Resources Contact Us Home
Rotating display stand

Image Number 2 for United States Patent #4236769.

A display stand is provided with a plurality of ring-like shelves arranged in a vertical array above a base with the first, third, fifth, etc., shelves above the base being in a first group which are rotatable in a first direction and with the second, fourth, sixth, etc., shelves above the base being in a second group which are rotatable in a second, opposite direction. A plurality of rotatable drive rods are spaced equidistantly around a circle in the base and project upwardly therefrom within the interior of the ring-like shelves. Each drive rod carries fixed rollers which rotate with the drive rod and which each have an annular groove therein for supporting and frictionally engaging an inner portion of one of the ring-like shelves. One half of the drive rods are thus engaged with the first group of shelves and are driven by a motor to rotate in the first direction. The other half of the drive rods are thus engaged with the first group of shelves and are driven to rotate in the second, opposite direction. When a predetermined amount of resistance torque is applied to one of the shelves upon removal of an article from that shelf, the frictional driving torque is overcome and that shelf remains stationary while the rollers engaged with that shelf slip relative to the shelf and continue to rotate.

  Recently Added Patents
Device to control force required to depress accelerator pedal
Method and structure of forming backside through silicon via connections
Pyridylphenyl compounds for inflammation and immune-related uses
Vending machine
Solar power system with communication network utilizing magnetic fields
Data processing apparatus, activation control method, and computer-readable storage medium
  Randomly Featured Patents
Unitary central cell element for filter press, solid polymer electrolyte electrolysis cell structure and process using said structure
Cardiac ablation system with low temperature target site identification
Musical instrument, music data producer incorporated therein and method for exactly discriminating hammer motion
Motor control device
Turbocharged internal combustion engine
Electromagnetic field simulation apparatus
Image forming apparatus for offsetting output sheet
Bristle filled sleeve and method of filling and using same
Yarn monitoring apparatus for an open end spinning turbine
Silver catalyst for production of ethylene oxide and method for manufacture thereof