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. 15, 2000
Filed:
Apr. 21, 1997
Tom Edward Estep, Chesterfield, VA (US);
Ronald P Hoffman, Glen Mills, PA (US);
James R Hunter, Chadds Ford, PA (US);
Jean Joseph Muller, Kopstal, LU;
Germain Schilz, Mondercange, LU;
Carl E Vorhees, Newark, DE (US);
James M Wiggins, Midlothian, VA (US);
Jean Francois Woll, Bettembourg, LU;
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
This invention relates to an arrangement for sealing a closed chamber in which equipment is to be replaced and especially to a chamber in which equipment is to be replaced while the chamber is to be maintained closed. The arrangement includes a channel filled with a fluid, such as water, and a skirt arranged to extend into the fluid to form the seal. As the skirt extends down into the liquid, a portal space is formed at the opening in the chamber and the opening preferably includes a gate for closing the chamber from the portal space and the outside.