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:
Sep. 08, 2009
Filed:
Oct. 01, 2003
Applicants:
Daniel J. Swistak, Newmarket, NH (US);
James J. Burnes, Deep River, CT (US);
Inventors:
Daniel J. Swistak, Newmarket, NH (US);
James J. Burnes, Deep River, CT (US);
Assignee:
Infiltrator Systems, Inc., Old Saybrook, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02B 11/00 (2006.01); F16L 9/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
A leaching chamber has sidewall perforations which flare inwardly, so that the smallest perforation dimension is on the exterior surface of the sidewall. The basic axes of the perforations run downwardly toward the chamber base, as the axes run from the inside to outside of the chamber. Mold cores having inwardly retracting slides, and which move in complex ways, are used to form the chamber. Thus, perforations are present down near the base flange of the sidewall, even though the base flange has an upwardly extending fin.