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:
Mar. 06, 2001
Filed:
Feb. 16, 1999
James A. Karnes, Erie, PA (US);
Other;
Abstract
A plastic duct section is equipped with integral connections on its ends. Each duct has indicia along its running length to facilitate cutting of the duct to a desired length. In one embodiment, the indicia may take the form of equally spaced circumferential ribs spaced along the length of the duct. These ribs are engaged by sets of fingers extending toward each other from concentric walls spaced to receive the straight end of an adjacent duct section. The innermost end of the concentric walls is equipped with a layer of insulative material to enable sealing engagement between duct sections significantly reducing pressure loss. Attached straps permit duct sections to be easily suspended between adjacent joists. A floor-mounted elbow boot is equipped with a removable plastic cover to prevent dust, dirt and debris from accumulating in the installed heating duct during finish construction of the building.