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:
May. 13, 1997
Filed:
Nov. 08, 1994
Perin E Truax, Caledonia, MI (US);
James G Retzloff, Lansing, MI (US);
The Viking Corporation, Hastings, MI (US);
Abstract
A sprinkler head includes a powdered metal base including external threads for threadably engaging a water pipe, and a stamped metal frame attached to the base. The base defines a passageway for receiving water from the water pipe and an opening to the passageway. The powdered metal base is infiltrated with copper or vacuum infiltrated anaerobic resin to provide a hydrostatically leak tight composition capable of withstanding 700 psi. A deflector is attached to the frame for distributing water dispensed from the opening. A circular plate or circular spring sealingly covers the opening, and a pip is engaged with the frame creating a space therebetween. A frangible bulb is positioned in the space between the Belleville spring. The frangible bulb is made of a temperature-sensitive material that fractures at a predetermined temperature and thus allows water pressure from water in the water pipe to unseat the spring and thus spray water. A capacitor discharge weld is shown for connecting the frame to the base and for connecting the base to the pip so that the frangible bulb is retained with a predetermined force despite dimensional variation in the frangible bulb.