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. 30, 1978
Filed:
Aug. 02, 1976
Robert H Edmunds, Glenview, IL (US);
John R Huebner, Arlington Heights, IL (US);
James A Skurka, Niles, IL (US);
Francis B Wilson, Wauconda, IL (US);
Vapor Corporation, Chicago, IL (US);
Abstract
A valve for controlling the pressure within a tank to prevent excessive above or below atmospheric pressure conditions, including a pressure responsive valve and a vacuum responsive valve, wherein each valve includes a pallet with seals and blowdown rings of polytetrafluorethylene material, which is commercially marketed under the trademark Teflon. The pressure pallet includes guide means having Teflon parts, while the vacuum responsive valve includes hinge means having coacting Teflon parts. The breather valve includes structure defining a vertically extending vent structure having an opening arranged alongside the tank in which the valve is mounted, which opening is positioned to avoid being sealed by any normal buildup of ice and snow.