Shelf extender

A clamp for attachment to a workpiece comprising:

• a C-shaped frame having a spine and two spaced apart arms cantilevered from the spine;
• one of said arms having a first clamping surface;
• the other of said arms having a cavity adjacent the free end thereof, and an upper plate and a lower plate, each of the plates thereof having an opening therein located to permit a bolt to pass therethrough;
• the lower plate being canted with respect to the upper plate;
• a conventional nut received within the cavity, the nut being of standard size and configuration and including an opening with an unmodified conventional internal helical thread of given standard size and having a given inside diameter;
• the opening in the nut being in general alignment with the openings in the plates;
• a conventional bolt of standard size and configuration including an unmodified conventional external helical thread of a standard size having an outside diameter no larger than the inside diameter of the nut opening;
• the plates of the cavity being shaped so that the nut is movable between a first position against the upper plate and a second position against the lower plate;
• in the first position, the nut is normal to the bolt and the bolt passes freely through the nut and in the second position, the nut is canted with respect to the bolt and at least a portion of the thread of the bolt engages at least a portion of the thread of the nut in threaded engagement, whereby the bolt may be moved to obtain a coarse adjustment in the first position of the nut and a fine adjustment in the second position of the nut;
• a second clamping surface on the end of the bolt to thereby permit the workpiece to be securely held between the first clamping surface and the second clamping surface.

In a clamp for engaging a workpiece having a spine and an arm cantilevered from the spine the improvement comprising:

• a cavity adjacent the free end of the arm to receive a conventional nut and having an upper plate and a lower plate, each of the plates having an opening therein located to permit a bolt to pass therethrough;
• a conventional nut received within the cavity, the nut being of standard size and configuration and including an opening with an unmodified conventional internal helical thread of given standard size and having a given inside diameter;
• the opening in the nut being in general alignment with the openings in the plates;
• a conventional bolt of standard size and configuration including an unmodified conventional external helical thread of a standard size having an outside diameter no larger than the inside diameter of the nut opening;
• the plates of the cavity being shaped such that the lower plate is canted with respect to the upper plate and so that the nut is movable between a first position against the upper plate and a second position against the lower plate;
• in the first position, the nut is normal to the bolt and the bolt passes freely through the nut and in the second position, the nut is canted with respect to the bolt and at least a portion of the thread of the bolt engages at least a portion of the thread of the nut in threaded engagement, whereby the bolt may be moved to obtain a coarse adjustment in the first position of the nut and a fine adjustment in the second position of the nut;
• a clamping surface on the end of the bolt for engaging the workpiece.

A shelf extender for holding a product so as to display the same to a purchaser forward of a shelf having two surfaces comprising:

• product receiving means having a floor and a back wall;
• a pair of end members having receiving means to receive the edges of the product receiving means;
• a clamp integral with each of the end members;
• said clamp comprising:
• a C-shaped frame having a spine and two spaced apart arms cantilevered from the spine;
• one of said arms having a first clamping surface;
• the other of said arms having a cavity adjacent the free end thereof, and an upper plate and a lower plate, each of the plates thereof having an opening therein located to permit a bolt to pass therethrough;
• the lower plate being canted with respect to the upper plate;
• a conventional nut received within the cavity, the nut being of standard size and configuration and including an opening with an unmodified conventional internal helical thread of given standard size and having a given inside diameter;
• the opening in the nut being in general alignment with the openings in the plates;
• a conventional bolt of standard size and configuration including an unmodified conventional external helical thread of a standard size having an outside diameter no larger than the inside diameter of the nut opening;
• the plates of the cavity being shaped so that the nut is movable between a first position against the upper plate and a second position wherein it is canted with respect to the first position;
• in the first position, the nut is normal to the bolt and the bolt passes freely through the nut and in the second position, the nut is canted with respect to the bolt and at least a portion of the thread of the bolt engages at least a portion of the thread of the nut in threaded engagement, whereby the bolt may be moved to obtain a coarse adjustment in the first position of the nut and a fine adjustment in the second position of the nut;
• a second clamping surface on the end of the bolt to thereby permit the workpiece to be securely held between the first clamping surface and the second clamping surface.