Patents Assigned to Trak International, Inc.
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Patent number: 5813697Abstract: Disclosed herein is a vehicle including a frame, and a stabilizer apparatus including a pressure source, first and second fluid-actuated stabilizer assemblies connected respectively to the front and rear axles shiftably moveable on the frame, one of the first and second stabilizer assemblies normally being locked against extension and contraction in the absence of pressurization thereof by the pressure source, and the other of the first and second stabilizer assemblies normally being free to extend and contract in the absence of pressurization thereof by the pressure source, hydraulic circuit connected between the pressure source and the first and second fluid activated stabilizer assemblies and including flow controller operable between a first mode wherein the pressure source is disconnected from the first and second stabilizer assemblies, whereby the one of the stabilizer assemblies is locked against extension and retraction, thereby locking the axle connected thereto against shifting movement relative toType: GrantFiled: March 3, 1997Date of Patent: September 29, 1998Assignee: Trak International, Inc.Inventors: J. Scott Bargenquast, Terry A. Weber, John R. Plate
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Patent number: 5639119Abstract: Disclosed herein is a vehicle including a frame, and a stabilizer apparatus including a pressure source, first and second fluid-actuated stabilizer assemblies connected respectively to the front and rear axles shiftably moveable on the frame, one of the first and second stabilizer assemblies normally being locked against extension and contraction in the absence of pressurization thereof by the pressure source, and the other of the first and second stabilizer assemblies normally being free to extend and contract in the absence of pressurization thereof by the pressure source, a hydraulic circuit connected between the pressure source and the first and second fluid activated stabilizer assemblies and including a flow controller operable between a first mode wherein the pressure source is disconnected from the first and second stabilizer assemblies, whereby the one of the stabilizer assemblies is locked against extension and retraction, thereby locking the axle connected thereto against shifting movement relativeType: GrantFiled: December 5, 1994Date of Patent: June 17, 1997Assignee: Trak International, Inc.Inventors: John R. Plate, J. Scott Bargenquast, Terry A. Weber
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Patent number: 5230399Abstract: A vehicle having at least four wheels comprising a pair of front wheels and a pair of rear wheels, first and second reversible hydraulic cylinders coupled respectively to the front wheels for turning the same and third and fourth hydraulic cylinders coupled respectively to the rear wheels for turning the same, a hydraulic pressure source, a hydraulic circuit for selectively coupling each of the cylinders to the hydraulic pressure source for simultaneously turning the front and rear wheels whereby the vehicle may be turned in either a right-hand or a left-hand direction.Type: GrantFiled: November 21, 1991Date of Patent: July 27, 1993Assignee: Trak International, Inc.Inventor: John R. Plate
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Patent number: 5052532Abstract: A brake system for a vehicle includes a pump coupled to a service brake through a brake pedal valve and to a parking brake by a four-way solenoid valve which also couples the pump to a transmission disconnect valve. Activation of the solenoid valve couples the parking brake to the pump for placing the parking brake in an off mode and actuates the transmission disconnect valve to couple a transmission pump to a transmission valve. Deactivation of the solenoid valve disconnects the parking brake and operates the transmission disconnect valve to disconnect the transmission so that the vehicle cannot be driven when the parking brake is on. A check valve connects the parking brake to the brake pedal valve so that the service brake can be operated when the pump is deactivated.Type: GrantFiled: May 29, 1990Date of Patent: October 1, 1991Assignee: Trak International, Inc.Inventor: John R. Plate
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Patent number: 4955452Abstract: A locking apparatus for a skid steer loader which is operable to secure the wheels against movement, the locking apparatus including a support tube disposed in substantially coaxial alignment with an aperture formed in a drive sprocket, a locking member slideably housed in the support tube and reciprocally moveable between a retracted position and a locking position, a pair of biasing springs individually housed in the support tube and positioned on opposite ends of the locking member; and a control cable for urging the locking member into the locking position.Type: GrantFiled: April 20, 1989Date of Patent: September 11, 1990Assignee: Trak International, Inc.Inventor: John C. Simonz