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:
May. 15, 2001
Filed:
Jun. 11, 1999
James Dyson, Wiltshire, GB;
Geoffrey Michael Burlington, Crowborough, GB;
James Wilson Braithwaite, Bath, GB;
Notetry Limited, Wilshire, GB;
Abstract
A bleed valve (,) for introducing bled fluid to a mainstream fluid through apparatus (,) across which a pressure differential occurs, characterized in that the bleed valve (,) is adapted to open so as to bleed fluid into the mainstream fluid when the pressure differential across the apparatus (,) falls below a predetermined value. This arrangement is particularly appropriate to vacuum cleaners incorporating cyclonic dust-separating apparatus in that the bleed valve is more reliably operated in response to a reduction in airflow. This ensures efficient functioning of the cyclonic dust-separating apparatus and reduces the risk of overheating of the motor.