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:
Mar. 26, 1991
Filed:
Aug. 13, 1990
Christopher R Merritt, Indianapolis, IN (US);
Ransburg Corporation, Indianapolis, IN (US);
Abstract
A flow of gas entraining particulate material is passed through a filter having an upstream side and a downstream side, with the particulate material remaining on the upstream side while the gas flows to the downstream side. The downstream side exhausts through an opening into a plenum chamber wherein a second valve is provided for intermittently providing a cleaning gas flow in the reverse direction through the filter to remove particulate material from the upstream side. Cleaning gas under pressure is provided to the second valve, opening of the second valve permitting cleaning gas to flow therefrom. A first valve controls gas flow through the opening, the first valve operating in synchronism with the second valve substantially to stop flow through the filter from the upstream side to the downstream side when the second valve provides the cleaning gas flow. The first valve includes a cylindrical throat having a first end and a second end. The first end is coupled to the second valve to receive the intermittent cleaning gas flow therefrom. A seat is defined in the throat. A valve member has a head reciprocably slidably engaging the throat and captured between the first end and the seat, a valve closure portion, and a stem for coupling the valve closure portion to the valve head. The stem provides a cleaning gas passageway between the head and closure portion when the second valve is providing cleaning gas flow.