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:
Dec. 25, 2007
Filed:
Jul. 09, 2004
Douglas L. Blocker, Festus, MO (US);
John F. Kaido, St. Louis, MO (US);
Keith R. Green, Bonneterre, MO (US);
Douglas L. Blocker, Festus, MO (US);
John F. Kaido, St. Louis, MO (US);
Keith R. Green, Bonneterre, MO (US);
Tacony Corporation, Fenton, MO (US);
Abstract
A vacuum cleaner is provided having a cleaning head and a main body pivotally mounted to the cleaning head which includes a counter-balance mechanism having at least one torsion spring with a first end thereof mounted for pivotal movement about a fixed axis in either the cleaning head or the main body and a second end thereof mounted for pivotal movement about a fixed axis in the other of the cleaning head or the main body, with the at least one torsion spring having a main body portion which is free to move as the main body of the vacuum cleaner is pivoted relative to the cleaning head, the counter-balancing force of the at least one torsion spring increasing as the main body of the vacuum cleaner is pivoted from a generally vertical position to a generally horizontal position while the cleaning head remains generally horizontal.