Abstract: The invention is a flexible boot that wraps around a tire to vary the trave effect of a tire. The boot is a band with a different tread pattern on either side, and the treads may have different tractive effects depending on which way the tread rotates relative to the ground. Either tread pattern can be configured to hold the boot on the tire if that pattern faces radially inwardly on the tire.

Abstract: The invention is a jack stand for using the drive power of a vehicle to re the vehicle off the ground. The jack stand has a retention device such as a cradle to engage an undercarriage member of the vehicle. The retention device is connected to a post which in turn is mounted to a base plate. The base plate is configured to allow the post to pivot to a vertical position as the vehicle is driven over the jack stand so that the post raises the vehicle.

Abstract: The invention is a jack stand for using the drive power of a vehicle to raise the vehicle off the ground. The jack stand has a retention device such as a cradle to engage an undercarriage member of the vehicle. The retention device is connected to a post which in turn is mounted to a base plate. The base plate is configured to allow the post to pivot to a vertical position as the vehicle is driven over the jack stand so that the post raises the vehicle.

Abstract: My invention is a jack stand having a platform, a pair of uprights on the atform, a post swingable between the uprights, a vehicle engagement member at one end of the post, and a keeper releasably locking the post in a selected position. The keeper has a collar sliding on the post, fingers protruding from the collar, finger guiding rails connected to the uprights, and notches in the uprights which the fingers enter to lock the post in its selected position. The jack stand can have a clutch to arrest the post in a set position until the vehicle engages the jack stand. The jack stand can also have a mechanism to maximize resistance to rotation of the post as the jack stand attempts to leave its selected position. The mechanism may include a foot on the post interferingly engaging the platform as the post leaves the selected position. The mechanism can also include a connective linkage that operates to increase or maximize the arresting effect of the clutch just as the post departs the selected position.

Abstract: The invention is a jack stand for using the device power of a vehicle to raise the vehicle off the ground. The jack stand has a retention device such as a cradle to engage an undercarriage member of the vehicle. The retention device is connected to a post which in turn is mounted to a base plate. The base plate is configured to allow the post to pivot to a vertical position as the vehicle is driven over the jack stand so that the post raises the vehicle.

Abstract: Disclosed is a load platform translatable along rails mounted to the exterior of a vehicle, the platform being tiltably mounted upon an axle extending between the rails. Supported on the axle is a manually releasable locking mechanism in which the axle rotates, the locking mechanism acting to maintain the axle and platform in a given translational position along the rails.