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:
Mar. 24, 1992
Filed:
Sep. 20, 1990
Milton S Isaacson, Dayton, OH (US);
Donald D Kinsworthy, Dayton, OH (US);
Saed M Mubaslat, Miamisburg, OH (US);
Nu-Tech Industries, Inc., Dayton, OH (US);
Abstract
A liquid fogging apparatus has a motor which operates from the 12 volt power supply of a vehicle and delivers high torque at high speed, operating aproximately at 0.2 horsepower at 28,000 RPM. A rotating ring of porous ceramic material atomizes the liquid. The motor is small, 1.6' in diameter with a 5/8' diameter rotor. The stator has four phases each preferably containing eight three-turn windings of four strand wire, wound in slots in the outer surface of a short laminated stack, which is reinforced in epoxy with its inner surface honed to minimum thickness to reduce flux leakage. Eight bipolar permanent magnets are set in axial slots of a rotor stack with like poles facing tangentially toward each other around the rotor shaft. A controller commutates the motor sensing back-EMF on the windings to control speed and detect motion during start-up. Start-up is accomplished with a fixed frequency external oscillator which sequentially energizes the coils, followed by DC commutation until the motor accelerates, then pulse-width control of operating speed. The motor drops to an idle speed when the load is removed. An inhibit signal disables the fogger pump if motor speed is too low.