Patent ID: 6840279
Filing Date: 2005-01-11
Classification: B60G,Y10S,Y10T

Abstract:
1. A pneumatic switching valve for systems for lifting and lowering the body of a vehicle including air suspension, comprising: a mechanical actuation element being designed and arranged to adjust a lifting position, a lowering position, a driving position and a stop position; at least one inlet valve having an axis and including a valve body, a tappet and a closing spring, said inlet valve axis extending beyond said inlet valve; at least one outlet valve having an axis and including a valve body, a tappet and a closing spring, said outlet valve axis extending beyond said outlet valve, said inlet valve and said outlet valve being arranged in one common plane and to face in opposite directions, said closing springs of said inlet valve and of said outlet valve being designed and arranged to move said actuation element from the lifting position and from the lowering position to the stop position when releasing said actuation element; at least one locking valve including a valve body and a tappet; and a control piston, said control piston having an axis perpendicular to and spaced apart from the axes of said inlet valve and of said outlet valve to form a distance, said control piston including a plurality of cam surfaces being designed and arranged to actuate said valve bodies of said inlet valve, said outlet valve and said locking valve, each of said cam surfaces and said distance forming a lever arm for transmitting a sufficient return force and a return torque from said closing springs of said inlet valve and of said outlet valve to said control piston to move the actuation element, said control piston being designed and arranged to be subjected to compressed air to move said switching valve from the stop position to the driving position, said control piston being designed and arranged to be rotated from the stop position to the lifting position or to the lowering position.