The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2012
Filed:
Sep. 08, 2009
Jonathan Gamble, Taylors Falls, MN (US);
Ron Flanary, Blacksburg, VA (US);
Robert L. Hosfield, Centerville, MN (US);
Harold Mccabe, Roseville, MN (US);
Martin Piedl, Radford, VA (US);
Charles Ford, Blacksburg, VA (US);
Troy Anderson, Blacksburg, VA (US);
Jonathan Gamble, Taylors Falls, MN (US);
Ron Flanary, Blacksburg, VA (US);
Robert L. Hosfield, Centerville, MN (US);
Harold McCabe, Roseville, MN (US);
Martin Piedl, Radford, VA (US);
Charles Ford, Blacksburg, VA (US);
Troy Anderson, Blacksburg, VA (US);
Sta-Rite Industries, LLC, Delavan, WI (US);
Abstract
Embodiments of the invention provide a fire-extinguishing system for injecting foamant into a stream of water. The system can include a flow meter determining a flow rate of the stream of water and a foam pump having an inlet coupled to a supply of foamant and an outlet coupled to the stream of water. The system includes a servo motor driving the foam pump. The servo motor includes a sensor used to determine a rotor shaft speed and/or a rotor shaft torque. A controller can control an operating speed of the servo motor using closed-loop control depending on the flow rate and the rotor shaft speed and/or the rotor shaft torque.