Apparatus for reciprocably moving a desired object such as a vehicle window panel

A vehicle door window regulator for moving a window panel up and down with respect to a door frame, said window regulator comprising:

• a drive ball assembly including a series of balls of rigid plastic and a flexible wire on which said balls are threaded together, said drive ball assembly having one end anchored to said window panel;
• ball guide means for guiding the drive ball assembly along a predetermined path including a first portion extending downwardly from the window panel and a second portion joined to said first portion at an angle thereto, said ball guide means including an elongated ball guide secured to the door frame and extending along said first portion of the predetermined path of the drive ball assembly;
• a drive wheel rotatably supported on the door frame and disposed at the joint between said first and second portions of the predetermined path of the drive ball assembly, the drive wheel having a series of concavities defined peripherally therein for driving engagement with the balls of the drive ball assembly;
• biasing means for biasing said drive ball assembly in a direction to urge said window panel toward a closed position with respect to the door frame;
• and
• window guide means for guiding the window panel up and down with respect to the door frame, said window guide means including an elongated window guide extending parallel to said elongate ball guide of the ball guide means and formed integral therewith, and a slider secured to the window panel and slidably engaged with said elongate window guide.