Abstract: A lifting cart for assist in building construction processes using precast wall panels can include a panel handling mechanism coupled to a movable vehicle. The panel handling mechanism can include a clamping mechanism, a rotational mechanism, a linear mechanism, and a tilting mechanism. The movable vehicle can include two sets of wheels configured to move the vehicle in perpendicular directions. The lifting cart can handle the precast wall panels, from a wall panel package delivered to the construction site to the final location of the wall panels between beams of the building frame.

Abstract: An automatic locking mechanism can include one or more annular elements having teeth facing each other or facing away from each other. The automatic locking mechanism can include a rod disposed between the annular elements. The rod can have one or more pins configured to interface with the teeth of the annular elements. The pins and the teeth are also configured to rotate the rod when the annular elements move relative to the rod. The rotation of the rod can toggle a hook end of the rod in a hook receptacle, which can change states of the locking mechanism.

Abstract: A clamping device for lifting and moving objects can include a fixed and rotatable jaw facing a movable and rotatable jaw, which is activated by an arm assembly coupled to a fixed body. The clamping device can include a hand-free mechanism for switching between a clamping action and a jaw opening action for inserting the object. The clamping device can include a guiding mechanism for guiding an object to the space between the jaws, effectively enlarging the jaw opening for ease of clamping on thicker objects.

Abstract: A clamping device includes a rotatable element disposed between a jaw and a jaw support. The rotatable element has a slanting surface, interfacing a roller, and thus is configured to push the jaw toward an opposite jaw of the clamping device when rolling in a clamping direction. An auto lock mechanism is included in the clamping device, which can secure the rotating element for keeping the jaws separated. The auto lock mechanism can be activated or deactivated when the jaws are separated at a maximum or near maximum separation.

Abstract: An automatic locking mechanism can include one or more annular elements having teeth facing each other or facing away from each other. The automatic locking mechanism can include a rod disposed between the annular elements. The rod can have one or more pins configured to interface with the teeth of the annular elements. The pins and the teeth are also configured to rotate the rod when the annular elements move relative to the rod. The rotation of the rod can toggle a hook end of the rod in a hook receptacle, which can change states of the locking mechanism.

Abstract: A lifting cart for assist in building construction processes using precast wall panels can include a panel handling mechanism coupled to a movable vehicle. The panel handling mechanism can include a clamping mechanism, a rotational mechanism, a linear mechanism, and a tilting mechanism. The movable vehicle can include two sets of wheels configured to move the vehicle in perpendicular directions. The lifting cart can handle the precast wall panels, from a wall panel package delivered to the construction site to the final location of the wall panels between beams of the building frame.

Abstract: A clamping device for lifting and moving objects can include a fixed and rotatable jaw facing a movable and rotatable jaw, which is activated by an arm assembly coupled to a fixed body. The clamping device can include a hand-free mechanism for switching between a clamping action and a jaw opening action for inserting the object. The clamping device can include a guiding mechanism for guiding an object to the space between the jaws, effectively enlarging the jaw opening for ease of clamping on thicker objects.

Abstract: Swivel shackle can be configured to accept different sizes and designs of the shackles. The swivel shackle configurations can include a swivel assembly, which can include one or more coupling interfaces to allow coupling with shackles having different arc sizes and/or different designs.