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:
Nov. 30, 1982
Filed:
Nov. 20, 1980
Robert J deFasselle, Gates Mills, OH (US);
Craig R deFasselle, Willoughby, OH (US);
Other;
Abstract
An improved flowmeter is disclosed for measuring the flow rate of a fluid such as a gas or a liquid. The flowmeter comprises a body portion including a fluid inlet and a fluid outlet. A core tube is vertically disposed within the body portion to be in fluid communication with the fluid inlet. A tapered recessed groove extends along the core tube to provide a fluid path adjacent the core tube in fluid communication with at least the fluid outlet of the body portion. A piston is located within the core tube to expose a variable amount of the tapered recessed groove to the fluid inlet upon movement of the piston within the core tube. The fluid flow moves the piston relative to the recessed groove to an equilibrium position determined by a single cross-sectional area of the tapered recessed groove for a given flow. Means are provided for indicating the position of the piston for determining the volumetric flow rate of the fluid.