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:
Jan. 03, 1989
Filed:
Jul. 10, 1987
Applicant:
Inventors:
Russell B Gordon, Atlantic Beach, FL (US);
Jimmy A Gordon, Atlantic Beach, FL (US);
Marion W Smith, Daphne, AL (US);
Assignee:
Saddle Vent Inc., Atlantic Beach, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15D / ;
U.S. Cl.
CPC ...
138 39 ; 138106 ;
Abstract
Air ventilation conduit for passing through manhole the conduit having a central section with a cross section having the shape of a crescent or a segment of a circle where it passes through the manhole to provide a minimum of obstruction for men and equipment passing through the manhole, cylindrical outer sections of the conduit for connection to flexible hose, and intermediate sections of varying cross section to connect the central section to the cylindrical outer sections offset away from the manhole.