Abstract: A control system and method for a vacuum attachment system has a programmable controller that interprets feedback from vacuum level sensors and battery sensors to responsively provide warnings and limit or alter machine functions to reduce risk exposure. Vacuum levels and vacuum level change over time are used to evaluate conditions such as vacuum generator function, excessive altitude, vacuum system condition and leakage due to incompatibility of attachment device and load. Warnings are engaged if parameters or limits are not met. At designated/calculated thresholds and conditions the device can adjust its utilization of resources to ensure the safest condition. If conditions are detected that indicate a reduced ability to maintain the attachment, the programmable controller may limit functions such as preventing the operator from initiating another attachment.

Abstract: A tilt-top table is described having features that facilitate tilting a top frame between an upright storage and transport condition and a horizontal operative condition. The top frame is connected to a primary support platform and a secondary support brace by a linkage arrangement that facilitates independent pivotal motion of the secondary support brace and the tilt-top frame between upright storage and transport conditions and substantially horizontal, operative conditions. The secondary support brace will pivot from a location above and within the width dimension of the primary support platform to an outboard position, upright to receive and partially support the tilt-top frame when pivoted to the horizontal orientation.

Abstract: A source of fluid, regulated as to pressure intensity before entry into a control valve assembly, drives a fluid biased piston motor. A mechanically actuated and fluid held valve in the control valve assembly controls pressurization of a pressure chamber in the piston motor displacing the motor piston through its return stroke. Pressure differential on opposite sides of a fluid operated valve actuator insures rapid opening of the valve and holding thereof in its open position during the motor piston return stroke. At the end of the return stroke, the pressure differential is eliminated to allow spring-biased closing of the valve and venting of the pressure chamber.