Clutch-brake steering for small agricultural machines
Patent 4895210 Issued on January 23, 1990. Estimated Expiration Date: 
December 12, 2008. 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.
December 12, 2008. 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 References 2015587 2450749 2461391 2757373 3016957 3679015 3811524 Drive and steering mechanism for a vehicle Power drive rear tine tiller with reversing gear transmission for the tines Brake released clutch mechanism InventorApplicationNo. 282524 filed on 12/12/1988US Classes:172/256, PROPULSION UNIT GUIDED BY WALKING ATTENDANT OR PART OF ARTICULATED VEHICLE172/42, Guided by walking attendant172/125, Tool drive details180/6.2, STEERING BY DRIVING192/12RCLUTCH AND BRAKEExaminersPrimary: Reese, Randolph A.Assistant: Thompson, Jewel V. Attorney, Agent or FirmInternational ClassesA01B 033/08A01B 069/00 AbstractThe type of machine in which the invention finds maximum utility is the self-propelled, user-guided garden machine such as a rotary tiller. A typical machine of that genre has a straight-through axle without a differential and opposite ends of the axle project as right and left shafts to which right and left ground-engaging wheels are respectively affixed. The improvement provided by the present invention resides in right and left clutch-brake units arranged symmetrically at each side of and external to the transmission case. The keys normally fixing the wheels to their shafts are removed and the wheels are instead journalled on the respective shafts and the clutches are alternately engaged and disengaged between the shafts and wheels to facilitate steering of the machine. Each clutching unit includes a brake and controls are provided for effecting braking and clutch disengagement at either side of the machine.Other References
Field of SearchAttendant supported toolGuided by walking attendant With ground support vertically adjustable relative to frame Tool drive details PROPULSION UNIT GUIDED BY WALKING ATTENDANT OR PART OF ARTICULATED VEHICLE WITH DRIVE MEANS FOR TOOL OR CLEANER Driven from rolling or driven ground wheel Belt or chain drive Tool propels implement Rotary driven tool Check of driven member CLUTCH AND BRAKE Peripheral brake STEERING BY DRIVING Combined with manual steering Interlocked With flexible and/or yieldable link | |
