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.:

US 6668851 B1

PDF
Full Text
Expired
Date of Patent:
Dec. 30, 2003

Filed:

Apr. 03, 2002
Applicant:
Inventors:

Dale L. Hunsberger, Rockford, IL (US);

Jack A. Price, Freeport, IL (US);

Assignee:

Suntec Industries Incorporated, Rockford, IL (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F17D 1/00 ; F16K 2/300 ;
U.S. Cl.
CPC ...
F17D 1/00 ; F16K 2/300 ;
Abstract

A plug for plugging a first port and blocking insertion of a second plug into a second port of a fluid system. The plug includes a threaded plug portion and a blocking stem portion extending from the threaded plug portion. The stem portion projects into the second port and blocks insertion or mounting of a second plug and thereby keeps the second port unplugged. In a disclosed embodiment, the plug is mounted into the return port of an oil pump unit of an oil burner to block bypassed flow from returning to the local reservoir of the oil pump unit. This prevents two plugs from being inadvertently mounted that could otherwise block all bypass flow in the pump unit and cause excess pressure build ups and blown seals.


Find Patent Forward Citations

Hunsberger, Dale. (2003). Fool-proof plug in fluid system (U.S. Patent No. 6668851). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6668851

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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