Motor vehicles – Steering by driving – Independently operable drive motors
Reexamination Certificate
2007-12-11
2007-12-11
Hurley, Kevin (Department: 3611)
Motor vehicles
Steering by driving
Independently operable drive motors
C180S307000, C180S336000
Reexamination Certificate
active
11188293
ABSTRACT:
A tractor has hydraulically driven wheels at a cab end and castor wheels at an engine end. It can be driven cab forward in a working mode with a header on the forward end. It is rotated to engine forward in the transport position for more stable higher speed travel. The driven wheels are driven by hydraulic motors each having their own drive pump the output of which is controlled by a cam plate. The speed control is effected by a manually operable lever through a servo-cylinder which locates a speed control arm moving both cam plates to the set position. In a maximum speed position both cam plates are engaged against a stop. The steering is effected by moving the cam plates differentially to drive the wheels at different speeds. The piston rod of the servo-cylinder includes a spring relief so that the speed control arm can back off from the maximum position by moving the servo-cylinder body when steering in the maximum speed position.
REFERENCES:
patent: 4281737 (1981-08-01), Molzahn
patent: 5383528 (1995-01-01), Nicol
patent: 5649606 (1997-07-01), Bebernes et al.
patent: 6036597 (2000-03-01), Arner
patent: 6397966 (2002-06-01), Irikura et al.
patent: 6629577 (2003-10-01), Abend et al.
patent: 6755264 (2004-06-01), Hasegawa et al.
patent: 7040425 (2006-05-01), Hammonds
patent: 7059433 (2006-06-01), Hasegawa et al.
patent: 7077220 (2006-07-01), Dunn et al.
patent: 2220856 (2004-01-01), None
patent: 1614947 (1990-12-01), None
Battison Adrian D.
Dupuis Ryan W.
Hurley Kevin
MacDon Industries Ltd.
Williams Michael R.
LandOfFree
Tractor with hydraulic speed and steering control for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tractor with hydraulic speed and steering control for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tractor with hydraulic speed and steering control for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3883170