Motors: expansible chamber type – Differential – Motive fluid constantly applied to one working member face
Patent
1979-04-23
1981-05-05
McCarthy, Edward J.
Motors: expansible chamber type
Differential
Motive fluid constantly applied to one working member face
91321, F15B 1517
Patent
active
042651646
ABSTRACT:
A pressure detecting device for detecting air pressure by means of a pressure receiving member which is energized by a coil spring, wherein a seal is provided between the side wall of the detector housing at the pressure detecting port side and the pressure receiving member as well as between the other side wall of the housing at the discharge port side and the pressure receiving member and further sealing area at the discharge port side is larger than that at the pressure detecting port side.
As a preferred application of the pressure detecting device a control system for a press machine is constructed such that operation and stop of the press machine are controlled by way of controlling supply and discharge of pressurized air to and from the press machine with the aid of a double valve and the pressure detecting device.
As another preferred application of the pressure detecting device a stroke ends detecting system for a pneumatic cylinder is constructed such that both pressure chambers in the pneumatic cylinder divided by the piston are communicated with the pressure detecting ports of the pressure detecting devices.
REFERENCES:
patent: 1511425 (1924-10-01), Roucka
patent: 3079900 (1963-03-01), Hunnicutt
patent: 3598020 (1971-08-01), Blok
patent: 3691907 (1972-09-01), Paschke
Iizuka Hiromichi
Maeda Eizo
Hoffmann Charles R.
Kabushiki Kaisha ASAHI Enterprise
McCarthy Edward J.
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