James Marvin Kilgore, 962308 NE 177Th Ave, Vancouver, WA 98684

5445258, Aug 29, 1995

Feb 22, 1994

8/200181

Jon A. Bigley - Milwaukie OR
Thomas W. Giacomini - Hartland MI
Raymond S. Alvey - Utica MI
Christopher J. Grieco - Farmington Hills MI
Patrick W. Gibson - Northville MI
Dale O. Stollsteimer - W. Bloomfield MI
James C. Kilgore - Detroit MI
Karl W. Wojcik - Sterling Heights MI

Warn Industries, Inc. - Milwaukie OR

F16D 4328
F16D 2512

192 85V

A pulse actuated clutch and control arrangement for coupling and decoupling a drive line of a vehicle relative to a wheel such as when shifting between two-wheel and four-wheel drive modes. The pulse actuated clutch has a coupling member that is permanently engaged with one of a driven member and a driving member. The coupling member is movable in a first direction to engage one of the driven and driving members and is movable in a second direction to engage both the driven and driving members. The coupling member is moved in the second direction by a first pulse of air pressure applied thereto. Formations of the piston assembly and the driven member cooperatively latch the piston in the second position to maintain the coupling member in engagement with both the driven and driving members following first pulse of air pressure. A second, greater magnitude pulse of air pressure moves the primary piston further to unlatch the piston and uncouple the driven member from the driving member. The illustrated control arrangement incorporated into a general purpose control module for a vehicle to accomplish pulse actuated control over the clutch mechanism in coordination with other vehicle control activities.