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. 26, 1992
Filed:
Jul. 09, 1991
Roger D Williams, Dallas, NC (US);
Pneumafil Corporation, Charlotte, NC (US);
Abstract
Apparatus for filtering or collecting dust or other particulate matter which includes a plurality of filter elements that must be cleaned at periodic intervals by emitting a burst of cleaning air into the interior of the filter element so that it flows in a reverse direction to the normal flow of the transport air to remove particulate matter accumulated on the surface of the filter element. The cleaning air is emitted from a plurality of nozzles mounted on a horizontal arm that rotates above the filter elements, and each nozzle is provided with its own valve which can be opened to connect the nozzle to a source of pressurized cleaning air. A microprocessor is programmed to receive a reference signal when the horizontal arm reaches a predetermined point in its movement, after which the microprocessor is programmed to operate each of the valves in a predetermined sequence and at a predetermined timed frequency.