Patent ID: 6089168
Filing Date: 2000-07-18
Classification: E05C,E05D,E05G,E05Y,G07F,Y10T

Abstract:
Apparatus enabling closing a secure door and selectively opening the door, comprising:an elongated bolt movably mounted relative to the door, the bolt movable between extended and retracted positions;a first idler cam rotatably mounted in supporting connection with the door adjacent to a first end of the bolt;a second idler cam rotatably mounted in supporting connection with the door adjacent a second end of the bolt;a drive cam rotatably mounted in supporting connection with the door in intermediate relation between the first and second idler cams;a lock operatively engagable with the drive cam, wherein the drive cam is movable when the lock is in an unlocked condition, and wherein the drive cam is held stationary by operative engagement with the lock when the lock is in a locked condition;a first L-link operatively extending between the drive cam and the first idler cam;a second L-link operatively extending between the drive cam and the second idler cam;a first S-link operatively extending between the first idler cam and the bolt;a second S-link operatively extending between the second idler cam and the bolt; andwherein rotational movement of the drive cam between a first position and a second position moves the bolt between the extended position and the retracted position, respectively, at least one of the idler cams being in abutting engagement with the bolt when the bolt is in the extended position to prevent movement of the bolt to the retracted position absent rotational movement of the at least one idler cam.