×

Sprayer controller and method

  • US 6,786,425 B2
  • Filed: 12/07/2000
  • Issued: 09/07/2004
  • Est. Priority Date: 05/27/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. A device for delivering a controlled dose of a fluid to an outlet from a fluid supply at an operating pressure, the device comprising:

  • an actively operable check valve;

    pressure exerting means to selectively exert first and second pressures on the check valve such that when one of the first and second pressures is exerted on the check valve the valve prevents the passage of fluid at operating pressure through the outlet, and when the other pressure is exerted on the check valve the valve permits the passage of spray fluid at operating pressure;

    signal generating means to generate a control signal characteristic of the fluid operating pressure; and

    control means for deriving at least one of the said first and second pressures from the said control signal.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×