Motors: expansible chamber type – Independently operated timer – delay – pattern or cyclic control – Independent distributor actuation for cyclic control
Patent
1999-06-16
2000-08-29
Ryznic, John E.
Motors: expansible chamber type
Independently operated timer, delay, pattern or cyclic control
Independent distributor actuation for cyclic control
91459, 91467, F15B 2102, F15B 1108
Patent
active
061091618
ABSTRACT:
When a start SW 3 is pressed, a one-shot multivibrator circuit 15 turns on and releases a pulse. The pulse is transmitted to a self-hold circuit 16 which in turn stays in self-hold mode and releases an H level output continuously until it is reset. This cause a transistor 17 to turn on and actuate a ram downward movement relay R1. When the ram arrives at the lower limit of its movement, a lower LS 4 is opened causing a self-hold circuit 21 to produce an H level signal in accordance with an output of a one-shot multivibrator 18. The H level signal from the self-hold circuit 21 is delayed by a delay circuit 22 and turns on a transistor 23. As the result, a ram upward movement relay R2 is actuated. Because of the function of the one-shot multivibrator circuit 15, the ram will not restart when the start SW 3 is continuously depressed. The delay circuit 22 contributes to the longer operational life of a directional valve switching mechanism. Also, a combination of another delay circuit 19 and a logical product circuit 24 is provided for preventing any fault action derived from chattering of the lower LS 4.
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Shimada Keisuke
Shoji Michihiro
Nitto Kohki Co. Ltd.
Ryznic John E.
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