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:
Aug. 06, 2019
Filed:
Apr. 01, 2016
Punch Powertrain N.v., Sint-Truiden, BE;
Peter Mark Smid, Sint-Truiden, BE;
Stefan Hubertus Godelieve Van Raemdonck, Sint-Truiden, BE;
PUNCH POWERTRAIN N.V., Sint-Truiden, BE;
Abstract
A hydraulic system for a multiple friction transmission, comprising: a first pressure relief valveregulable by means of a first pilot pressure; a normally-open drain valve, which is a directional valve switchable between an open state and a closed state by means of a second pilot pressure; at least one first pressure regulatorfor operating the drain valve by means of a first pilot pressure and a second pilot pressure, respectively; wherein in the event of detrimental hydraulic pressure build up, the second pilot pressure is dropped to open the drain valve, so as to relieve pressure through the drain line.