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:
Dec. 21, 1976
Filed:
Nov. 10, 1975
Applicant:
Inventors:
Marvin H Grove, Houston, TX (US);
Ronald G Dunegan, Katy, TX (US);
Assignee:
M & J Valve Company, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G01F / ;
U.S. Cl.
CPC ...
73-3 ;
Abstract
Undirectional meter prover apparatus for checking and calibrating liquid flow meters. An interchange for transferring a sphere from the outlet to the inlet end of a metering pipe is provided with a shuttle assembly having backflow preventing means which seals the interchange body against backflow for certain operating conditions, particularly when the shuttle assembly is at or near sphere receiving position. Preferably guide means is provided which is engaged by the backflow preventing means.