Portable screen device

Details Portable screen device Portable screen device

2008-09-16

2008-09-16

Mahoney, Christopher (Department: 2862)

Optical: systems and elements

Projection screen

Roll up screen

Reexamination Certificate

active

11585191

ABSTRACT:
A portable screen device including a casing, an extendable screen, and an extendable screen supporting column which has one end pivotally supported at a center portion of a back surface of the casing. The column can be pivoted to an extended position for holding the screen in an extended state. The column includes a plurality tubular members which slide with respect to each other. A lowermost tubular member has a first column lock mechanism for engaging the lowermost tubular member with an adjacent, upper tubular member to maintain the column at a desired height. A column lock releasing mechanism including a pedal is provided for releasing the engagement between the lowermost tubular member and the upper tubular member.

REFERENCES:
patent: 5581401 (1996-12-01), Takamoto et al.
patent: 5706130 (1998-01-01), Rosen
patent: 5798861 (1998-08-01), Doat
patent: 6046845 (2000-04-01), Niwa et al.
patent: 2007/0002440 (2007-01-01), Miyagawa et al.
patent: 05-94837 (1993-12-01), None
patent: 6-36048 (1994-05-01), None

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