Pneumatic Lifting Device
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
Rodless cylinder 10 is controlled by a pneumatic circuit to lower obje into a tank 12 that contains a corrosive chemical bath emitting fumes that could be ignited by sparks from electrically controlled circuits. Pressing the start button 14 activates the first stage of module 16. starting time 18 and activating shuttle valve 20 to cause air to pass from source 24 to the top of the rodless cylinder 10, thereby lowering an object on the arm 26 into the chemical bath. When the timer 18 times out, air from the timer is fed to the first stage of module 16 to turn the first stage off and activate the second stage of the module 16.