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:
Feb. 21, 1984
Filed:
May. 26, 1982
Masami Kataoka, Kariya, JP;
Nobumasa Higo, Toyota, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A flow rate transducer has a housing in which a cylindrical fluid chamber and a support portion surrounded by an annular guide groove formed coaxial with the fluid chamber are formed. Rotatably carried by the support portion is a vane wheel having plate pieces arranged circumferentially of the vane wheel at regular intervals and extending in the guide groove. A light emitting element and a light receiving element are disposed to face a locus defined by the rotated plate pieces so that, every time the plate pieces pass by the light receiving element, the light receiving element produces an electrical signal to measure the flow rate of a fluid in the fluid chamber. The support portion has vane wheel speed adjusting chambers each having an L-shaped configuration and opening to said guide groove for minimizing the flow rate measurement errors of the flow rate transducer both in the high and low rate regions.