Speed control device for a pneumatic cylinder

Motors: expansible chamber type – With motive fluid valve – To provide unequal inlet and exhaust flow rates to single...

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91444, 91447, 91448, 91433, 91461, 13759616, 1376275, 60370, 60415, F15B 1108

Patent

active

051845350

ABSTRACT:
A speed control device for a pneumatic cylinder of the invention is characterized in that a speed control of the pneumatic cylinder can be changed from air pressure to air mass flow by a two-way valve and an airflow control valve. Therefore, an ordinary and low moving speed of a load is maintained even if the load changes its speed or stops moving, and thus any accidents caused by a change of the moving speed of the load are prevented beforehand. Additionally, since in this invention only a two-way valve and an airflow control valve are added to a conventional pneumatic cylinder and high relief type pressure reducing valve, the device of the invention is simply constructed and has a wide variety of usage. Furthermore, since the device of the invention is provided with a pressure accumulator and a checking valve, the pneumatic cylinder can be stably controlled even when the load moves at a high speed.

REFERENCES:
patent: 3171331 (1965-03-01), Samuel
patent: 3991570 (1976-11-01), Keller
patent: 4018050 (1977-04-01), Murphy
patent: 4175473 (1979-11-01), Iizumi
patent: 4262695 (1981-04-01), Iizumi
patent: 5065665 (1991-11-01), Kimura

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