Flynn, Thiel, Boutell & Tanis, P.C.
Two wheel/four wheel drive shifting device including an indicator
 A two/four wheel drive shifting device capable of detecting a success or failure in shifting of a free wheel mechanism to a locked state without encumbering components for detecting free and locked states of the free wheel mechanism being directly disposed in the free wheel mechanism. The two/four wheel drive shifting device has a two/four wheel drive shifting mechanism disposed in a transfer mechanism, a device for detecting shifting between two wheel and four wheel drive, an indicator for showing the shifting, an actuator for shifting a free wheel mechanism which is disposed in either a front wheel or a rear wheel differential mechanism, a pressure pump for supplying working pressure, a pressure detector for detecting the working pressure, and a control to actuate the pressure pump to supply working pressure to the actuator when shifting to four wheel drive is successful. The control also deactivates the pressure pump and actuates the indicator in order to show a successful shifting to four wheel drive when the working pressure has achieved a predetermined pressure. 
Suzuki Motor Corporation
B B
B60K B60K
additional inventional
Hiroaki
Yamada