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:
Jan. 04, 2011
Filed:
Sep. 18, 2003
Applicants:
Paul Cedric Campbell Hackwell, Atworth, GB;
Simon Nicholas Langham, Pangbourne, GB;
Inventors:
Paul Cedric Campbell Hackwell, Atworth, GB;
Simon Nicholas Langham, Pangbourne, GB;
Assignee:
Dyson Technology Limited, Malmesbury, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A47L 5/10 (2006.01); A47L 5/26 (2006.01); A47L 5/00 (2006.01); A47L 9/00 (2006.01); A47L 9/04 (2006.01); A47L 9/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A vacuum cleaning head includes a rotatable brush bar and an air turbine driving the brush bar. An air inlet admits air to drive the turbine. A button is movable between an open position, in which it admits air to the turbine, and a closed position in which it closes the inlet and prevents air from reaching the turbine. The button is movable in response to the speed of rotation of the turbine or to the flow of air to or through the turbine exceeding a predetermined limit.