Projector hanger frame

Details Projector hanger frame Projector hanger frame

2000-08-30

2002-11-26

Adams, Russell (Department: 2851)

Optics: motion pictures

With support

C348S151000, C352S242000

Reexamination Certificate

active

06485144

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a projector hanger frame. More particularly, the present invention relates to a hanger frame for various types of projectors.
Referring to
FIG. 1
, a first conventional projector hanger frame has a hanger tube
10
A, and a square plate
15
A disposed on a bottom of the hanger tube
10
A. The square plate
15
A has a plurality of through holes
16
A. A projector
20
A has a plurality of threaded holes
21
A and a plurality of heat radiation holes
22
A. The square plate
15
A is disposed on the projector
20
A. A plurality of bolts
25
A fasten the square plate
15
A and the projector
20
A together via the through holes
16
A and the threaded holes
21
A. Since the square plate
15
A covers the heat radiation holes
22
A, the radiation effeiciency of the projector
20
A is poor.
Referring to
FIG. 2
, a second conventional projector hanger frame has a hanger tube
10
B, and a rectangular plate
15
B disposed on a bottom of the hanger tube
10
B. The rectangular plate
15
B has a plurality of through holes
16
B. A projector
20
B has a plurality of threaded holes
21
B and a plurality of heat radiation holes
22
B. The rectangular plate
15
B is disposed on the projector
20
B. A plurality of bolts
25
B fasten the rectangular plate
15
B and the projector
20
B together via the through holes
16
B and the threaded holes
21
B. Since the rectangular plate
15
B covers the heat radiation holes
22
B, the radiation effeiciency of the projector
20
B is poor.
Referring to
FIG. 3
, a third conventional projector hanger frame has a hanger tube
10
C, and a rectangular plate
15
C disposed on a bottom of the hanger tube
16
C. The rectangular plate
15
C has a plurality of through holes
16
C. A projector
20
C has a plurality of threaded holes
21
C and a plurality of heat radiation holes
22
C. The rectangular plate
15
C is disposed on the projector
20
C. A plurality of bolts
25
C fasten the rectangular plate
15
C and the projector
20
C together via the through holes
16
C and the threaded holes
21
C. Since the rectangular plate
15
C covers the heat radiation holes
22
C, the radiation effeiciency of the projector
20
C is poor.
Referring to
FIG. 4
, a fourth conventional projector hanger frame has a hanger tube
10
D, and a rectangular plate
15
D disposed on a bottom of the hanger tube
10
D. The rectangular plate
15
D has a plurality of through holes
16
D. A projector
20
D has a plurality of threaded holes
21
D and a plurality of heat radiation holes
22
D. The rectangular plate
15
D is disposed on the projector
20
D. A plurality of bolts
25
D fasten the rectangular plate.
15
D and the projector
20
D together via the through holes
16
D and the threaded holes
21
D. Since the rectangular plate
15
D covers the heat radiation holes
22
D, the radiation effeiciency of the projector
20
D is poor.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a projector hanger frame. which is suitable for various types of projectors.
Another object of the present invention is to provide a projector hanger frame which is disposed on a projector to maintain a radiation effeiciency of the projector.
Another object of the present invention is to provide a projector hanger frame which is disposed on a projector to adjust an angle of a projector easily.
Accordingly, a projector hanger frame comprises a hollow square plate having a center hole, a collar disposed on the hollow square plate, a hanger tube passing through the hollow square plate and the collar, the hanger tube having a bottom flange and a positioning aperture, a connection seat engaging with the hollow square plate, a positioning seat engaging with the connection seat, a pair of first extensible plates disposed on a bottom of the positioning seat, and a pair of second extensible plates disposed on the bottom of the positioning seat.


REFERENCES:
patent: 4160999 (1979-07-01), Claggett
patent: 4750832 (1988-06-01), Lloyd, Sr. et al.
patent: 5541820 (1996-07-01), McLaughlin

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