Agco International Gmbh

Agco Corporation

Klaus Brugger

Hans-Peter Zeiler

Herbert Kerler

Martin Brenninger

Peter Miller

Bernhard Hoeldrich

Josef Ammann

Franz Erhard

Karl Braeckle

Martin Dreier

Christoph Wintergerst

Berhard Hoeldrich

A vehicle brake circuit including a brake actuator, a manually operable valve, an electrically operable valve and a fluid reservoir for the supply of fluid to the actuator. The manually operated valve may be connected to the fluid reservoir either directly or indirectly through the electrically operable valve, when its position blocks a direct fluid connection with the fluid reservoir. The electrically operated valve controls activation or deactivation of the actuator except when the mechanically operated valve is in an unblocked position and overrides the electrically operated valves control of the actuator.

Parking brake

A brake arrangement for a vehicle having a cardan brake and separate left and right brakes. The left brake activated by movement of a first lever and the right brake is activated by movement of a second lever. The left brake, right brake and the cardan brake are activated together by movement of both levers together, characterized in that the cardan brake is connected to a fluid supply in a circuit which comprises a first and a second brake valve arranged in series and the first brake valve is operable by the first lever and the second brake valve is operable by the second lever.

Brake arrangement

A brake and steering arrangement on a tractor comprising a substantially vertically extending structural support column for connection at a lower end to a floor of a tractor cab and carrying means to support a steering wheel at its upper end. A single cylinder is supported within the column. A first braking circuit operates left and right rear brakes and a second braking circuit operates a cardan brake, characterized in that braking circuits are connected to a single cylinder mounted on the steering column in the tractor cab and wherein said steering column comprises a valve unit, so that the brakes are operable by two pedals.

Steering and brake arrangement

A tractor steering and braking arrangement has a substantially vertically extending structural support columnfor connection at a lower endto a floorof a tractor cab and carrying meansto support a steering wheelat its upper end. At least one hydraulic master cylinderfor operation of brakes of the tractor is supported within the column. The master cylinderincludes an operating rodand an associated piston which is moved substantially vertically by an associated brake operating pedal. The pedal is positioned at one side of the structural support columnand supported for pivoting from the column. Where separate left and right brakes are used, separate left and right master cylinders are mounted vertically within the support column. Both pedals are also mounted for pivoting from the column at a positioninside the column.

Steering and brake arrangements

A vehicle power braking system has separate left and right brakes () operable from a source of pressurized fluid () via relay valve means () controlled by separate left and right brake operating pedals () to provide steering assistance during a turn. The relay valve means delivers a brake operating pressure proportional to the depression of the associated brake operating pedal to separate left and right shift valves (), each shift valve being connected with its respective operating pedal () by a respective pilot line () so that when each pedal is operated the associated shift valve is opened by the respective pilot line pressure to supply the proportional pressure from the relay valve means to the respective brake (). The relay valve means comprises a single relay valve () which supplies both shift valves () and the pilot lines () are interconnected via a shuttle valve () so that the highest pilot pressure generated by operating the brake pedals () is applied to the single relay valve () so that each shift valve receives the same brake applying pressure proportional to said highest pilot pressure.

Growing community of inventors

Marktoberdorf, Germany

Klaus Brugger