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:
Sep. 15, 1998
Filed:
Dec. 01, 1995
George Kadlicko, Mississauga, CA;
Microhydraulics Inc., Ontario, CA;
Abstract
A hydraulic valve includes a spool movable within a body to regulate flow across the valve. Movement of the spool is controlled by an electromagnetic actuator that operates either directly or through a pilot stage upon the spool. When operating through a pilot stage, the actuator varies pilot pressure by an operating member co-operating with an orifice. A flapper valve may be used to vary a pair of pilot flows in complementary manner. Feedback signals of pressure and spool position are provided to a controller which selectively combines the signals to monitor the operating parameters of the valve. The controller may modify the position signal with the pressure signal to obtain an indication of flow rate through the valve.