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:
Dec. 03, 1991
Filed:
Jun. 07, 1990
Thomas J Stobbs, West Allis, WI (US);
Kishor J Patel, Mukwonago, WI (US);
Applied Power Inc., Butler, WI (US);
Abstract
A two-stage, proportional pressure control valve is disclosed which may be used for uni-directional fluid flow. A poppet is movably positioned within a body of the valve. Pressure forces acting on the poppet affect the position of the poppet and thus the magnitude of fluid flow through the valve. A control pressure chamber is defined by the poppet and an orifice plate. The orifice plate includes an passage which may be blocked by an armature. An electromagnetic driver produces a magnetic flux path that is substantially proportional to a variable input current. The electromagnetic driver is operable to move the armature and thereby allow fluid in the control pressure chamber to exit through the passage. The proportional pressure control valve can be incorporated into a damper of a vehicle suspension system where the input current is governed by an electronic control unit of the vehicle. The electronic control unit may be responsive, in part, to the position of the suspension system through the use of a position feedback sensor.