Auto-return function for a bulldozer ripper
September 5, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAutomatic control for ripper tool Automatic implement position control system Pivotal movement control device for boom-equipped working machine Method of automatically controlling impact ripper High voltage ripping apparatus Automatic tip angle control Automatic lift and tip coordination control system and method of using same Patent #: 5467829 InventorsAssigneeApplicationNo. 708518 filed on 09/05/1996US Classes:172/2, AUTOMATIC POWER CONTROL172/699SubsoilersExaminersPrimary: Melius, Terry LeeAssistant: Pezzuto, Robert E. Attorney, Agent or FirmInternational ClassA01B 063/111AbstractAn apparatus controls the movement of a ripper for a machine. Tilt and lift cylinders controllably actuate the ripper. Hydraulic control valves control the flow of hydraulic fluid to the respective cylinder. An auto-return button produces an auto-return signal in response to being depressed by the machine operator. A controller receives the auto-return signal and delivers a ripper control signal to the hydraulic control valves to automatically raise the ripper to a predetermined position.Field of SearchAUTOMATIC POWER CONTROLConstant depth type Land leveller type Electrical Draft responsive With deflector or shield for thrown material MAST TYPE HITCH (E.G., THREE POINT HITCH, ETC.) Subsoilers Including specific hydraulic control system to position implement Condition responsive VEHICLE-CARRIED BALE ACCUMULATOR Pivot carried by arm turning about fixed second pivot Carrier or mover includes means enabling additional movement of a rectilinear nature in a direction other than vertical Control means responsive to sensed condition Includes means on or linked with transporting vehicle for forming and discharging stack | |
