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:
Aug. 30, 1988
Filed:
Jan. 15, 1988
Applicant:
Inventors:
Raymond G Rohlfing, Bartlesville, OK (US);
Donald D Norwood, Bartlesville, OK (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
222219 ; 422219 ; 137240 ;
Abstract
A rotating metering valve having a transverse passage which carries a slidable piston reciprocating once for each revolution of the valve for metering particulate material from an inlet port to an outlet port is provided with a dumbbell shaped piston and a purge fluid port in the transverse passage to ensure reliable operation, even while metering small quantities of particulate.