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. 24, 1999
Filed:
Jun. 25, 1997
Theodore E Shaffer, Santa Barbara, CA (US);
Murat N Okcuoglu, Santa Barbara, CA (US);
Asha Corporation, Santa Barbara, CA (US);
Abstract
A vehicle drivetrain differential (22) driven by a rotary drive member (24) rotatively drives a pair of rotary members (26, 28) and includes a housing (30) for containing hydraulic fluid and in which a hydraulic coupling (32) is received. A casing (34) of the hydraulic coupling has a ring gear (44) rotatively driven by the rotary drive member (24). A planetary gear set (36) of the bevel gear type is located within the casing (34) and includes a pair of bevel gears (124, 126) having associated spline connections (128, 130) to the pair of rotary members (26, 28), and the planetary gear set also includes planet gears 132 that revolve with the casing 34 and are meshed with both bevel gears to provide a differential gear action. A fluid inlet 58 and an outlet port 78 of the casing are provided with a gerotor type pump (48) provides pumping of hydraulic fluid into and out of the casing. A control valve (80) opens and closes the outlet port (78) in response to the relative rotation between the pair of rotary members to control operation of the pump as a brake in coupling the pair of rotary members (26, 28) to each other.