Ceiling mounted lift for a multi-purpose projector

Details Ceiling mounted lift for a multi-purpose projector Ceiling mounted lift for a multi-purpose projector

2011-06-21

2011-06-21

McKinnon, Terrell (Department: 3632)

Supports

Suspended supports

Adjustable

C248S669000, C352S242000, C352S243000

Reexamination Certificate

active

07963495

ABSTRACT:
A ceiling mounted lift for a multimedia projector that can be installed into a hollow ceiling. The same is equipped with a frame-shaped base plate (2) that can be fitted to an original ceiling, and with a platform (5) receiving the projector that can be lowered in relation to the base plate (2) from a non-usage position into a usage position. For lowering and lifting the platform (5) lifting spindles (3) that can be driven equally in both rotation directions and co-operatively connected with spindle nuts (4) are provided. The lifting spindles (3) as well as the spindle nuts (4) are equipped with a circular thread, whereby the spindle nuts (4) consist of Nylon thread nuts.

REFERENCES:
patent: 4577827 (1986-03-01), Eliscu
patent: 4750832 (1988-06-01), Lloyd et al.
patent: 4978984 (1990-12-01), Brookfield

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