parabolic reflector, a cap member, and a generally C-shaped resilient friction ring. The C-shaped resilient friction ring is received in an annular receiving groove that is formed in one of the inner peripheral surface of a cap body of the cap member and the outer peripheral surface of the coupling sleeve, and is in friction contact with the other one of the inner peripheral surface of a cap body of the cap member and the outer peripheral surface of the coupling sleeve so as to retain the cap body at a desired axial position along the coupling sleeve and obtain a desired focusing effect.

REFERENCES:
patent: 4821156 (1989-04-01), Siefert et al.
patent: 5014171 (1991-05-01), Price, III
patent: 5816688 (1998-10-01), Shui-Shang

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