Patent ID: 8157468

Claim:
A motor mechanism ( 10 ) comprising: a cover plate ( 13 ) including a socket ( 15 ) having an opening in said cover plate ( 13 ) with first surfaces ( 19 ) located on either side of said socket ( 15 ) and second surfaces ( 20 ) defining U-shaped recesses at either end of said socket ( 15 ) and diametrically opposing said first surfaces ( 19 ), said opening being an elongated slot which is formed in said cover plate ( 13 ) and separates said first surfaces ( 19 ) as well as said second surfaces ( 20 ), and said cover plate ( 13 ) including an elongated aperture ( 22 ) which is formed in said cover plate ( 13 ) transverse to and at one of said ends of said socket ( 15 ) to form a resiliently flexible portion ( 21 ), said elongated aperture ( 22 ) extending beyond said first surfaces ( 19 ) of said socket ( 15 ); a cylindrical head ( 14 ) pivotally engagable within said socket ( 15 ), said cylindrical head ( 14 ) having a chamfered ends ( 17 ) to facilitate engagement of said cylindrical head ( 14 ) by said first ( 19 ) and second ( 20 ) surfaces of said socket ( 15 ), with said flexible portion ( 21 ) flexing outwardly during insertion of said cylindrical head ( 14 ) into said socket ( 15 ); and a rack ( 11 ) extending out of said cylindrical head ( 14 ), said rack ( 11 ) being pivotal with respect to said cover plate ( 13 ) as said cover plate ( 13 ) moves with respect to said motor mechanism ( 10 ).