Locks – Special application – For automotive vehicles
Patent
1983-09-28
1986-01-07
Wolfe, Robert L.
Locks
Special application
For automotive vehicles
70264, B60R 2502
Patent
active
045627100
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a National Phase Application of PCT/EP83/00017 filed Jan. 25, 1983 and based, in turn, upon a French National application No. 82 01310 filed Jan. 28, 1982 under the International Convention.
FIELD OF THE INVENTION
The invention relates to a security device for motor vechicles which blocks the steering.
BACKGROUND OF THE INVENTION
A steering wheel lock which blocks the steering is a common and efficient device to prevent unauthorized use of a motor vehicle. The known steering wheel locks are mechanical devices attached to the steering column and secure the steering wheel.
These known devices have a number of disadvantages in spite of their effectiveness. They are not self-positioning and a turning of the wheel is necessary to lock the steering. The release of the steering lock generally requires considerable effort. The steering lock is easily accessible when the vechicle is open. The position of the steering wheel lock on the steering column is not favorable as concerns comfort, safety, appearance and even legal regulations.
OBJECT OF THE INVENTION
The object of the invention is to eliminate these disadvantages of known steering wheel locks.
SUMMARY OF THE INVENTION
In accordance with the invention this object is attained with a security device for locking a steering mechanism of a vehicle which includes a device for closing the inlet opening of a hydraulic cylinder whose piston rod is connected to a component of the steering mechanism.
In the case of motor vehicles provided with hydraulically assisted steering the cylinder thereof is the mentioned hydraulic cylinder which is blocked.
The invention is further clarified with the aid of the drawing, which:
FIG. 1 is a schematic representation of an embodiment of the security device installed in a vehicle with hydraulically assisted steering and showing the hydraulic means in diagrammatic section;
FIGS. 2-4 are diagrammatic elevational and sectional views of a variety of actuating devices for the security device shown in FIG. 1.
SPECIFIC DESCRIPTION
The hydraulic assistance of the steering of the vehicle is effected by means of a hydraulic cylinder 1 whose piston rod 2 has a rack which cooperates with the pinion 3. The pinion 3 controls a distributor 4 connected with a pump 5 and a container 6. The ends of the piston rod 2 cooperate with the links 7 of the steering mechanism. The piston 25 of the hydraulic cylinder 1 divides said cylinder into two compartments, which are connected with two outlets of the distributor 4 via the left inlet opening 19 and the right inlet opening 20.
According to the invention the two openings 19 and 20 can be closed whereby the piston 25 and the piston rod 2 are stopped thereby blocking the links 7. If the vehicle is not provided with hydraulic steering assistance a simple hydraulic device can be provided which consists of a hydraulic cylinder 1 having a piston rod 2 directly connected to the steering.
In the described embodiment, the inlet openings 19, 20 are hydraulically closed. For this purpose the device has a sliding plug 8 with three pistons 9, 10, 11 mounted on a common piston rod 16 and connected with a nut 12. In the operational position shown in the drawing the pistons 9 and 10 do not close any of the openings 19 and 20 and the hydraulic cylinder 1 is normally supplied through openings 21 and 23. For safety reasons, the piston 11 is meant either to interrupt the fuel supply to the engine or to open or close the ignition current circuit in such a manner as to prevent the steering from being blocked while the engine still runs.
The nut 12 cooperates with a spindle 13 driven by an electromotor 14; The ensemble is mounted in a housing 15. The end of the piston rod 16 holds the housing 15 in rest position. The motor 14 is turned on and off by an electric key switch 17 to which it is connected via an armored cable 18. when the switch 17 is turned in the OFF-position and the key is pulled out the motor 14 is turned on and produces a linear motion of t
REFERENCES:
patent: 2695685 (1954-11-01), Jamison
patent: 2802674 (1957-08-01), Jackson
patent: 3515442 (1970-06-01), Whittemore
patent: 3550717 (1970-12-01), Doty, Jr.
patent: 4119171 (1978-10-01), Remontet
patent: 4146244 (1979-03-01), Presley
patent: 4175635 (1979-11-01), Thomas
patent: 4273027 (1981-06-01), Reinhard et al.
patent: 4418779 (1983-12-01), Nakayama et al.
"Power Steering System Varies Assistance with Speed", Nishikawa et al., Automotive Engineering, Jul. 1979, pp. 70-72.
Dubno Herbert
Neiman S.A.
Ross Karl F.
Wolfe Robert L.
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