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. 07, 2000
Filed:
Jun. 30, 1999
Gregory W Hefler, Chillicothe, IL (US);
Brian J Murphy, Morton, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A hydraulically actuated device comprises a device body defining an inlet passage separated from an outlet passage by a first valve seat and a second valve seat, and a control passage that opens into an area between the first valve seat and the second valve seat. An essentially spherical ball valve member having a first radius of curvature is trapped between the first valve seat and the second valve seat. The inlet passage is fluidly isolated from the control passage by the ball valve member when the ball valve member is in contact with the first valve seat, and the outlet passage is fluidly isolated from the control passage by the ball valve member when the ball valve member is in contact with the second valve seat. An electrical actuator is attached to the device body. A pin is movable by operation of the electrical actuator to come into contact with and push against the ball along a curved striking surface of the pin having a second radius of curvature that is larger than the first radius of curvature.