Optical: systems and elements – Projection screen – Roll up screen
Reexamination Certificate
2007-04-10
2007-04-10
Perkey, W. B. (Department: 2851)
Optical: systems and elements
Projection screen
Roll up screen
C359S443000, C359S896000, C160S084060
Reexamination Certificate
active
10511449
ABSTRACT:
It is an object of the present invention to provide a self-standing manually operated elevating screen which makes it possible to raise and lower the screen over a long period of time without encountering any trouble such as damage, deformation or the like, and which makes it possible to simplify the construction used for this purpose. The upper-end supporting member4to which one end of the screen1is connected and the base member3D to which the other end of the screen1is connected are pivot-connected by left and right linking mechanisms5, 5. Urging means16, 16which are used to urge the lower side arms13, 13upward are provided, and slide members20, 20that are free to slide are fit over either the let and right upper side arms11, 11or the left and right lower side arms13, 13, or both. These left and right slide members20, 20are connected so that these members are free to rotate in relative terms on a vertical line S that is positioned in the approximate center of the screen1in the transverse direction of the screen.
REFERENCES:
patent: D323338 (1992-01-01), Court
patent: 5121977 (1992-06-01), Weisgerber
patent: 5468040 (1995-11-01), Peng Hsieh et al.
patent: 5706130 (1998-01-01), Rosen
patent: 6191886 (2001-02-01), Sinkoff
patent: 6249377 (2001-06-01), Takamoto et al.
patent: 6297905 (2001-10-01), Takamoto et al.
patent: 6873458 (2005-03-01), Bakkom et al.
patent: 60-59247 (1985-04-01), None
patent: 3-18529 (1991-02-01), None
patent: 05034826 (1993-02-01), None
patent: 05210168 (1993-08-01), None
patent: 06051403 (1994-02-01), None
Armstrong Kratz Quintos Hanson & Brooks, LLP
Cruz Magda
OS Co., Ltd.
Perkey W. B.
LandOfFree
Self-contained manual lifting screen does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Self-contained manual lifting screen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-contained manual lifting screen will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3728131