US Pat. No. 10,086,867

STEERABLE SYSTEM FOR ASPHALT MILLING ATTACHMENT

Asphalt Zipper, Inc., Pl...

1. A steering mechanism to provide steering capability for both a host vehicle and for a milling attachment separate from, but connectable to the host vehicle operated by an operator, the host vehicle providing propelling force to the milling attachment, the milling attachment having an outer frame, a height-adjustable inner frame, and a rotating cutting head fixed to the inner frame so that the cutting depth of the rotating cutting head depends on the adjusted height of the inner frame relative to the outer frame, the steering mechanism, comprising:an attachment mechanism configured to connect a milling attachment to a host vehicle;
a first wheel mounted to a first pivot shaft;
a second wheel mounted to a second pivot shaft, the outer frame being supported by the first wheel, the second wheel, and the host vehicle;
a support bar disposed across the front of the milling attachment forward of the rotating cutting head and connected to the outer frame, the support bar for receiving a first arm in pivoting engagement and a second arm in pivoting engagement, the first arm receiving the first pivot shaft in pivoting engagement and the second arm receiving the second pivot shaft in pivoting engagement, wherein the first arm and the second arm are each pivotally movable from a forward mode to a side mode enabling the front of the milling attachment to advance proximate an obstacle while maintaining steering capability;
a first steering actuator connected to and providing powered rotary motion to the first pivot shaft and the first wheel;
a second steering actuator connected to and providing powered rotary motion to the second pivot shaft and the second wheel; and
milling attachment steering controls positionable for access and actuation by the operator within the host vehicle to steer the milling attachment and the host vehicle, the steering controls being connected to the first steering actuator and second steering actuator of the steering mechanism allowing an operator to control steering of both the host vehicle and the milling attachment by activating the first steering actuator and the second steering actuator.

US Pat. No. 10,655,284

STEERABLE SYSTEM FOR ASPHALT MILLING ATTACHMENT

Asphalt Zipper, Inc., Pl...

1. A steering mechanism to provide steering capability for both a host vehicle and for a milling attachment selectively separable from, but connectable to the host vehicle operated by an operator, the host vehicle providing propelling force to the milling attachment, the steering mechanism comprising:a support bar disposed forward of and connected to a milling attachment forward of a rotating cutting head the support bar further comprising a wheel pivotally mounted to the support bar via a pivot shaft;
a first steering actuator connected to the pivot shaft;
a second steering actuator connected to the pivot shaft;
a laser guidance system positioned on the milling attachment and directed to a tolerance target set to sense the vertical and horizontal position of the milling attachment relative to the tolerance target; and
milling attachment steering controls positionable for access and actuation by a steering operator observing the laser guidance system to steer the milling attachment and the host vehicle allowing the steering operator to maintain a horizontal and vertical compliance, independent of the host vehicle operator, the steering controls being connected to the first steering actuator and second steering actuator of the steering mechanism allowing a steering operator to control steering of both the host vehicle and the milling attachment by activating the first steering actuator and the second steering actuator of the milling attachment.