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. 06, 2005
Filed:
Jan. 13, 2004
Dumitru Puiu, Sterling Heights, MI (US);
Dumitru Puiu, Sterling Heights, MI (US);
Magna Drivetrain of America, Inc., Troy, MI (US);
Abstract
A hydraulic coupling having a multi-plate friction clutch assembly operably connecting a pair of rotary members and a hydramechanical clutch actuator for automatically controlling engagement of the friction clutch assembly. The clutch actuator includes a hydraulic fluid pump, a hydraulically-actuated rotary operator, and a ball ramp mechanism. The hydraulic fluid pump is operable to draw low pressure fluid from a sump and deliver high pressure fluid to a series of actuation chambers defined between coaxially aligned first and second components of the rotary operator. The magnitude of the fluid pressure delivered to the actuation chamber controls the angular movement of the second component relative to the first component. Translational movement of the second cam member results in a compressive clutch engagement force being exerted on the friction clutch assembly, thereby controlling the drive torque transferred from the first rotary member to the second rotary member.