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. 08, 2008
Filed:
Feb. 16, 2005
Applicant:
Henry J. Gohlke, Houston, TX (US);
Inventor:
Henry J. Gohlke, Houston, TX (US);
Assignee:
Rectorseal Corporation, Houston, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16K 15/06 (2006.01); E03F 5/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
In some embodiments, an air admittance valve includes a base, a screen plate and a diaphragm engageable with the screen plate. The diaphragm may include a first center disk having a stem and a membrane coupled to the first center disk. The membrane may have a continuous material sized to extend beyond a perimeter of the first center disk, be formed of a material more pliable than the first center disk and be adapted to be coupled to the first center disk through the center disk stem.