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:
Apr. 21, 2009
Filed:
Nov. 18, 2005
William George, Parkton, MD (US);
John Kohlman, Columbia, MD (US);
Stuart R. Amos, Phoenix, MD (US);
William George, Parkton, MD (US);
John Kohlman, Columbia, MD (US);
Stuart R. Amos, Phoenix, MD (US);
HRP Technology, Inc., Baltimore, MD (US);
Abstract
A rotary valve having inner and outer sleeves includes multiple ports configured to provide pressure and vacuum pulses when the sleeves are rotated with respect to each other. A source of pressure and vacuum is connected to the rotary valve, and the inner sleeve is rotated to generate pressure and vacuum pulses. The alternating pressure and vacuum pulses may be used to remove obstructions in conduits such as piping systems. The rotary valve may also provide static positions where no vacuum or pressure is available. The valve may be motor driven and the pressure/vacuum pulse frequency may be controlled based upon the relative speed of rotation of the sleeves.