Brakes – Internal-resistance motion retarder – Using a rotary-type fluid damper
Patent
1993-10-08
1995-05-16
Oberleitner, Robert J.
Brakes
Internal-resistance motion retarder
Using a rotary-type fluid damper
74527, 74569, F16D 5702
Patent
active
054152542
ABSTRACT:
A tripod head comprises a panning braking device having a plurality of braking units with different braking forces which is supported on a panning shaft, and a torque switchover mechanism allowing to freely switch over torque on the side of said braking units; a weight balancer having a plurality of spring units, in which one or a plurality of spiral springs with different elastic forces are incorporated, supported on a tilting shaft and a righting moment switchover mechanism allowing to freely switch over a righting moment against the tilting on the sides of the spring units; a tilting braking device having a plurality of braking units with different braking forces which is supported on said tilting shaft, and a torque switchover mechanism allowing to freely switch over torque on the sides of the braking units; and a sliding plate device having a set spring capable of freely floating and sinking, said set spring being in contact with one of the side end surfaces of the sliding plate for securing a device such as a camera, a video camera, a movie camera or the like which is slidable in the longitudinal direction against a camera stand, and supporting said sliding plate under pressure.
REFERENCES:
patent: 2155594 (1939-04-01), Hart
patent: 4447033 (1984-05-01), Jaumann et al.
patent: 4690252 (1987-09-01), Kottke et al.
patent: 4959671 (1990-09-01), Ishikawa
patent: 4979709 (1990-12-01), Ishikawa
Heiwa Seiki Kagya Co., Ltd.
Oberleitner Robert J.
Rutherford Kevin D.
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