US 10,889,322 B2
Oscillation limited driven steering track assembly
Kasandra Coverdale, West Lafayette, IN (US)
Assigned to Terra Drive Systems, Inc., Brookston, IN (US)
Filed by Terra Drive Systems, Inc., Brookston, IN (US)
Filed on Jul. 30, 2018, as Appl. No. 16/49,052.
Prior Publication US 2020/0031391 A1, Jan. 30, 2020
Int. Cl. B62D 11/20 (2006.01); B62D 11/00 (2006.01); B62D 55/14 (2006.01); B62D 55/12 (2006.01); B62D 55/10 (2006.01); B62D 11/24 (2006.01); B62D 11/22 (2006.01)
CPC B62D 11/20 (2013.01) [B62D 11/005 (2013.01); B62D 55/10 (2013.01); B62D 55/12 (2013.01); B62D 55/14 (2013.01); B62D 11/22 (2013.01); B62D 11/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An oscillation limited driven steering track assembly comprising:
a track mechanism including a track frame, a sprocket and rollers rotatably secured to said track frame, and an endless track adapted to travel around said track frame and rollers and coupled to said sprocket;
a motor coupled to and rotatably driving said sprocket about a motor axis of rotation and thereby driving said track around said track frame and rollers;
wherein said motor is pivotally secured to a land vehicle about a steering axis whereby the motor and track mechanism are selectively rotated about the steering axis for steering the vehicle;
a longitudinally extensible and retractable apparatus having first and second ends;
wherein said apparatus is extensible to an extended position having a first longitudinal distance between said first and second ends and is retractable to a retracted position having a second longitudinal distance between said first and second ends, said first longitudinal distance being greater than said second longitudinal distance;
said apparatus first end being pivotally secured to said track frame;
said apparatus second end being pivotally secured to the vehicle about a pivot axis which is collinear with said steering axis; and,
wherein said track mechanism can oscillate about said motor axis of rotation and said oscillation is limited to between a first radial position wherein said apparatus is in its extended position and a second radial position wherein said apparatus is in its retracted position, and further wherein said track mechanism is rotatable around said steering axis for steering the vehicle.