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:
Apr. 11, 1995
Filed:
Jul. 02, 1993
John A Vallomy, Charlotte, NC (US);
Consteel, S.A., Geneva, CH;
Abstract
A method and apparatus for limiting the passage of a gas such as air through an opening, particularly an opening through which solid material passes, by providing a sealing chamber in advance of the entrance to the low pressure chamber having a large plenum with a variable speed exhaust blower in its upper portion, and a grate situated in its lower portion for access of air to the plenum. The blower speed is responsive to differential pressure measurements taken in the low pressure chamber and immediately adjacent the exterior of the low pressure chamber. Upstream of the plenum are one or more mechanical seals or flexible baffles which contact the top of the solid charge material and ride over it as the solid material passes beneath the mechanical seal.