Abstract: A quick coupling apparatus for detachably securing an implement such as a bucket, air or hydraulic hammer, tamper or any other attachment to a vehicle having a lifting and tilting mechanism such as an excavator. The apparatus includes a pair of hinge plates secured to the implement and two associated link assemblies adapted for mounting on the lifting and tilting mechanism of the vehicle and which engage and disengage the hinge plates to detachably secure the implement to the vehicle.

Abstract: A picture frame made of metal extrusions of identical cross sectional shape is assembled at its corners by the use of corner plate assemblies and cam operating buttons. The corner plate assemblies include a reaction plate having cam ramps formed therein, and a reaction sub-plate. The two plates are in closely-spaced parallel relationship to each other. There is an offset in one of the plates at the corner where it is welded to the other plate. The cam operating buttons are caged between the plates but can be operated by a quarter turn with a screwdriver which will tighten or loosen the corner assembly in two picture frame members joined at a corner, to thereby secure the frame members together at a corner.

Abstract: A picture frame made of metal extrusions of identical cross sectional shape is assembled at its corners by the use of corner plates and cam operating buttons. The plates have cam ramps formed therein and the buttons have integral cam lugs. A quarter turn with a screwdriver will tighten or loosen the assembly to close or open a corner.