Dip correctors for headlamps of vehicles

Claim 1

Device for correcting the dip of the headlamps of a motor vehicle comprising discrete variable-volume chambers tending to have their maximum volume under the influence of a resilient return member and their minimum volume under the influence of a vacuum, said chambers being juxtaposed to constitute together a bellows with a spring means constantly urging said bellows to its maximum expanded condition and with two compartments forming a first chamber and two further compartments forming a second chamber, the device further comprising a pipe line connected to the induction manifold of the engine of said vehicle, a first and second rotary valve each having a plurality of means for connecting said chambers to different sources of pressure, a pair of pipe lines connecting said two compartments of said first chamber of said bellows with a pair of ports of said first rotary valve, a second pair of pipe lines connecting said two compartments of the second chamber of said bellows to said second rotary valve, each rotary valve movable among positions connecting each port with the atmosphere and said pipe line connected to the induction manifold of the engine, the rotation of said first rotary valve being controlled by said front suspension and the rotation of said second rotary valve being controlled by said rear suspension, and mechanical means connecting the headlamps to said bellows, whereby said bellows is gradually compressed or expanded to produce a discrete variation in the dip of a headlamp attached to the movable end of said bellows.