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:
Jan. 23, 2001
Filed:
Mar. 16, 1999
Theodore E. Shaffer, Santa Barbara, CA (US);
Murat N. Okcuoglu, Santa Barbara, CA (US);
McLaren Automotive Group, Inc., Livonia, MI (US);
Abstract
A control valve (,) of a hydraulic coupling (,) controls pumping from a casing inlet port (,) by a hydraulic pump (,) through a casing outlet port (,) to control coupling between two rotary members such as by operation of a clutch (,). The casing (,) is connected to one of the rotary members while a pumping component embodied by an impeller (,) is connected to the other rotary member and meshed with an internal ring gear (,) having one more tooth than the number of impeller teeth to provide sufficient pumping capacity so that the pump can act as a brake while still having relatively constant pumping pressure. The control valve (,) includes an elongated valve element (,) mounted within a recess (,) to provide accurate control of its closure when the pumped hydraulic fluid reaches a predetermined pressure corresponding to a predetermined extent of relative rotation between the two drivetrain members.