US Patent 8210624 Symmetrical self-closing mechanism for a drawer slide

A self-closing drawer slide has a housing with a linear channel extending therein at an inner end of an outer longitudinal section. A catch is slidably mounted within the channel and has pivot pins 36 extending out either side thereof (only one side is shown) into corresponding slots in the sides of the channel. The catch is symmetrical about a longitudinal centre line of the housing and rocks rearward to unlock and engage a latch on an inner longitudinal section and forward to lock and release the latch. The catch is biased to slide to an inner end of the channel when the catch is unlocked and there are no external forces on the slide.