F - Mech Eng,Light,Heat,Weapons – 16 – M
Patent
F - Mech Eng,Light,Heat,Weapons
16
M
F16M 11/40 (2006.01) B60P 1/48 (2006.01) B62B 3/00 (2006.01) B66F 11/04 (2006.01) F15B 13/02 (2006.01) F15B 13/04 (2006.01) F15B 21/04 (2006.01) H04N 5/247 (2006.01)
Patent
CA 2326985
The invention provides a camera dolly of a type comprising an arm raised and lowered by a hydraulic actuator, controlled by turning a boom control which is linked to a hydraulic valve and with the valve controlling the flow of hydraulic fluid to and from the actuator, wherein the dolly further comprises: a down detent slot in the boom control, a closed detent slot in the boom control, an up detent slot in the boom control and a detent element on the camera dolly positioned to engage one of the detent slots, and with movement of the boom control, in a direction, past the down detent slot causing a down channel in the valve to open and the arm to move down, and with movement of the boom control in a second direction, opposite to the first direction, past the up detent slot causing an up channel in the valve to open and the arm to move up, and with the up and down channels closed, the arm remaining in position, when the detent element is in or between the down and up detent slots. Also provided is a method of controlling the position of an arm of a camera dolly of this type.
Cette soupape hydraulique perfectionnée (60), destinée à un chariot de caméra (10), comprend des éléments d'insertion (86, 88) en Téflon<TM>, montés autour d'une goupille de soupape (82), afin de réduire les vibrations et le bruit. Selon l'invention, on a augmenté le rapport du mouvement entre la commande (16) de la grue, commandant le mouvement vers le haut et le bas du bras (12), sur le chariot (10), et l'ouverture et la fermeture de la soupape hydraulique (60), afin de diminuer la sensibilité de la soupape au déplacement de la grue. La commande de la grue comprend des détentes directes (64, 68), vers le haut et vers le bas, offrant à l'utilisateur une indication tactile lui permettant de savoir où positionner la commande de la grue, pour obtenir un déplacement immédiat vers le haut ou vers le bas.
Chapman/leonard Studio Equipment Inc.
Smart & Biggar
LandOfFree
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