This disclosure relates to system and method for docking or undocking a track-wheel based device. In some embodiments, the system may include a docking station configured to be fitted on a support track for the track-wheel based device. The docking station may include a protrusion to be fitted at a first position on the support track. The protrusion may be configured to make the track-wheel slide on the support track against the protrusion until an indentation on the track-wheel engages with the protrusion upon alignment. The system may further include an end-dock to be fitted at a second position on the support track. A segment of the support track between the first position and the second position is configured to accommodate the track-wheel during docking.

The present invention relates to a cart device primarily comprised of a body, at least one wheel, and at least one axle. In one embodiment, the device can be manually pulled using a handle. In another embodiment, the device has a motor that is powered by a battery and can be controlled by a remote such that the device can propel itself. In various embodiments, the wheel of the device can be optimized for various terrain such as sand, wherein said embodiment features a smooth and inflatable wheel. Further, the device is comprised of an umbrella holder that receives an umbrella and allows the device to act as a base for the umbrella. The device is also comprised of a tow hitch and a tow bar that allows the device to be pulled by a secondary vehicle such as, but not limited to, a golf cart.

Provided are tractor wheels for a downhole tractor. An example tractor wheel comprises a series of continuous springs disposed on the circumference of the tractor wheel, wherein the individual continuous springs in the series of continuous springs are separated by a gap, and a void disposed on the interior of the tractor wheel and that is continuous about the circumference of the tractor wheel.

This disclosure relates to system and method for docking or undocking a track-wheel based device. In some embodiments, the system may include a docking station configured to be fitted on a support track for the track-wheel based device. The docking station may include a protrusion to be fitted at a first position on the support track. The protrusion may be configured to make the track-wheel slide on the support track against the protrusion until an indentation on the track-wheel engages with the protrusion upon alignment. The system may further include an end-dock to be fitted at a second position on the support track. A segment of the support track between the first position and the second position is configured to accommodate the track-wheel during docking.

Provided are tractor wheels for a downhole tractor. An example tractor wheel comprises a series of continuous springs disposed on the circumference of the tractor wheel, wherein the individual continuous springs in the series of continuous springs are separated by a gap, and a void disposed on the interior of the tractor wheel and that is continuous about the circumference of the tractor wheel.

A non-pneumatic tire may include a polyurethane matrix and expanded thermoplastic elastomer particles. The non-pneumatic tire has 60 to 90 wt. % of the polyurethane matrix and 10 to 40 wt. % of the expanded thermoplastic elastomer particles. The non-pneumatic tire may be produced in a production method. The non-pneumatic tire may be used in a low-speed vehicle.

Provided are tractor wheels for a downhole tractor. An example tractor wheel comprises a series of continuous springs disposed on the circumference of the tractor wheel, wherein the individual continuous springs in the series of continuous springs are separated by a gap, and a void disposed on the interior of the tractor wheel and that is continuous about the circumference of the tractor wheel.

The disclosure addresses a series of interactions between wheels and a number of different replaceable tire segments to cover the wheels. The disclosure teaches more than one way to engage the one or more tire segments to wheels and to form seams between ends of the one or more tire segments. The tire segments may be removed and replaced so that the wheels and wheel bearing may be used longer than the useful life of the tire segments.

The disclosure addresses a series of interactions between wheels and a number of different replaceable tire segments to cover the wheels. The disclosure teaches more than one way to engage the one or more tire segments to wheels and to form seams between ends of the one or more tire segments. The tire segments may be removed and replaced so that the wheels and wheel bearing may be used longer than the useful life of the tire segments.

In regions, divided by the tire equator, on both sides of the tread surface of a tire, the tire includes a grip area along the entire circumference of the tread, the grip area including a plurality of recessed lines, with a shape recessed toward an inner side of the tire from the outline of the tread surface, that extend from the tread edge side in a direction inclined relative to the tire equator and are arrayed in parallel, and a plurality of sipes that extend toward the tire equator in a direction inclined relative to the tire equator, starting in the grip area and terminating before the tire equator. The negative ratio in the grip area is higher than the negative ratio closer to the tire equator than the grip area.