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:
Jul. 28, 1992
Filed:
Sep. 20, 1990
Applicant:
Inventors:
Gabriel J Pietrykowski, Bryan, OH (US);
Lawrence W White, Bryan, OH (US);
Assignee:
The Aro Corporation, Bryan, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
138 30 ; 138 26 ; 220721 ;
Abstract
A bellows is comprised of a unitary body formed of relatively thin annular walls, open at one end and closed at the other. The walls are constructed and arranged as a spiral groove, whereby the bellows can be fabricated from plastic by injection molding in a relatively inexpensive fashion. The bellows can be formed of two layers joined to one another, a backup layer formed of metal or plastic and a protective layer formed of plastic such as PFA and PVDF.