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. 26, 1982
Filed:
Mar. 12, 1979
Pramodh Nijhawan, Indianapolis, IN (US);
Joseph M Duckworth, Zionsville, IN (US);
The Bahnson Company, Winston-Salem, NC (US);
Abstract
A fumes control system duct-and-car arrangement for a duct including a wall portion closed by a flexible web, and a support structure in the duct under the web to prevent collapse of the web into the duct under evacuation includes a car disposed for movement along the duct to raise the web and couple the interior of the car to the interior of the duct. The car is provided with a door which can be opened to gain access to the interior of the car. The support structure for the web provides an access way so that maintenance and inspection personnel can move from the interior of the car into the interior of the duct. Various types of apparatus for moving the car along the duct include a motor mounted on the car and a wheel supporting the car from the duct and driven by the motor. Another motive mechanism provides a motor mounted beyond one of the limits of travel of the car along the duct, and a flexible cable, chain or the like, pulled by actuation of the motor to move the car along the duct.