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:
May. 28, 2019
Filed:
Jun. 09, 2016
Ckd Corporation, Komaki-shi, Aichi, JP;
Atsuyuki Sakai, Komaki, JP;
CKD Corporation, Komaki-shi, JP;
Abstract
A liquid supply system includes a pump having a fluctuating member separating pump and working chambers thereof, a supply and discharge section which supplies a working gas to the working chamber and discharges the working gas from the working chamber, a suction valve, a discharge valve, a pressure sensor for detecting the pressure within a space including the working chamber, a flow rate sensor for detecting the flow rate of the working gas, and a control section. The control section closes the discharge valve and opens the suction valve, calculates a change in the volume of the working chamber from the detected flow rate, controls the supply and discharge section such that the volume change becomes zero, and uses, as an estimated suction-side hydraulic head pressure of the liquid, the pressure detected in a state in which the volume change has becomes zero.