2006-12-02 04:55:17 · 2 answers · asked by NANCY C 1 in Science & Mathematics ➔ Engineering
Pneumatics would require an air compressor, solenoid valve(s), regulators and hydraulics a pump, valves, regulator, solenoids. You simplest way to go would be with an electric solenoid release and a spring or counter weight return mechanism. Make sure that the electric solenoid is rated for at least twice the weight it will have to hold without giving way to the load. Same goes for the hinges. You counter weight needs to be less that the weight you will be dropping yet enough to pull the door closed and latch it secure. Be carefull your not the first to drop through it.
2006-12-02 05:09:21 · answer #1 · answered by RUDOLPH M 4 · 0⤊ 0⤋
Assuming that you want to hold the door safely in position, and release it in an instant, I would recommend using what is called a "linear actuator" for the latch mechanism. Just do a web search and you will find that they are in are available in electric, pneumatic and hydraulic and are relatively inexpensive. They consist of a cylinder with a shaft that moves in or out when activated and then returns to its normal position when deactivated. You will also need to consider the length of the stroke.
2006-12-02 15:09:18 · answer #2 · answered by questionable reality 3 · 0⤊ 0⤋