Patent ID: 6073913
Filing Date: 2000-06-13
Classification: B66F,F15B,Y10T

Abstract:
In a camera dolly of type having an arm raised and lowered by a hydraulic actuator, controlled by a 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, the improvement comprising:a down detent slot in the boom control;a closed detent slot in the boom control;an up detent slot in the boom control; anda detent element on the camera dolly positioned to engage one of the detent slotsand 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, and the arm remaining in position, when the detent element is in or between the down and up detent slots.