Drag unit for a tripod head

Details Drag unit for a tripod head Drag unit for a tripod head

1995-03-31

1996-07-30

Lorence, Richard M.

Supports

Stand

To hold a particular article

2481831, 192 5843, 1883225, 352243, 354293, F16M 1112, F16D 5700

Patent

active

055404081

ABSTRACT:
A drag unit of the present invention is provided with a case; a drag disc disposed in the inner portion of this case; a hollow axis supporting these case and drag disc coaxially, a pair of long holes being formed at a side of the axis; a lid of the case; viscous fluid sealed between these case and lid; and a sliding axis having a pin connected to the drag disc, the pin being inserted into the inner portion of the axis and piercing the long holes of the axis so that the pin can slide along the long holes. Either of the case or the drag disc is connected to a tripod head so as to rotate with rotation of the tripod head. A plurality of first projections disposed coaxially are provided on an inner bottom surface of the case and a plurality of second projections provided on an bottom surface of the drag disc. These projections are engagable with each other.

REFERENCES:
patent: 3552699 (1971-01-01), Baker
patent: 3822769 (1974-07-01), O'Connor
patent: 5389972 (1995-02-01), Cartoni

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