Patent ID: 6581331
Filing Date: 2003-06-24
Classification: E05F,E05Y

Abstract:
An opening and closing mechanism comprising:a stationary primary track; a movable secondary track movable with respect to said primary track; an operating member having one end pivotally fixed to said primary track and an opposite end movable along said secondary track, said operating member having a guide surface extending therein, said guide surface having a length; a guide engageable with said guide surface and restrainedly movable along said primary track so as to cause pivotal movement of said operating member about said one end thereof, said guide surface being curved along at least a portion of said length thereof such that a tangent to said guide surface at a point where said guide surface crosses a longitudinal center line of said primary track forms an acute angle with said longitudinal center line, said acute angle being substantially constant throughout an approximately full range of said pivotal movement of said operating member.