Motors: expansible chamber type – With motive fluid valve – To provide unequal inlet and exhaust flow rates to single...
Patent
1991-06-24
1993-02-09
Look, Edward K.
Motors: expansible chamber type
With motive fluid valve
To provide unequal inlet and exhaust flow rates to single...
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
Look Edward K.
Mattingly Todd
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