A convex wheel chock includes a contact surface generally facing a vehicle tire, a support element connected to the contact surface to transfer a tire load from the contact surface, and a base portion coupled to the support element to provide structural support to the wheel chock and transfer the tire load to a ground surface. The contact surface includes a convex surface to be engaged by the tire, extending generally upwards from the base portion to the support element, and a concave extension surface joined to an upper end of the convex surface.

A convex wheel chock includes a contact surface generally facing a vehicle tire, a support element connected to the contact surface to transfer a tire load from the contact surface, and a base portion coupled to the support element to provide structural support to the wheel chock and transfer the tire load to a ground surface. The contact surface includes a convex surface to be engaged by the tire, extending generally upwards from the base portion to the support element, and a concave extension surface joined to an upper end of the convex surface.

A hand lift system for positioning a wheel and tire to be placed on a vehicle hub, the system being made up of two primary components. A first paddle component provides a shovel shaped lever to be placed under the tire to be lifted up to the vehicle hub, with a handle grip to operate the lever arm. A second component provides a solid wedge chock on which the paddle component is placed to act as a fulcrum to the paddle component lever, or to act as a support once the tire is lifted to the appropriate height. The paddle component doubles as a tool for shifting the spare tire or flat tire into place. The chock component doubles as a wheel block for either a tire still on the vehicle or a spare tire that has been rolled to the side of the vehicle for use.

Wheel chock systems for use at loading docks and other locations are described herein. In some embodiments, the wheel chock systems can include a wheel chock assembly that is positionable in contact with a vehicle wheel to restrain the vehicle at a loading dock. The wheel chock assembly can include a sensor target, and a corresponding sensor can be mounted to, for example, an outer wall of the loading dock or a wheel chock storage cradle mounted to the outer wall. In operation, the sensor can emit a wireless signal (e.g., an electromagnetic signal) that is reflected off of the sensor target and received back by the sensor when the wheel chock has been positioned in a blocking relationship relative to the vehicle wheel to restrain the vehicle at the loading dock. The sensor can be operably connected to a loading dock signal system (e.g., a signal light system) that displays appropriate signals to loading dock personnel based on detection of proper wheel chock placement. In other embodiments, wheel chock systems can include other types of devices for wirelessly communicating wheel chock placement information to loading dock systems. Such device types can include, for example, Bluetooth, Wi-Fi, RFID, etc.

Wheel chock systems for use at loading docks and other locations are described herein. In some embodiments, the wheel chock systems can include a wheel chock assembly that is positionable in contact with a vehicle wheel to restrain the vehicle at a loading dock. The wheel chock assembly can include a sensor target, and a corresponding sensor can be mounted to, for example, an outer wall of the loading dock or a wheel chock storage cradle mounted to the outer wall. In operation, the sensor can emit a wireless signal (e.g., an electromagnetic signal) that is reflected off of the sensor target and received back by the sensor when the wheel chock has been positioned in a blocking relationship relative to the vehicle wheel to restrain the vehicle at the loading dock. The sensor can be operably connected to a loading dock signal system (e.g., a signal light system) that displays appropriate signals to loading dock personnel based on detection of proper wheel chock placement. In other embodiments, wheel chock systems can include other types of devices for wirelessly communicating wheel chock placement information to loading dock systems. Such device types can include, for example, Bluetooth, Wi-Fi, RFID, etc.

Provided is a vehicle wheel stopper. The vehicle wheel stopper includes a bracket, clamping jaws and a telescoping rod assembly. The clamping jaws include a first clamping jaw and a second clamping jaw. Both the first clamping jaw and the second clamping jaw are pivotally connected to the bracket. The telescoping rod assembly includes a telescoping rod set and a gear set. The gear set drives the telescoping rod set to rotate around an axis of the telescoping rod set, and the telescoping rod set simultaneously drives the first clamping jaw and the second clamping jaw so that the first clamping jaw and the second clamping jaw separately have a first state of simultaneously clamping the two spaced wheels and a second state of simultaneously loosening the two spaced wheels. In this device, the wrench rotates the gear set within a range of 360° to further drive the support rod.

Provided is a vehicle wheel stopper. The vehicle wheel stopper includes a bracket, clamping jaws and a telescoping rod assembly. The clamping jaws include a first clamping jaw and a second clamping jaw. Both the first clamping jaw and the second clamping jaw are pivotally connected to the bracket. The telescoping rod assembly includes a telescoping rod set and a gear set. The gear set drives the telescoping rod set to rotate around an axis of the telescoping rod set, and the telescoping rod set simultaneously drives the first clamping jaw and the second clamping jaw so that the first clamping jaw and the second clamping jaw separately have a first state of simultaneously clamping the two spaced wheels and a second state of simultaneously loosening the two spaced wheels. In this device, the wrench rotates the gear set within a range of 360° to further drive the support rod.

The invention relates to a stand base (10) for microscopes, which encompasses a stand base body (12) on which multiple rollers (14 to 20) for displacing the stand base (10) are fastened. The stand base (10) furthermore has a braking system (40) to prevent displacement of the stand base (10), the braking system encompassing at least two braking feet (44, 46).

The invention relates to a stand base (10) for microscopes, which encompasses a stand base body (12) on which multiple rollers (14 to 20) for displacing the stand base (10) are fastened. The stand base (10) furthermore has a braking system (40) to prevent displacement of the stand base (10), the braking system encompassing at least two braking feet (44, 46).

An automatic wheel chock device includes a motion unit and a mounting bracket for engaging a vehicle or trailer. The motion unit is connected to a swing arm having a wheel chock located along the distal end thereof. The motion unit transitions the swing arm between a retracted and extended position to secure the wheel chock against the vehicle tire.