Accelerator linkage lock

Claim 2

In a vehicle, a source of fluid under pressure, a brake valve for passing pressure fluid from the source to operate a brake stopping the vehicle, a speed-control member for an engine driving the vehicle, means for holding the speed-control member in a predetermined position, a manual valve independent of the brake valve for actuating the holding means by pressure fluid from the source and for releasing the holding means, and a release valve connected between the brake valve and the brake for releasing the holding means in response to passage of pressure fluid from the source through the brake valve.

Claim 3

In an automatic vehicle, a fluid motor operatively connected to apply a brake for stopping the vehicle, a source of fluid under pressure, a brake valve, and operating member for the brake valve adapted to make it pass pressure fluid from the source to the fluid motor for applying the brake, a control member whose position determines the speed of an engine driving the vehicle, means for holding the control member in a predetermined position, a manual valve operated independently of the brake valve and its operating member for actuating the holding means by pressure fluid from the source, and a release valve operated by pressure fluid from the source in response to passage of pressure fluid from the source to the fluid motor for releasing the holding means.

Claim 4

In an automatic vehicle, a fluid motor operatively connected to apply a brake for stopping the vehicle, a source of fluid under pressure, a brake valve, and operating member for the brake valve adapted to make it pass pressure fluid from the source to the fluid motor for applying the brake, a control member whose position determines the speed of an engine driving the vehicle, means for holding the control member in a predetermined position, a manual valve operated independently of the brake valve and its operating member for actuating the holding means by pressure fluid from the source, and a release valve operated by pressure fluid from the source in response to passage of pressure fluid from the source to the fluid motor for releasing the holding means.

Claim 5

In a vehicle, a brake for stopping the vehicle, a source of fluid under pressure, a fluid motor for applying a brake to stop the vehicle, a line leading from the source to the fluid motor, a brake valve in the line for passing pressure fluid through the line to the fluid motor for applying the brake, a speed-control member for an engine driving the vehicle, means for holding the speed-control member in a predetermined position, a manual valve for admitting pressure fluid from the source to the holding means independently of the brake valve to actuate the holding means, and a release valve connected to the line between the brake valve and the fluid motor for releasing the holding means in response to opening of the brake valve and passage of pressure fluid from the source through the valve and the line to the fluid motor.

Claim 6

In a vehicle, a brake for stopping the vehicle, a source of fluid under pressure, a fluid motor for applying a brake to stop the vehicle, a line leading from the source to the fluid motor, a brake valve in the line for passing pressure fluid through the line to the fluid motor for applying the brake, a speed-control member for an engine driving the vehicle, means for holding the speed-control member in a predetermined position, a manual valve for admitting pressure fluid from the source to the holding means independently of the brake valve to actuate the holding means, and a release valve connected to the line between the brake valve and the fluid motor for releasing the holding means in response to opening of the brake valve and passage of pressure fluid from the source through the valve and the line to the fluid motor.

Claim 7

In an automatic vehicle, a control member whose position determines the speed of an engine for driving the vehicle, a fluid motor operatively connected to apply a brake stopping the vehicle, a source of fluid under pressure, a first line for supplying fluid under pressure from the source to the fluid motor, a first valve connected in the line, a brake member for operating the valve, means for holding the control member in a predetermined position, a second line connecting the source and the holding means independently of the brake member and the first valve, a second valve in the second line for admitting fluid under pressure from the source through the second line to the holding means to apply the same, a third valve connected in the second line between the second valve and the holding means, and a third line connecting the third valve and the first line between the first valve the fluid motor for causing actuation of the brake member and the resultant flow of fluid in the first line for the first valve to the fluid motor to open the third valve and thereby to release the holding means.

Claim 8

In an automatic vehicle, a control member whose position determines the speed of an engine for driving the vehicle, a fluid motor operatively connected to apply a brake stopping the vehicle, a source of fluid under pressure, a first line for supplying fluid under pressure from the source to the fluid motor, a first valve connected in the line, a brake member for operating the valve, means for holding the control member in a predetermined position, a second line connecting the source and the holding means independently of the brake member and the first valve, a second valve in the second line for admitting fluid under pressure from the source through the second line to the holding means to apply the same, a third valve connected in the second line between the second valve and the holding means, and a third line connecting the third valve and the first line between the first valve the fluid motor for causing actuation of the brake member and the resultant flow of fluid in the first line for the first valve to the fluid motor to open the third valve and thereby to release the holding means.

Claim 9

In a vehicle, a source of gas under pressure, means for utilizing gas from said source to operate a brake stopping the vehicle, a speed-control member for an engine driving the vehicle, means for holding the speed-control member, means operated independently of the brake and the means operating the brake, on gas from the source to actuate the holding means, and means operated on gas received from the source by way of the operating means for the brake to release the holding means in response to operatioN of the brake.

Claim 10

In a vehicle, a source of gas under pressure, means for utilizing gas from said source to operate a brake stopping the vehicle, a speed-control member for an engine driving the vehicle, means for holding the speed-control member, means operated independently of the brake and the means operating the brake, on gas from the source to actuate the holding means, and means operated on gas received from the source by way of the operating means for the brake to release the holding means in response to operatioN of the brake.

Claim 11

In a vehicle, an airbrake pressure source, a brake member for operating from the source a brake stopping the vehicle, a speed-control member for the vehicle, means for holding the speed-control member in a fixed position, means utilizing gas from the pressure source independently of the operation of the brake means to actuate the holding means, and means utilizing gas from the pressure source by way of the brake member to make the holding means release the speed-control member in response to operation of the brake.

Claim 12

In a vehicle, an airbrake pressure source, a brake member for operating from the source a brake stopping the vehicle, a speed-control member for the vehicle, means for holding the speed-control member in a fixed position, means utilizing gas from the pressure source independently of the operation of the brake means to actuate the holding means, and means utilizing gas from the pressure source by way of the brake member to make the holding means release the speed-control member in response to operation of the brake.

Claim 13

In an engine-powered vehicle having an airbrake system: an airbrake tank for the compressed air of the system; brake cylinder means in the system for power engagement and release of the airbrake; lockable accelerator linkage means (124) for establishing and for adjusting engine power; second cylinder means (127) for selectively locking and unlocking the linkage; pressure-operated valve means (128) connected to the second cylinder means for selectively charging and venting same to do the locking and unlocking aforesaid; first conduit means (140) pneumatically disposed between the tank and each of the brake cylinder means and pressure-operated valve means, and having individual branches (138, 139) to the latter two to initiate airflow to engage the brakes and to unlock the linkage at once; and second conduit means (129) pneumatically disposed between the tank and pressure-operated valve means, the latter including one-way flow means (128a) leading to the second cylinder means to open up airflow thereto and reseat, locking the linkage.

Claim 14

In an engine-powered vehicle having an airbrake system: an airbrake tank for the compressed air of the system; brake cylinder means in the system for power engagement and release of the airbrake; lockable accelerator linkage means (124) for establishing and for adjusting engine power; second cylinder means (127) for selectively locking and unlocking the linkage; pressure-operated valve means (128) connected to the second cylinder means for selectively charging and venting same to do the locking and unlocking aforesaid; first conduit means (140) pneumatically disposed between the tank and each of the brake cylinder means and pressure-operated valve means, and having individual branches (138, 139) to the latter two to initiate airflow to engage the brakes and to unlock the linkage at once; and second conduit means (129) pneumatically disposed between the tank and pressure-operated valve means, the latter including one-way flow means (128a) leading to the second cylinder means to open up airflow thereto and reseat, locking the linkage.

Claim 15

The invention of claim 7, characterized by an operator-operated valve (130) connected in the second conduit means to control the locking aforesaid.

Claim 16

The invention of claim 7, characterized by a first operator-operated valve (134) connected in the first conduit means for admitting air to the two branches; and a second operator-operated valve in the second conduit means for admitting air to the one-way flow means.

Claim 17

The invention of claim 9, further characterized by a handle (141) connected to the second operator-operated valve.

Claim 18

The invention of claim 9, further characterized by a brake pedal (133) connected to the first operator-operated valve; and an accelerator pedal (119) connected to the accelerator linkage means.

Claim 19

The invention of claim 9, further characterized by a brake pedal (133) connected to the first operator-operated valve; and a handle (141) connected to the second operator-operated valve.