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. 11, 1981
Filed:
Aug. 20, 1979
Nils O Rosaen, Clarkston, MI (US);
Other;
Abstract
A fluid flow meter is provided and comprises a housing having a fluid inlet and a fluid outlet and a fluid passage for connecting the inlet with the outlet. The fluid passage further includes an elongated cylindrical chamber having one end open to the inlet and the other end open to the outlet while a piston is axially slidably mounted within this housing chamber and is movable between a first and second position. The outer periphery of the piston is sealed with respect to the housing. The piston includes a removable orifice plate having a fluid port open to the inlet end of the chamber while a fluid passage formed through the piston fluidly connects the port with the outlet end of the chamber. A rod is positioned within the housing and held in place by removable housing end covers. The rod includes a tapered portion positioned through the port which variably restricts the port in dependence upon the axial position of the piston. A resilient member urges the piston towards the inlet end of the chamber while an indicator is connected to the piston to provide an exteriorly visible signal of the axial position of the piston member and thus of the flow through the flow meter. Further, the piston assembly is constructed as a cartridge assembly so that the top cover can be removed and a new cartridge assembly installed quickly and easily. A set point is provided so that the new cartridge can be quickly zeroed.