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:
Aug. 26, 1997
Filed:
Dec. 11, 1995
Applicant:
Inventors:
Garrett S Yarbrough, Chicago, IL (US);
Nabil L Mina, Roselle, IL (US);
Assignee:
Appleton Electric Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02G / ;
U.S. Cl.
CPC ...
174 50 ; 210266 ; 220371 ; 405 52 ; 405303 ;
Abstract
An explosion proof drain for incorporation into an enclosed electrical system including a hollow housing with an opening at an upper end and an annular flange circumscribing a smaller opening at a lower end. A porous, metallic disk is force fitted into a bore in the housing and seated against the annular flange. A filling material is poured into the bore of the housing and is supported by the porous metallic disk. A second porous, metallic disk is force fitted into the opening in the upper end of the drain to ensure that the sand does not exit the drain.