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:
Oct. 16, 1984
Filed:
Sep. 30, 1982
Richard S Brumm, Orinda, CA (US);
Grove Valve and Regulator Company, Oakland, CA (US);
Abstract
An orifice meter including a carrier, which is movable between two parallel body walls while maintaining sealing engagement therewith. In one position it seals around the pipeline flow passage, and in a second position it seals around an orifice disc service opening in one of the body plates. A small, axially movable valve plug in the body plate adjacent the service opening is operative in one position to equalize the pressure in the space within the carrier seals with the rest of the valve body and in a second position to vent that space to atmosphere. Interengaging means on the valve plug and a rotatable closure for the service opening prevent removal of the closure unless the valve plug is in its venting position. The valve plug has two annular grooves, each carrying an O-ring to seal against inner surfaces of axially aligned inner equalizing passage and outer vent passage. A transfer duct opens from between the two passages to the space within the service opening. Bypass ducts opening from the grooves prevent O-ring dislodgement.