Abstract: The mower 10 has a rearwardly positioned power unit 11 and a forwardly positioned cutter unit 12 which are pivotably connected together by pivot mount 40. Tandem pumps 24, 25 and 26 are mounted to internal combustion engine 15 and extend parallel to the pivot axis 41 and project into the space above the arc of rotation of the cutter unit 12.

Abstract: A self propelled riding mower includes a power unit (11) that pushes its cutter unit (12), and the units are connected together by an impact resistant pivot connection (25) which permits the cutter unit to pivot with respect to the power unit when travelling over uneven terrain. The pivot connection includes or is supplemented by bumpers (44, 45) carried by one unit in an array about or straddling the pivot bar (40) and pivot tube (58), and a bumper plate or plates (55) carried by the other unit that is or are maintained in sliding relationship with the bumpers.

Abstract: An improved self-leveling vehicle seat mount including a horizontal seat platform for mounting a seat. The mount includes flange members to guide angular rotation and prevent lateral rotation of the seat platform, arcuate channels receive supporting rollers for guiding angular movement of the seat platform, vertical mounting members confronting the flange members for supporting and retaining the seat platform, and a detent for frictionally engaging the flange member to retard the rate of angular displacement in accordance with the weight of the operator of the vehicle.

Abstract: A tractor or similar vehicle which cannot traverse an uphill slope exceeding a certain critical angle of attack. The center of gravity of the vehicle is chosen so that the vehicle is in tipping equilibrium at a certain critical angle of attack which is substantially less than the maximum slope which the vehicle otherwise can climb. A tail plate is mounted behind the rear axle of the vehicle to contact the travel path and limit the maximum amount of tipping, so that the front end of the vehicle can rise no more than a limited amount. A limited extent of tipping thus occurs whenever the vehicle operator attempts to exceed the critical angle of attack, providing a relatively limited and non-violent tipping action which forces the vehicle operator to reduce the angle of attack.

Abstract: A tractor or similar vehicle which cannot traverse an uphill slope exceeding a certain critical angle of attack. The center of gravity of the vehicle is chosen so that the vehicle is in tipping equilibrium at a certain critical angle of attack which is substantially less than the maximum slope which the vehicle otherwise can climb. A tail plate is mounted behind the rear axle of the vehicle to contact the travel path and limit the maximum amount of tipping, so that the front end of the vehicle can rise no more than a limited amount. A limited extent of tipping thus occurs whenever the vehicle operator attempts to exceed the critical angle of attack, providing a relatively limited and non-violent tipping action which forces the vehicle operator to reduce the angle of attack.