Vehicle antitheft device

Claim 2

A control valve comprising: a. a housing having a bore therein; b. at least an inlet and outlet port in said housing communicating with said bore; c. valve means slidable within said bore between a first position clear of said inlet and outlet ports and a second position between said inlet and outlet port; d. means for moving said vaLve means from said first position to said second position; e. holding means for holding said valve means in said closed position; said valve means including unidirectional flow means operable to allow pressure flow from said inlet port to said outlet port, buT to prevent reverse pressure flow from said outlet to said inlet port when said valve means is in a second position.

Claim 3

A control valve as defined in claim 1 wherein said valve means including said unidirectional flow means comprises a valve body slidable within said bore and a valve head connected axially to said valve body for relative limited movement therewith and resilient means between said valve head and said valve body urging said valve head away axially from said body.

Claim 4

a valve head portion connected thereto for engagement with said valve seat; and

Claim 5

a valve head portion connected thereto for engagement with said valve seat; and

Claim 6

first resilient means biased between said body portion and said head urging the head away axially relative to said body for limited movement; e. first and second solenoid means spaced apart axially with said first solenoid means being located between said valve seat and the second solenoid means; f. means for alternatively energizing said first and second solenoid means; whereby when said first solenoid is energized, said valve body will be moved into a position such that the valve head is resiliently urged onto said valve seat whereby said pressure fluid in the direction of said outlet port from said inlet port will overcome the resilient means to open fluid pressure communication, but fluid pressure in the direction of said inlet port from said outlet port will be interrupted by said valve head engaging said valve seat, and whereby when said second solenoid is energized, said valve body will move axially away from said valve seat disengaging said valve head from said valve seat and unopposed to the fluid pressure communication between said inlet and outlet ports.

Claim 7

first resilient means biased between said body portion and said head urging the head away axially relative to said body for limited movement; e. first and second solenoid means spaced apart axially with said first solenoid means being located between said valve seat and the second solenoid means; f. means for alternatively energizing said first and second solenoid means; whereby when said first solenoid is energized, said valve body will be moved into a position such that the valve head is resiliently urged onto said valve seat whereby said pressure fluid in the direction of said outlet port from said inlet port will overcome the resilient means to open fluid pressure communication, but fluid pressure in the direction of said inlet port from said outlet port will be interrupted by said valve head engaging said valve seat, and whereby when said second solenoid is energized, said valve body will move axially away from said valve seat disengaging said valve head from said valve seat and unopposed to the fluid pressure communication between said inlet and outlet ports.

Claim 8

A control valve as defined in claim 1 wherein said inlet port is located axially with respect to said bore, said outlet port is at a right angle to the axis of said bore; a valve seat is provided in said housing between said inlet port and said outlet port for cooperation with said valve means.

Claim 9

A control valve as defined in claim 3 wherein said valve means including unidirectional flow means includes a valve body slidable within said bore and a valve head connected thereto for limited relative movement, and resilient means between said valve head and said valve body urging said valve head away axially from said body, whereby said valve head engages said valve seat, when said valve means are in said second position and whereby the pressure flow from said inlet port will overcome the resilient means forcing the valve head towards the valve body to allow flow from said inlet to said outlet port, but fluid pressure in the direction of said inlet port from said outlet port will be interrupted by said valve head engaging said valve seat, under the force of said resilient means.

Claim 10

A control valve as defined in claim 1 wherein the means for moving said valve means from said first position to said second position comprises a solenoid concentric with the bore of said housing and whereby a portion of said valve body is of a magnetic bearing material.

Claim 11

A control valve as defined in claim 5 whereby a pair of solenoid coils are provided concentric with said bore, whereby when the first solenoid is energized, the valve means will move from said first position to said second position and alternatively when the second solenoid is energized, the valve means will move from said second position to said first position.

Claim 12

A control valve as defined in claim 1 wherein the holding means comprises a pair of balls diametrically sandwiching a compression spring in a diametrically extending aperture in the valve body, whereby the balls are urged against the walls of the said bore.

Claim 13

A control valve as defined in claim 6 whereby means are provided for energizing each solenoid and said means includes means for supplying a current, means for directing said current alternately to one coil or the other momentarily.

Claim 14

A locking device for an automobile, valve means associated with the hydraulic braking system which includes a master cylinder and conduits leading from the master cylinder to a predetermined set of brakes on the automobile, said control valve means interrupting said conduit, including a housing having a bore therein, at least an inlet and an outlet port in said housing communicating with said bore; valve means slidable within said bore between a first position clear of said inlet and outlet ports and a second position between said inlet and outlet ports, means for moving said valve means from said first position to said second position, holding means for holding said valve means in said closed position, said valve means including unidirectional flow means operable to allow pressure flow from said inlet port to said outlet port, but to prevent reverse pressure flow from said outlet port, when said valve means is in a second position.

Claim 15

A locking device for an automobile, valve means associated with the hydraulic braking system which includes a master cylinder and conduits leading from the master cylinder to a predetermined set of brakes on the automobile, said control valve means interrupting said conduit, including a housing having a bore therein, at least an inlet and an outlet port in said housing communicating with said bore; valve means slidable within said bore between a first position clear of said inlet and outlet ports and a second position between said inlet and outlet ports, means for moving said valve means from said first position to said second position, holding means for holding said valve means in said closed position, said valve means including unidirectional flow means operable to allow pressure flow from said inlet port to said outlet port, but to prevent reverse pressure flow from said outlet port, when said valve means is in a second position.

Claim 16

A locking device for an automobile as defined in claim 9 wherein a further locking unit is provided which cooperates with the hood and includes a housing, ram means slidable within the housing and adapted for movement between a first position retracted within the housing and a second position protruding from said housing and engaging the hood.

Claim 17

A loCking unit, as defined in claim 10 wherein means for moving the ram means from a first position to a second position includes a solenoid, and a portion of said ram means is of magnetic bearing material.

Claim 18

A control valve comprising: a. a housing having a bore therein; b. inlet and outlet ports in said housing communicating with said bore; c. a valve seat in said housing intermediate said inlet and outlet ports; d. first valve means including:

Claim 19

A control valve comprising: a. a housing having a bore therein; b. inlet and outlet ports in said housing communicating with said bore; c. a valve seat in said housing intermediate said inlet and outlet ports; d. first valve means including:

Claim 20

In a locking device for an automobile, valve means associated with the hydraulic braking system including a master cylinder and conduits leading from said master cylinder to a predetermined set of brakes of the automobile, said valve means interrupting said conduit and including a housing having a bore, an inlet port in said housing connected to the conduit portion, leading from said master cylinder and an outlet port in said housing connected to the conduit leading to the set of brakes, the inlet and outlet ports communicating with the bore, a valve seat within the housing and between the inlet and outlet port, a solenoid-operated plunger movable axially with the bore towards and from the valve seat; a valve head connected to said plunger and adapted for limited axial movement relative thereto; resilient means biasing said head away from said plunger; solenoid-energizing switch means for actuating said solenoid-operated plunger to slide to a position whereby said valve head engages said valve seat, whereby fluid pressure from said master cylinder to said brakes through said inlet overcomes the force of said resilient means disengaging said valve head from the valve seat and moving the valve head inwardly relative to the plunger permitting the flow of pressure fluid to the brakes, but whereby the valve head is resiliently forced back into engagement with the valve seat when the fluid pressure from the master cylinder is reduced, thus interrupting the fluid pressure flow from the brakes returning to the master cylinder through the outlet port, thus retaining fluid pressure on the brakes and preventing movement of the automobile until said solenoid-energizing switch operates to retract the solenoid-operated plunger.

Claim 21

In a locking device for an automobile, valve means associated with the hydraulic braking system including a master cylinder and conduits leading from said master cylinder to a predetermined set of brakes of the automobile, said valve means interrupting said conduit and including a housing having a bore, an inlet port in said housing connected to the conduit portion, leading from said master cylinder and an outlet port in said housing connected to the conduit leading to the set of brakes, the inlet and outlet ports communicating with the bore, a valve seat within the housing and between the inlet and outlet port, a solenoid-operated plunger movable axially with the bore towards and from the valve seat; a valve head connected to said plunger and adapted for limited axial movement relative thereto; resilient means biasing said head away from said plunger; solenoid-energizing switch means for actuating said solenoid-operated plunger to slide to a position whereby said valve head engages said valve seat, whereby fluid pressure from said master cylinder to said brakes through said inlet overcomes the force of said resilient means disengaging said valve head from the valve seat and moving the valve head inwardly relative to the plunger permitting the flow of pressure fluid to the brakes, but whereby the valve head is resiliently forced back into engagement with the valve seat when the fluid pressure from the master cylinder is reduced, thus interrupting the fluid pressure flow from the brakes returning to the master cylinder through the outlet port, thus retaining fluid pressure on the brakes and preventing movement of the automobile until said solenoid-energizing switch operates to retract the solenoid-operated plunger.