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Electronic control system for pneumatic-hydraulic pump dredge

  • US 4,353,174 A
  • Filed: 08/11/1980
  • Issued: 10/12/1982
  • Est. Priority Date: 08/11/1980
  • Status: Expired due to Term
First Claim
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1. A control system for a dredging device comprising a plurality of chambers, each chamber including an air port through which air can be delivered to and exhausted from the chamber, a material discharge port, a material suction port, and air port control means for alternately exhausting air from the chamber to admit material to the chamber through the suction port and delivering air to the chamber to discharge material from the chamber through the discharge port, said control system comprising:

  • electrically energizable actuator means coupled with said air port control means and responsive to predetermined electrical control signals for causing actuation of said air port control means to a first position for said exhausting of air from the chamber, to a second position for said delivering of air to the chamber and to a third, intermediate position for effectively closing off the chamber to either air delivery or air exhaust, and electronic control means for providing said predetermined electrical control signals in a preselected cycle for cyclically operating all of said air port control means for admitting material to each chamber and discharging material from each chamber in said preselected cycle comprising the operation of the air port control means of each of said chambers in a time-staggered sequence with respect to that of each of the other chambers, whereby to provide a relatively uniform flow of material from the dredging device, said electronic control means further including controllable timer means for regulating said preselected cycle and operator adjustable control means for selectively varying said controllable timer means during operation of said dredging device so as to regulate said preselected cycle to achieve and maintain optimum efficiency of the dredging device.

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