Patent ID: 6152529
Filing Date: 2000-11-28
Classification: A47C,Y10S

Abstract:
A motor driven rocking chair comprising:a seat assembly;a base assembly; anda drive assembly;said seat assembly being rockably mounted onto said base assembly;said drive assembly being connected between said seat assembly and said base assembly and providing a rocking force to rock said seat assembly forward and rearward with respect to said base assembly;said seat assembly including a recliner chair assembly mounted onto a rocking structure;said recliner chair assembly including a seat cushion and an extendable leg rest;said rocking structure including a curved base contact element rockably supported on a support plate of a base assembly seat support structure and restricted from lateral movement by a pair of restriction pins, one on either side thereof and each vertically slidably entrapped within an elongated restriction pin slide aperture formed within each of two lateral restriction stops extending upward from opposed side edges of said base assembly;said base assembly including a footed floor contact structure coupled to said seat support structure, said seat support structure including said two lateral restriction stops and a front and a back rocker stop secured, respectively, to the front and back of said support plate of said seat support structure and that are sized to restrict forward and rearward rocking of said curved base contact element of said rocking structure of said seat assembly;said drive assembly including a DC drive motor, a drive cam coupled to a shaft of said DC drive motor, an AC/DC power supply with a variable resistance speed control resistor mechanically coupled to a motor speed control lever pivotally mounted to said base assembly, a safety relay having relay contacts in series connection between a DC drive motor power input and a power output of said AC/DC power supply that are controlled by a relay control input, a seat weight sensor motor cut off switch in series connection between said DC drive motor power input and said power output of said AC/DC power supply, a safety timer having a control output, a leg rest position sensor motor cut off switch, and a spring loaded shock absorbing drive linkage including first and second slidably connected link structures each having a pivot pin connecting aperture formed through a far end thereof and a stop collar formed around the circumference thereof, and a compression spring positioned between said two stop collars in a manner to bias said first and second link structures to an elongated position;said compression spring being compressible when said far ends of said first and second slidably connected link structures are compressed toward each other to provide a shock absorbing effect between said rocking structure and said base assembly;said control output of said safety timer and said leg rest position sensor motor cutoff switch being in parallel connection with said relay control input of said safety relay such that extending said leg rest of said seat assembly and expiration of a timer period each causes said relay contacts to move to an open state;said seat weight sensor motor cut off switch being a normally open mechanical switch positioned within said seat cushion of said seat assembly and having a switch actuation weight selected such that a weight of at least fifty pounds must be placed on said seat cushion of said seat assembly before said seat weight sensor motor cut off switch closes.