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. 22, 2014
Filed:
Aug. 31, 2011
Karl K. Hoffman, Arlington Heights, IL (US);
Keith P. Hoffman, Rolling Meadows, IL (US);
Robert C. Larsen, Bartlett, IL (US);
Douglas A. Wielunski, Bartlett, IL (US);
Karl K. Hoffman, Arlington Heights, IL (US);
Keith P. Hoffman, Rolling Meadows, IL (US);
Robert C. Larsen, Bartlett, IL (US);
Douglas A. Wielunski, Bartlett, IL (US);
Plitek, L.L.C., Des Plaines, IL (US);
Abstract
A self contained one-way pressure relief valve for application to product packaging that does not require the addition of a sealing lubricant. Atop a base with an opening extending through the base is an adhesive-like material layer, and a dry strap of a silicone or other release film coated membrane, all of which are of gas impervious materials. The release film coated material layer covers the opening with the release film in contact with the adhesive-like material creating a surface attraction between the release film and the adhesive-like material. An intermediate layer of gas impervious material with an opening extending through such layer may be provided. A gas pervious filter material layer may be provided to block passage of fine particulates or liquid.