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:
Sep. 28, 2010
Filed:
Dec. 19, 2007
William H Wayman, Ontario, NY (US);
David B Playfair, Penfield, NY (US);
William H Wayman, Ontario, NY (US);
David B Playfair, Penfield, NY (US);
Xerox Corporation, Norwalk, CT (US);
Abstract
A teeter-totter valve device for metering magnetic particles from a hopper includes (i) a tube connected to the hopper for flow of magnetic particles out of the hopper; (ii) a teeter-totter member having a first arm including a first distal end, and a second adjustable arm including a second distal end; (iii) a support assembly supporting the teeter-totter member on and spaced from the tube; (iv) a first magnet located at the first distal end; (v) a second magnet located at the second distal; and (vi) a moving assembly for moving each of the first magnet and the second magnet towards and away from a first near point and a second near point on the tube to create or remove a point magnetic field and magnetic particles dam within the tube, thereby stopping or allowing flow of a desired quantity of magnetic particles past the first near point and past the second near point.