Abstract: The present invention provides a dock leveler that: facilitates safe and smooth movement of any driving device by reducing inclination of the dock leveler; and allows easy maintenance by removing a driving unit such as a hydraulic device. The dock leveler comprises a body which is fixed and rotatable on the rear top of an installation space for a dock; and a support unit supporting the body when positioned inside the installation space and sliding toward the front of the body so that the rear of the support unit can be connected to the front of the body when operating as a passage way for a transportation unit or a carrying unit.

Abstract: The present invention provides a dock leveler that: facilitates safe and smooth movement of any driving device by reducing inclination of the dock leveler; and allows easy maintenance by removing a driving unit such as a hydraulic device. The dock leveler comprises a body which is fixed and rotatable on the rear top of an installation space for a dock; and a support unit supporting the body when positioned inside the installation space and sliding toward the front of the body so that the rear of the support unit can be connected to the front of the body when operating as a passage way for a transportation unit or a carrying unit.

Abstract: A picture frame of the type having a frame member with a rearwardly extending peripheral flange and a back panel having an outer edge with the same general outline as the frame member and being arranged to seat against the frame member within the frame member flange includes one or more integral, resilient, cantilevered surface areas at the outer edge of the back panel each of which is arranged to resiliently engage a corresponding surface area of the frame member flange to releasably lock the back panel to the frame member when the former is seated against the latter.