The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 1978
Filed:
Sep. 10, 1976
Chadwell O'Connor, Newport Beach, CA (US);
Other;
Abstract
A panhead for mounting, panning and tilting instruments such as cameras, the panhead having an adjustable drag system accomplished by providing a pressurized compartment for each of the shafts for panning and tilting, each of the shafts being provided with a flange having pre-loaded roller bearings operating against both surfaces of the flange. The compartment is filled with extremely viscous fluid under pressure, operating against the force of a spring loaded piston within the tilting shaft, the pressure, and consequently the drag, being reducible from the pre-set pressure by an adjustment screw urging the piston against the force of its spring. The tilting shaft assembly is provided at the opposite end thereof with a crank coacting with a spring assembly to provide a counter-balancing moment to offset the moment due to the shift in the center of gravity of the instrument during tilting thereof, the spring force being adjustable to compensate for varying weights of different instruments.