The present invention relates to a removable electric propulsion system intended to be coupled to a rolling object. The propulsion system comprises a chassis provided with at least one wheel driven by an electric machine, and at least one non-driven wheel. Furthermore, the system, preferably the chassis, comprises means (5) for coupling the propulsion system to the rolling object. Besides, the coupling means comprises at least one means (100) providing combined and simultaneous gripping and lifting of at least one wheel (14) of the rolling object, preferably of two wheels (14) of the rolling object.

The invention also relates to a method for coupling a rolling object to such a propulsion system, this method enabling, simultaneously and through a combined action, gripping and lifting of at least one wheel (14) of the rolling object.

Systems and methods are provided for securing a transport device to preexisting studs or support members. One embodiment includes a clamp assembly with a compression fitting adapted to be secured to a plurality of different sized studs or wall supports, and further to support additional supports including, but not limited, horizontal support members. A transport device is further provided that is selectively connectable to clamp and support members of the disclosure. In another embodiment, a hook bracket is provided which includes a projection configured to be positioned in a hole through a stud. The extension may include a notch to engage a portion of the stud. The hook bracket includes at least one aperture adapted to secure the hook bracket to a support member operatively interconnected to the transport device.

A cart comprises a body structure and at least one wheel connecting structure. The body structure comprises a support shaft, a first frame member and a second frame member. Both the first and second frame members are disposed on the support shaft. The wheel connecting structure is disposed on one end of the support shaft and comprises a driving assembly, a rotating assembly, a linking assembly, and an energy assembly. The driving assembly is connected to the first frame member. One end of the rotating assembly is disposed in correspondence with the one end of the support shaft, and the other end of the rotating assembly is mounted on a wheel member. The linking assembly is disposed between the driving assembly and the rotating assembly. The linking assembly comprises a pushing unit, which is pivotally connected to the rotating assembly. The energy assembly is connected to the linking assembly.

An apparatus for providing an efficient platform for installing screws can include a cart with wheels and a screw assembly mounted to the cart. The screw assembly can include a screwing device that rotates a drive shaft that engages a screw, a screw guide tube and a screw feeding tube connected to the screw guide tube. In another embodiment, an assembly is provided. The assembly may include a bracket for coupling to a moveable platform, a screwing device coupled to the bracket and that rotates a drive shaft that engages a screw, a screw guide tube and a screw feed tube connected to the screw guide tube.

Implementations of a wheelbarrow are provided. In some implementations, the wheelbarrow comprises a receptacle, a front wheel having an axle extending therethrough, a frame, handles, and a self balancer operatively connected to the frame. In some implementations, the front end, back end, first side, second side, and bottom of the receptacle are curved. In some implementations, the frame includes a first tube and second tube. In some implementations, each of the first tube and the second has a first portion that is concave and extends along the bottom and back end of the receptacle, a second portion that extends from the first portion towards the wheel and is convex, and a third portion that extends from the second portion toward the axle and is straight. In some implementations, the distal end of the third portion of the first tube and the second is operatively connected to the axle. In some implementations, the self balancer is configured so that the receptacle does not make contact with a surface when the wheel and the self balancer are in contact with the surface.

Implementations of a wheelbarrow are provided. In some implementations, the wheelbarrow comprises a receptacle, a front wheel having an axle extending therethrough, a frame, handles, and a self balancer operatively connected to the frame. In some implementations, the front end, back end, first side, second side, and bottom of the receptacle are curved. In some implementations, the frame includes a first tube and second tube. In some implementations, each of the first tube and the second has a first portion that is concave and extends along the bottom and back end of the receptacle, a second portion that extends from the first portion towards the wheel and is convex, and a third portion that extends from the second portion toward the axle and is straight. In some implementations, the distal end of the third portion of the first tube and the second is operatively connected to the axle. In some implementations, the self balancer is configured so that the receptacle does not make contact with a surface when the wheel and the self balancer are in contact with the surface.

A modular transporter comprises a universal chassis that can be linked with a variety of user modules. The universal chassis comprises a base that includes a quick connector and complex geometric surfaces on its sidewalls that function to secure a user module thereto. The quick connector allows for quick assembly/disassembly of a user module to and from the base of universal chassis. A plurality of suspension arms may be removeably connectable to the base such that modular transporter may be configured in a number of transport configurations. An ergonomic handle assembly may be coupled with the base for pushing, pulling, towing, etc. When disassembled, the modular transporter can be folded into a storage and/or quick fold mode and stored in a modular storage system. The modular storage system can be mounted to a trailer hitch by a linking mechanism for further transport.

Carrying arrangement for carrying apparatuses, in particular medical apparatuses, having a base carrier on which at least three roller elements are arranged in order to move the carrying arrangement with respect to a floor surface. The roller elements are each rotatable about first axes of rotation (D). At least one of these roller elements is pivotable about a pivot axis (S) with respect to the base carrier. The axes of rotation (D) and the pivot axis (S) extend in different directions. At least one supporting element is arranged at least indirectly on the base carrier. The supporting element does not contact the floor in a first position of the carrying arrangement with respect to the floor surface and the supporting element contacts the floor in a second position of the carrying arrangement with respect to the floor, the second position being pivoted with respect to the first position.

Carrying arrangement for carrying apparatuses, in particular medical apparatuses, having a base carrier on which at least three roller elements are arranged in order to move the carrying arrangement with respect to a floor surface. The roller elements are each rotatable about first axes of rotation (D). At least one of these roller elements is pivotable about a pivot axis (S) with respect to the base carrier. The axes of rotation (D) and the pivot axis (S) extend in different directions. At least one supporting element is arranged at least indirectly on the base carrier. The supporting element does not contact the floor in a first position of the carrying arrangement with respect to the floor surface and the supporting element contacts the floor in a second position of the carrying arrangement with respect to the floor, the second position being pivoted with respect to the first position.

A carrier device and a stowing method are disclosed. The rear wheel frame is disposed on the front wheel frame. The front wheel is disposed on a first end of the front wheel frame. The rear wheels are disposed on two ends of the rear wheel frame. The upper frame is disposed on a second end of the front wheel frame. The upper stoppers are disposed on the handle frame linkage, the upper frame or the handle frame. The carrier device has a stowing state including a stowing position, in the stowing position, a plane formed by the front wheel and a plane formed by one of the rear wheels are substantially perpendicular to each other, and the upper stoppers are disposed on two sides of the plane formed by the front wheel respectively. This disclosure has the advantages of easy folding and stowing.