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:
Nov. 12, 2013
Filed:
Oct. 17, 2008
Wilhelmus P. H. Castricum, Ormond Beach, FL (US);
Wilhelmus P. H. Castricum, Ormond Beach, FL (US);
Helix International, Inc., Elk Grove Village, IL (US);
Abstract
An apparatus for expanding metal and forming tubing combines two metal-forming operations into a single process. Tubing, such as that used for filters, is desirably expanded so that air or liquid may pass thru 'diamonds' formed in the tubing. Expanding metal and forming tubing is accomplished in a single, continuous process by first slitting and expanding the metal, and then locking its seams to form a spiral pipe. This avoids depending on vendors for delivery of expanded metal at fluctuating prices, eliminates intermediate steps of handling the coils, and eliminates rusting while the expanded steel coils await formation into tubing. Tubing made from expanded metal may be used for air filters, oil filters, water filters, separators and other types of filters. Double-wall HVAC ducting systems or silencers can also use expanded material for reducing heat transfer and noise.