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:
Jun. 02, 2015
Filed:
Oct. 08, 2010
Paul Andrew Mcluckie, Malmesbury, GB;
William David Postle, Malmesbury, GB;
Samuel James Czerpak, Malmesbury, GB;
Christopher Thomas Watson, Malmesbury, GB;
Leigh Michael Ryan, Malmesbury, GB;
Paul Andrew McLuckie, Malmesbury, GB;
William David Postle, Malmesbury, GB;
Samuel James Czerpak, Malmesbury, GB;
Christopher Thomas Watson, Malmesbury, GB;
Leigh Michael Ryan, Malmesbury, GB;
Dyson Technology Limited, Malmesbury, Wiltshire, GB;
Abstract
A surface treating appliance includes a surface treating head, a hose, and a main body including a fan unit for generating a flow of fluid, and a rotary changeover valve including a valve member which is selectively rotatable between a first position allowing fluid flow between the hose and the fan unit, and a second position allowing fluid flow between the surface treating head and the fan unit, the valve member comprising a hub having an internal surface shaped to receive a boss about which the valve member is selectively rotatable. To facilitate the breaking of seals by valve member and other parts of the appliance as the valve member moves away from one of its first and second positions, the external surface of the boss and the internal surface of the hub each has a profile generally in the form of a triangular prism, the profile of the external surface of the boss tapering towards the valve member. As a result, the valve member is forced to move along the longitudinal axis of the boss as it is rotated thereabout.