Regulating apparatus for a fluid controlled car suspension

Claim 2

Regulating apparatus for a fluid controlled car suspension, comprising resilient supporting leg means including a cylinder, and a movable piston forming a working chamber in said cylinder, and having a normal position in which the car is at a normal level; and electric motor, and a pump driven by said motor to produce a pressure liquid; a low pressure discharge space; conduit means connecting said pump and said discharge space with said working chamber; regulating means in said conduit means including maximum pressure switch means for disconnecting said motor and stopping said pump when the pressure in said working chamber has compensated an increased load acting on said resilient supporting leg means and the pressure in said conduit means rises to a maximum, an electromagnetic unloading compensating valve for discharge into said discharge space, and a minimum pressure switch closing said unloading compensating valve when the pressure in said working chamber has compensated a reduced load acting on said resilient supporting leg means and the flow out of said working chamber into said discharge space ends; and control switch means for starting said motor located in the circuit of said maximum pressure switch means and of said minimum pressure switch.

Claim 3

Regulating apparatus as claimed in claim 1 wherein said control switch means includes a door switch of a car having the suspension, said door switch being connected with said motor and also adapted to control an electric light for illuminating the interior of the car.

Claim 4

Regulating apparatus as claimed in claim 2 wherein said control switch means includes a manual switch controlled by the driver of the car and being connected with said motor.

Claim 5

Regulating apparatus as claimed in claim 1 wherein said control switch means includes an electric level sensing means responsive to a relative displacement of said cylinder and said piston out of said normal position, and delay means for delaying a response of said level sensing switch.

Claim 6

Regulating apparatus as claimed in claim 1 comprising at least two resilient supporting leg means; and a check valve circuit connecting the conduit means correlated with said two supporting legs means, said check valve circuit including two pairs of check valves disposed in parallel conduit portions, respectively, the check valves of each pair opening in opposite directions.

Claim 7

Regulating apparatus as claimed in claim 1 wherein said regulating means include loading and unloading control valve means responsive to relative displacement of said cylinder and piston to open and permit flow into and out of said working chamber.

Claim 8

Regulating apparatus for a fluid controlled car suspension, comprising resilient supporting leg means including a cylinder and a movable piston forming a working chamber in said cylinder, and having a normal position in which the car is at a normal level; a central source of a liquid under pressure; a low pressure discharge space; conduit means connecting said source and said discharge space with said working chamber; control switch means; and regulating means in said conduit means including an electromagnetic loading compensating valve opened by said control switch means to connect said source with said working chamber, maximum pressure switch means for closing said loading compensating valve when the pressure in said working chamber has compensated an increased load acting on said resilient supporting leg means, and the pressure in said conduit means rises to a maximum, an electromagnetic unloading compensating valve for discharge into said discharge space, and a minimum pressure switch closing said unloading compensating valve when the pressure in said working chamber has compensated a reduced load acting on said resilient supporting leg means and the flow out of said working chamber into said discharge space ends in said normal position; said control switch means being located in the circuit of said maximum pressure switch means and of said minimum pressure switch.

Claim 9

Regulating apparatus for a fluid controlled car suspension, comprising resilient supporting leg means including a cylinder and a movable piston forming a working chamber in said cylinder, and having a normal position in which the car is at a normal level; a central source of a liquid under pressure; a low pressure discharge space; conduit means connecting said source and said discharge space with said working chamber; control switch means; and regulating means in said conduit means including an electromagnetic loading compensating valve opened by said control switch means to connect said source with said working chamber, maximum pressure switch means for closing said loading compensating valve when the pressure in said working chamber has compensated an increased load acting on said resilient supporting leg means, and the pressure in said conduit means rises to a maximum, an electromagnetic unloading compensating valve for discharge into said discharge space, and a minimum pressure switch closing said unloading compensating valve when the pressure in said working chamber has compensated a reduced load acting on said resilient supporting leg means and the flow out of said working chamber into said discharge space ends in said normal position; said control switch means being located in the circuit of said maximum pressure switch means and of said minimum pressure switch.

Claim 10

Regulating apparatus as claimed in claim 7 wherein said control switch means includes a door switch of the car having the suspension, said door switch being connected with said electromagnetic loading regulating valve, and also adapted to control an electric light for illuminating the interior of the car.

Claim 11

Regulating apparatus as claimed in claim 7 wherein said control switch means includes a manual switch operable by the driver of the car and connected with said electromagnetic loading compensating valve.

Claim 12

Regulating apparatus as claimed in claim 7 wherein said control switch means includes an electric level sensing means responsive to relative displacement of said cylinder and piston out of said normal position, and delay means for delaying a response of said level sensing switch means.

Claim 13

Regulating apparatus as claimed in claim 7 comprising at least two resilient supporting leg means; and a check valve circuit connecting the conduit means correlated with said two supporting leg means, said check valve circuit including two pairs of check valves disposed in parallel conduit portions, respectively, the check valves of each pair opening in opposite directions.

Claim 14

Regulating apparating as claimed in claim 1 wherein said regulating means include loading and unloading control valve means responsive to relative displacement of said cylinder and piston to open and permit flow into and out of said working chamber.