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:
Nov. 20, 2012
Filed:
Jun. 27, 2008
Michael A. Stoy, Bothel, WA (US);
Nicholas Jordan, Big Harbor, WA (US);
Nicholas Aadland, Kirkland, WA (US);
Michael Carrol, Roy, WA (US);
Jason Drexler, Covington, WA (US);
Moses Boone, Palouse, WA (US);
Michael A. Stoy, Bothel, WA (US);
Nicholas Jordan, Big Harbor, WA (US);
Nicholas Aadland, Kirkland, WA (US);
Michael Carrol, Roy, WA (US);
Jason Drexler, Covington, WA (US);
Moses Boone, Palouse, WA (US);
Nilfisk-Advance, Inc., Plymouth, MN (US);
Abstract
A novel suction head for a carpet cleaning wand wherein either or both of two designs are utilized. Each design utilizes a generally fan shaped internal suction channel that fairs smoothly between an exhaust channel of substantially round cross section and lips of an intake opening having a much wider and substantially rectangular cross section. The internal suction channel utilized by one design is formed with a cross section that is non-uniform when viewed along the direction of air flow through the wand, which is a dramatic contrast to the uniform cross sections of known current designs. Another design utilizes an internal airfoil interrupting the internal suction channel along its centerline for diverting the air flow more towards the outside edges of the internal suction channel.