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:
Oct. 08, 2002
Filed:
Oct. 21, 1994
Sidney A. Taylor, Houston, TX (US);
Stanley J. Rogala, Houston, TX (US);
Andrzej Stenzel, Houston, TX (US);
CRC-Evans Rehabilitation Systems, Inc., Houston, TX (US);
Abstract
A pipeline treating apparatus ( ) is disclosed which is used to clean the exterior of a pipeline ( ) with high pressure air with entrained abrasive. The apparatus has an improved classifier and separator to separate the abrasive grit from lighter debris which includes a classifier and separator within a manifold duct ( ) which returns the grit to a collection pan ( ) for recovery and causes the lighter airborne dust to be removed through a return duct ( ). A series of pressure relief filters ( ) reduce the air pressure within a blast chamber ( ) and resist debris escaping from the blast chamber past the triple seals ( ). The blast nozzle assemblies ( ) are attached to the nozzle oscillating frames by snap fittings ( ) which avoids threaded connections which may become contaminated by the debris.