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. 19, 1985
Filed:
Oct. 05, 1982
Theodorus P Cadee, Goirle, NL;
Van Doorne's Transmissie B.V., Tilburg, NL;
Abstract
In apparatus for controlling the transmission ratio of an infinitely variable V-belt transmission of the kind including a fluid control valve which supplies fluid to and relieves fluid from a cylinder space the volume of which controls the transmission ratio by adjusting the axial position of a first conical sheave portion relative to a second conical sheave portion, the valve including a valve housing and an internal axially displaceable valve body, the improvement which includes an electromagnet having a displaceable armature and a winding which upon electrical energization produces a displacing force on the armature; a spring connected between the armature and the axially displaceable valve body, the arrangement being such that a displacing force on the armature produced by energization of the electromagnet produces a displacing force, via the spring on the valve body in a first direction; and a fluid connection device controlled by the position of the armature for supplying fluid pressure to the valve body to effect a displacing force thereon in a direction opposite to the first direction such that the valve body is displaced in such opposite direction to a position in which the displacing forces on the valve body are balanced.